ES1295471U - DENTAL INSTRUMENT FOR ADJUSTING A POSITIONAL RELATIONSHIP OF THE UPPER AND LOWER JAWS - Google Patents

Abstract

A dental instrument for setting a positional relationship of the upper and lower jaws, comprising a first conchoidal body for accommodating maxillary teeth and a second conchoidal body for accommodating mandibular teeth; wherein a projecting part for inducing adjustment of the positional relationship of the upper and lower jaws is arranged convexly toward an opposite jaw at a position of an occlusal surface of a posterior region of the first conchoidal body; wherein a guide part for guiding the protruding part to make the positional relationship of the upper and lower jaws normal is arranged at a position of an occlusal surface of the second conchoidal body; wherein a mesial surface of the projecting part and a distal surface of the guide part are respectively provided with interacting contact surfaces to induce adjustment of the positional relationship of the upper and lower jaws; and a holding part in stable contact with the second conchoidal body is arranged at a position of the protruding part facing towards an occlusal surface of the opposite jaw; and wherein when the first conchoidal body and the second conchoidal body interact, the distal surface of the guiding part guides the mesial surface of the protruding part to move, meanwhile the protruding part moves to a preset position to enable the protruding part to move. the supporting part is in stable contact with the occlusal surface of the second conchoidal body.

Description

DESCRIPTION

DENTAL INSTRUMENT FOR ADJUSTING A POSITIONAL RELATIONSHIP

OF THE UPPER AND LOWER JAWS

CROSS REFERENCE WITH RELATED REQUESTS

This application claims priority from Chinese patent applications 201911415898.8 and 201922484256.5, filed on December 31, 2019, each of which is hereby incorporated in its entirety by reference.

TECHNICAL FIELD

The present disclosure relates to the field of medical instrument technology, in particular to a dental instrument and a method of designing and a method of preparing the same.

BACKGROUND

Malocclusion refers to a phenomenon of dentognathic deformity caused by congenital hereditary factors or postnatal environmental factors during a process of growth and development of children, here postnatal environmental factors may include, for example, diseases, poor oral habits and eating disorders. mixed dentition, etc., and may also include periodontal injuries and diseases, etc. during the growth and development process. The factors and mechanisms of malocclusion formation are complex and its appearance process can be caused by a single factor and a single mechanism, or it can be the result of a combination of multiple factors or multiple mechanisms.

According to Angle's classification method, malocclusion is divided into class I malocclusion (neutroclusion), class II malocclusion (distoclusion) and class III malocclusion (mesiocclusion). Class II malocclusion is one of the common malocclusions in oral orthodontic clinical treatments and the typical manifestations of class II malocclusion are forward protrusion of the maxillary anterior teeth, deep anterior overlay, deep anterior overbite, teeth not covered by lips, inward overbite, short underbite or deep mentolabial groove or similar. For patients with mild and severe mandibular retrusion resulting from mandibular deficiency, since the patients are in the period of growth and development and even in the peak period of growth and development, functional appliances such as the Twin-Block, the activator, Herbst apparatus, functional regulator type II (FR-II) or the like to stimulate and promote forward growth of the mandible and can have a good corrective effect on the relationship between the anterior deep cover and the distomolar in many class II malocclusions.

The Twin-Block appliance serves to guide a mandible into a protruded position through the use of two protruding inclined surfaces when a patient bites down, in order to effectively utilize all functional correction forces, including a chewing force. A reverse Twin-Block appliance serves to guide the mandible into retrusion by using two protruding inclined surfaces when a patient bites down. An invisible dental appliance has become increasingly popular due to its wearing comfort, ease of removal and use, and beautiful aesthetics. But, how to combine the functional correction effect of the Twin-Block appliance and the invisible dental appliance to achieve the same or better correction effect, or how to improve the structure of the invisible dental appliance to achieve the same or better correction effect than the Twin-Block appliance, is an urgent problem to be solved.

Therefore, it is of great importance to develop a dental instrument for adjusting a positional relationship of upper and lower jaws with safety, comfort and convenience in mind.

SUMMARY

Some embodiments of the present disclosure provide a dental instrument, and a method of designing and a method of preparing the same. By providing a protruding part and a guiding part, respectively, in an upper jaw conical body and a lower jaw conical body, so that a positional relationship of the upper and lower jaws can be adjusted through the cooperation of the lower jaw part. outstanding and the guide part. The dental instrument provided by the present disclosure can not only adjust the positional relationship of the upper and lower jaws to be normal, but also correct the maloccluded teeth at the same time.

In one embodiment of the present disclosure, the present disclosure provides a dental instrument for adjusting a positional relationship of the upper and lower jaws, including a first conchoidal body for accommodating maxillary teeth and a second conchoidal body for accommodating mandibular teeth. A projecting part for inducing adjustment of the positional relationship of the upper and lower jaws is arranged convexly toward an opposite jaw at a position of an occlusal surface of a posterior region of the first conchoidal body, and a guiding part for guiding the protruding part for making the positional relationship of the upper and lower jaws normal is arranged at a position of an occlusal surface of the second conchoidal body. A mesial surface of the projecting part and a distal surface of the guide part are respectively provided with interacting contact surfaces to induce adjustment of the positional relationship of the upper and lower jaws; and a holding part in stable contact with the second conchoidal body is arranged at a position of the projecting part facing towards the occlusal surface of the opposite jaw. When the first conchoidal body and the second conchoidal body interact, the distal surface of the guide part guides the mesial surface of the protruding part to move, meanwhile the protruding part moves to a preset position to enable the supporting part to move. is in stable contact with the occlusal surface of the second conchoidal body.

In one embodiment of the present disclosure, the interacting contact surfaces provided on the mesial surface of the projecting part and on the distal surface of the guide part, respectively, are in smooth contact or non-smooth contact.

In an embodiment of the present disclosure, a structure of the buttress part is a concave-convex structure having the same anatomical features as an occlusal surface of a posterior region of the second conchoidal body.

In one embodiment of the present disclosure, the structure of the buttress part is a concave-convex structure formed by extending the anatomical features of the occlusal surface of the posterior region of the first body conchoidal towards the opposite jaw.

In an embodiment of the present disclosure, the structure of the supporting part is one or a combination of two or more of a structure having a matte surface, a structure having raised points, a structure having a hollow surface, or a structure having a perforated surface.

In an embodiment of the present disclosure, a stiffness of the projecting part is greater than a stiffness of a region of the first conchoidal body to accommodate the maxillary teeth; and a stiffness of the guide part is greater than a stiffness of a region of the second conchoidal body to accommodate the mandibular teeth.

In one embodiment of the present disclosure, the protruding portion is different from the first conchoidal body region to accommodate the maxillary teeth by at least one of thickness, hardness, material, and number of layers; the guide portion is different from the second conchoidal body region to accommodate the mandibular teeth by at least one of thickness, hardness, material, and number of layers.

In an embodiment of the present disclosure, a hardness and/or a modulus of elasticity of the supporting part in the projecting part is greater than a hardness and/or a modulus of elasticity of the region of the first conchoidal body to accommodate the maxillary teeth. .

In an embodiment of the present disclosure, a limiting part for limiting a relative movement of the protruding part together with the guiding part is further arranged on the second conchoidal body, a mesial surface of the limiting part and a distal surface of the protruding part. are provided, respectively, of interacting contact surfaces to stabilize the adjusted positional relationship of the upper and lower jaws; when the first conchoidal body and the second conchoidal body interact, the protruding part is located between the guiding part and the limiting part.

In an embodiment of the present disclosure, the interacting contact surfaces arranged on the mesial surface of the limiting part and on the distal surface of the protruding part, respectively, are non-smooth surfaces.

In an embodiment of the present disclosure, the non-smooth surface is one or a combination of two or more of a structure having a matte surface, a structure having raised points, a structure having a hollow surface, or a structure having a perforated surface.

In one embodiment of the present disclosure, the protruding part and the limiting part are respectively provided internally with magnets having the same polarity to induce adjustment of the positional relationship of the upper and lower jaws.

In one embodiment of the present disclosure, the protruding part and the guide part are internally provided, respectively, with magnets having opposite polarities to stabilize a relative positional relationship of the upper and lower jaws, and the limiting part is internally provided with a magnet having the same polarity as the magnet in the protruding part.

In an embodiment of the present disclosure, a plurality of protruding parts are arranged on the first conchoidal body, a plurality of guide parts that interact with the protruding parts are arranged on the second conchoidal body, and the plurality of protruding parts and the guide parts interact to induce adjustment of the positional relationship of the upper and lower jaws to be normal.

In an embodiment of the present disclosure, a length of the protruding part along a mesial-distal direction of the dentition at least partially covers a length of the mesial-distal direction of the teeth of the posterior region; and a length of the guide part along a mesial-distal direction of the dentition at least partially covers a length of a mesial-distal direction of the canines.

In an embodiment of the present disclosure, the protruding part and/or the guiding part is filled with a filling portion to increase an occlusion intensity.

In one embodiment of the present disclosure, the protruding part and the guide part are respectively provided with magnets having opposite polarities to stabilize the relative positional relationship of the upper and lower jaws.

In one embodiment of the present disclosure, the protrusion and the first conchoidal body are integrally formed; and the guide part and the second conchoidal body are integrally formed.

In one embodiment of the present disclosure, the present disclosure provides another dental instrument for adjusting a positional relationship of the upper and lower jaws, including a first conchoidal body for accommodating maxillary teeth and a second conchoidal body for accommodating mandibular teeth. A protruding part for inducing adjustment of the positional relationship of the upper and lower jaws is disposed convexly toward an opposite jaw at a position of an occlusal surface of a posterior region of the first conchoidal body, and a guide part for guiding the protruding part to make the positional relationship of the upper and lower jaws normal is arranged at a position of an occlusal surface of the second conchoidal body. A distal surface of the projecting part and a mesial surface of the guide part are respectively provided with interacting contact surfaces to induce adjustment of the positional relationship of the upper and lower jaws; and a holding part in stable contact with the second conchoidal body is arranged at a position of the protruding part facing towards an occlusal surface of the opposite jaw. When the first conchoidal body and the second conchoidal body interact, the mesial surface of the guide part guides the distal surface of the protruding part to move, meanwhile the protruding part moves to a preset position to enable the supporting part to move. is in stable contact with the occlusal surface of the second conchoidal body.

In one embodiment of the present disclosure, the interacting contact surfaces provided on the distal surface of the projecting part and on the mesial surface of the guide part, respectively, are in smooth contact or non-smooth contact.

In an embodiment of the present disclosure, a structure of the buttress part is a concave-convex structure having the same anatomical features as an occlusal surface of a posterior region of the second conchoidal body.

In an embodiment of the present disclosure, the structure of the support part is a concave-convex structure formed by extending the Anatomical features of the occlusal surface of the posterior region of the first conchoidal body towards the opposite jaw.

In an embodiment of the present disclosure, a stiffness of the projecting part is greater than a stiffness of a region of the first conchoidal body to accommodate the maxillary teeth; and a stiffness of the guide part is greater than a stiffness of a region of the second conchoidal body to accommodate the mandibular teeth.

In one embodiment of the present disclosure, the protruding portion is different from the first conchoidal body region to accommodate the maxillary teeth by at least one of thickness, hardness, material, and number of layers; the guide portion is different from the second conchoidal body region to accommodate the mandibular teeth by at least one of thickness, hardness, material, and number of layers.

In an embodiment of the present disclosure, a hardness and/or a modulus of elasticity of the supporting part in the projecting part is greater than a hardness and/or a modulus of elasticity of the region of the first conchoidal body to accommodate the maxillary teeth. .

In an embodiment of the present disclosure, a limiting part for limiting a relative movement of the protruding part together with the guiding part is further arranged on the second conchoidal body, a distal surface of the limiting part and a mesial surface of the protruding part. they are respectively provided with interacting contact surfaces to stabilize a tight positional relationship of the upper and lower jaws; when the first conchoidal body and the second conchoidal body interact, the protruding part is located between the guiding part and the limiting part.

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In one embodiment of the present disclosure, the interacting contact surfaces provided on the distal surface of the limiting part and the mesial surface of the protruding part, respectively, are non-smooth surfaces.

In an embodiment of the present disclosure, the non-smooth surface is one or a combination of two or more of a structure having a matte surface, a structure having raised points, a structure having a hollow surface, or a structure having a perforated surface.

In one embodiment of the present disclosure, the protruding part and the limiting part are respectively provided internally with magnets having the same polarity to induce adjustment of the positional relationship of the upper and lower jaws.

In one embodiment of the present disclosure, the protruding part and the guide part are internally provided, respectively, with magnets having opposite polarities to stabilize the relative positional relationship of the upper and lower jaws, and the limiting part is internally provided with a magnet having the same polarity as the magnet on the protruding part.

In an embodiment of the present disclosure, a plurality of projecting parts are arranged on the first conchoidal body, a plurality of guide parts that interact with the projecting parts are arranged on the second conchoidal body, and the plurality of projecting parts and the parts Guidewires interact to induce adjustment of the positional relationship of the upper and lower jaws to be normal.

In one embodiment of the present disclosure, a length of the protruding part along a mesial-distal direction of the dentition covers the less partially a length of the mesial-distal direction of the teeth of the posterior region; and a length of the guide part along a mesial-distal direction of the dentition at least partially covers a length of a mesial-distal direction of the canines.

In an embodiment of the present disclosure, the protruding part and/or the guiding part is filled with a filling portion to increase an occlusion intensity.

In one embodiment of the present disclosure, the protruding part and the guide part are respectively provided with magnets having opposite polarities to stabilize the relative positional relationship of the upper and lower jaws.

In one embodiment of the present disclosure, the protrusion and the first conchoidal body are integrally formed; and the guide part and the second conchoidal body are integrally formed.

In one embodiment of the present disclosure, the present disclosure further provides a dental orthodontic system, including multiple sets of dental instruments for adjusting a positional relationship of the upper and lower jaws. The multiple sets of dental instruments for adjusting the positional relationship of the upper and lower jaws include at least one set of dental instruments for adjusting the positional relationship of the upper and lower jaws as mentioned above.

In one embodiment of the present disclosure, the plurality of groups of dental instruments for adjusting the positional relationship of the upper and lower jaws are geometrically shaped to gradually reposition the teeth from an initial position to a target correction position.

In an embodiment of the present disclosure, in different sets of dental instruments for adjusting the positional relationship of upper and lower jaws, a height at which a protruding portion provided protrudes toward an opposite jaw, and a height at which a guide portion arranged to protrude toward an opposite jaw gradually become smaller in conjunction with an orthodontic process.

In one embodiment of the present disclosure, the present disclosure further provides a method of designing a dental instrument for adjusting a positional relationship of upper and lower jaws, including the steps of:

obtain a first initial digital dental-jaw model;

designing a protruding part model on an occlusal surface of a posterior region of the initial dental-jaw first digital model, specifically including: obtaining characteristic information of a protruding part; here, the protrusion feature information includes a preset size and position of the protrusion, and an occlusal surface of the protrusion facing the teeth of an opposing jaw is matched with an occlusal surface of a posterior region of the jaws. teeth of opposite jaw concave-convex in shape or match occlusal surface of posterior region of teeth of opposite jaw in bite pattern;

generating a first digital dental-jaw model having the overhang based on the initial first digital dental-jaw model and the overhang model;

design a first conchoidal dental instrument based on the first

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digital dental-jaw model, so that the first conchoidal dental instrument is a shell having a cavity to accommodate a first dentition, a posterior region of the first conchoidal dental instrument has the protruding part protruding toward the opposite jaw, and the protruding part includes a mesial surface and a distal surface of the protruding part; Obtain a second initial digital dental-jaw model;

designing a guide part model on an occlusal surface of the second initial jaw-dental digital model, specifically including: obtaining feature information of a guide part; here the guide part feature information includes a size and a preset position of the guide part;

generating a second digital dental-jaw model having the guide part based on the second initial digital dental-jaw model and the guide part model;

designing a second conchoidal dental instrument based on the second digital dental-jaw model, so that the second conchoidal dental instrument is a shell having a cavity for accommodating a second dentition, the second conchoidal dental instrument has the guide part cooperating with the protruding part of the first conchoidal dental instrument, and the guide part includes a mesial surface and a distal surface of the guide part;

herein, the first conchoidal dental instrument and the second conchoidal dental instrument, respectively, are the first conchoidal body for accommodating maxillary teeth and the second conchoidal body for accommodating mandibular teeth as mentioned above; when the first conchoidal body and the second conchoidal body interact, the guide part guides the protruding part to move, and meanwhile, the protruding part moves to a preset position to enable the holding part to be in stable contact with the occlusal surface of the second conchoidal body.

In one embodiment of the present disclosure, the distal surface of the guide portion guides the mesial surface of the protrusion for movement, or the mesial surface of the guide portion guides the distal surface of the protrusion for movement. .

In an embodiment of the present disclosure, designing the second conchoidal dental instrument based on the second dental-jawbone digital model further includes a step of designing a limiting part, so that the designed dental instrument limits a relative movement of the protruding part by between the limiting part and the guiding part, here the limiting part includes a mesial surface and a distal surface of the limiting part.

In one embodiment of the present disclosure, the mesial surface of the limiting portion and the distal surface of the protruding portion are respectively provided with interacting contact surfaces to stabilize the adjusted positional relationship of the upper and lower jaws; or, the distal surface of the limiting part and the mesial surface of the protruding part are respectively provided with interacting contact surfaces to stabilize the adjusted positional relationship of the upper and lower jaws.

In one embodiment of the present disclosure, the present disclosure further provides a method of preparing a dental instrument for adjusting a positional relationship of the upper and lower jaws in order to

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preparing a dental instrument based on the design method described above. The preparation method includes a hot-press molding preparation method or a direct three-dimensional printing method.

Compared with existing technologies, the dental instrument for adjusting the positional relationship of the upper and lower jaws of the present disclosure, providing the protruding part in the first conchoidal body to accommodate the maxillary teeth and the guiding part in the second conchoidal body for accommodating the mandibular teeth by providing interacting contact surfaces on a mesial surface of the protruding part and on a distal surface of the guide part, respectively, to induce adjustment of the positional relationship of the upper and lower jaws and by arranging a part in stable contact with the second conchoidal body in a position of the protruding part facing toward an occlusal surface of an opposite jaw, thus, when the first conchoidal body and the second conchoidal body interact, the distal surface of the conchoidal part guide guides the mesial surface of the protruding part so that ue to move and, meanwhile, the protruding part is moved to a preset position to enable the holding part to be in stable contact with the occlusal surface of the second conchoidal body. Using the protruding part and the guiding part disposed on the occlusal surfaces, when the first conchoidal body and the second conchoidal body interact, the occlusion can be opened while inducing adjustment of the positional relationship of the upper and lower jaws. Specifically, the lower jaw can be guided to protrude. In this way, a good effect of

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treatment especially for Angle class II cases with a depth of the curve of Spee greater than 3 mm.

Likewise, another dental instrument for adjusting the positional relationship of the upper and lower jaws of the present disclosure, providing a projecting part in a first conchoidal body to accommodate the maxillary teeth and a guiding part in a second conchoidal body to accommodate the mandibular teeth. by providing interacting contact surfaces on a distal surface of the projecting part and on a mesial surface of the guide part, respectively, to induce adjustment of the positional relationship of the upper and lower jaws and arranging a supporting part in stable contact with the second conchoidal body in a position of the protruding part facing an occlusal surface of an opposite jaw, thus, when the first conchoidal body and the second conchoidal body interact, the mesial surface of the guide part guides the distal surface of the protruding part to make it move, and meanwhile the par The protruding tee is moved to a preset position to enable the holding part to be in stable contact with the occlusal surface of the second conchoidal body. Using the protruding part and the guiding part disposed on the occlusal surfaces, when the first conchoidal body and the second conchoidal body interact, the occlusion can be opened while inducing adjustment of the positional relationship of the upper and lower jaws. Specifically, the lower jaw can be guided to retract. In this way, a good treatment effect is produced especially for Angle class III cases with a depth of curve of Spee greater than 3 mm.

Also, the dental orthodontic system of the present disclosure includes Multiple sets of dental instruments to adjust the positional relationship of the upper and lower jaws. The multiple sets of dental instruments for adjusting the positional relationship of the upper and lower jaws are geometrically shaped to gradually reposition the teeth from an initial position to a target correction position. In the whole orthodontic process, when a series of multiple sets of dental instruments to adjust the positional relationship of the upper and lower jaws adjust the positional relationship of the upper and lower jaws, they also correct the maloccluded teeth, thus achieving the orthopedic process. and orthodontic in a synchronized way. In addition, in the method of designing the dental instrument for adjusting the positional relationship of the upper and lower jaws of the present disclosure, the protruding part is arranged on the first conchoidal dental instrument and the guiding part is arranged on the second conchoidal dental instrument. so that the projecting part and the guide part can be in contact when the first conchoidal dental instrument and the second conchoidal dental instrument occlude, so as to adjust the positional relationship of the upper and lower jaws. With the design of the supporting part, a relative occlusal position of the upper and lower jaws becomes more stable.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a schematic diagram illustrating a dental instrument for adjusting a positional relationship of upper and lower jaws in accordance with one embodiment of the present disclosure.

Figure 2 is a schematic diagram illustrating a relative positional relationship of a first conchoidal body and a second conchoidal body.

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in a state of occlusion in the dental instrument of figure 1.

Figure 3 is a schematic diagram illustrating a dental instrument for adjusting a positional relationship of upper and lower jaws in accordance with one embodiment of the present disclosure.

Fig. 4 is a schematic diagram illustrating a relative positional relationship of a first conchoidal body and a second conchoidal body in an occlusion state in the dental instrument of Fig. 3.

Figure 5 is a schematic diagram illustrating a dental instrument for adjusting a positional relationship of upper and lower jaws in accordance with one embodiment of the present disclosure.

Fig. 6 is a schematic diagram illustrating a relative positional relationship of a first conchoidal body and a second conchoidal body in an occlusion state in the dental instrument of Fig. 5.

Figure 7 is an enlarged view of a dashed line region in Figure 6.

diagrama esquemático que ilustra una relación posicional relativa de un primer cuerpo concoideo

segundo cuerpo concoideo en un estado de oclusión en un instrumento dental para ajustar una relación posicional de las quijadas superior e inferior de acuerdo con una realización de la presente divulgación.Figure 8 is

schematic diagram illustrating a relative positional relationship of a first conchoidal body

second conchoidal body in an occlusion state in a dental instrument for adjusting a positional relationship of upper and lower jaws according to one embodiment of the present disclosure.

diagrama esquemático que ilustra una relación posicional relativa de un primer cuerpo concoideo

segundo cuerpo concoideo en un estado de oclusión en un instrumento dental para ajustar una relación posicional de las quijadas superior e inferior de acuerdo con una realización de la presente divulgación.Figure 9 is

schematic diagram illustrating a relative positional relationship of a first conchoidal body

second conchoidal body in an occlusion state in a dental instrument for adjusting a positional relationship of upper and lower jaws according to one embodiment of the present disclosure.

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The figure is a schematic diagram illustrating a relative positional relationship of a first conchoidal body and a second conchoidal body in an occlusion state in a dental instrument for adjusting a positional relationship of upper and lower jaws according to one embodiment. of this disclosure.

Figure 11 is an enlarged view of a dashed line region in Figure 10.

Fig. 12 is a flowchart illustrating a design method of a dental instrument for adjusting a positional relationship of upper and lower jaws in accordance with one embodiment of the present disclosure. DETAILED DESCRIPTION OF EMBODIMENTS

In order to make the objects, technical solutions and advantages of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be clearly and completely described in combination with the accompanying drawings of the present disclosure. Apparently, the embodiments described herein are merely some embodiments of the present disclosure rather than all of the embodiments. Other embodiments obtained by those skilled in the art based on the embodiments without performing creative work will be within the scope of protection of the present disclosure. Unless otherwise defined, technical terms or scientific terms used herein shall have general meanings that can be understood by those skilled in the art. Terms such as "include" used herein are intended to indicate that an element or article preceding the word covers an element or article or their equivalents listed after

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of the word and does not exclude other elements or articles.

Due to existing problems in existing technologies, some embodiments of the present disclosure provide a dental instrument for adjusting a positional relationship of the upper and lower jaws to effectively guide the lower jaw to move and open the occlusion of the back teeth. . More specifically, a frictional structure is provided on an occlusal surface of a jaw pad of the dental instrument for adjusting the positional relationship of the upper and lower jaws to stabilize a relative positional relationship of the upper and lower jaws during occlusion and preventing the lower jaw is in a protruded position and meanwhile have a relatively stable occlusal relationship. The jaw pad corresponds to a protruding part to induce adjustment of the positional relationship of the upper and lower jaws as described below. According to the definition for dental classification on pages 36 to 38 of the Guide to Stomatology Version 2, published by the University of Beijing Press House, the "posterior region" includes the premolars and molars, teeth shown as 4 to 8 per the FDI labeling method and teeth 1 to 3 shown by the FDI labeling method in a front tooth region A mesial surface and a distal surface are two surfaces of a dental crown that adjoin adjacent teeth, and are collectively referred to as an adjacent surface A surface close to a center line of a face is called the mesial surface and a surface away from the center line of the face is called the distal surface.A direction close to the center line of the face is called a mesial direction and a direction away from the center line of the face is called a distal direction.

Fig. 1 is a schematic diagram illustrating a dental instrument for adjusting a positional relationship of upper and lower jaws in accordance with one embodiment of the present disclosure. Fig. 2 is a schematic diagram illustrating a relative positional relationship of a first conchoidal body and a second conchoidal body in an occlusion state in the dental instrument of Fig. 1.

Referring to Figure 1 and Figure 2, the dental instrument 10 for adjusting the positional relationship of the upper and lower jaws includes a first conchoidal body 1 for accommodating the maxillary teeth and a second conchoidal body 2 for accommodating the mandibular teeth. A protruding part 3 for inducing adjustment of the positional relationship of the upper and lower jaws is arranged convexly toward an opposite jaw at a position of an occlusal surface of a posterior region of the first conchoidal body; and a guide part 4 for guiding the protruding part 3 to make the positional relationship of the upper and lower jaws normal is arranged at a position of an occlusal surface of the second conchoidal body. A mesial surface 31 of the projecting part 3 and a distal surface 41 of the guide part 4 are respectively provided with interacting contact surfaces to induce adjustment of the positional relationship of the upper and lower jaws; and a holding part 32 in stable contact with the second conchoidal body is arranged at a position of the protruding part 3 facing towards an occlusal surface of the opposite jaw. When the first conchoidal body and the second conchoidal body interact, the distal surface 41 of the guide part 4 guides the mesial surface 31 of the protruding part 3 to move, and meanwhile, the protruding part 3 moves. moves to a preset position to enable the holding part 32 to be in stable contact with the occlusal surface of the second conchoidal body 2.

In an optional embodiment, the interacting contact surfaces arranged on the mesial surface 31 of the projecting part 3 and the distal surface 41 of the guide part 4, respectively, are in smooth contact. When a patient uses the dental instrument 10 to adjust the positional relationship of the upper and lower jaws and bites down, the protruding portion 3 can be guided to move to a preset position through the smooth-contacting interacting surfaces. Herein, the mesial surface 31 and the distal surface 41, for example, are smooth planes, smooth curved surfaces, or smooth inclined surfaces. Interactive contact of smooth planes, curved surfaces, or inclined surfaces forms the previous smooth contact.

In an optional embodiment, the interacting contact surfaces arranged on the mesial surface 31 of the projecting part 3 and on the distal surface 41 of the guide part 4, respectively, are in non-smooth contact. The contact surface in non-smooth contact is a frictional structure, a concave-convex matching structure or a surface-patterned structure or the like. When a patient uses the dental instrument 10 to adjust the positional relationship of the upper and lower jaws and bites down, the protruding part 3 can be guided to move to a preset position through the non-moving, non-smooth contacting interacting surfaces. relative. Herein, the mesial surface 31 of the projecting part 3 and the distal surface 41 of the guide part 4, for example,

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they are not smooth planes, not smooth curved surfaces, or not smooth inclined surfaces. Interactive contact of non-smooth planes, curved surfaces, or inclined surfaces forms the previous non-smooth contact.

In an optional embodiment, the structure of the supporting part 32 arranged in a position of the protruding part 3 facing towards the occlusal surface of the opposite jaw is a concave-convex structure having the same anatomical characteristics as an occlusal surface of a region posterior of the second conchoidal body 2. When the first conchoidal body 1 and the second conchoidal body 2 interact, since the concave-convex structure of the surface of the supporting part 32 on the protruding part 3 has the same anatomical characteristics as the surface occlusal to the posterior region of the second conchoidal body 2, the supporting part 32 forms a concave-convex structure protruding in the same direction upon contact with the posterior region of the second conchoidal body 2, thus achieving a closer combination. Alternatively, a supporting part structure 32 arranged at a position of the protruding part 3 towards an occlusal surface of the opposite jaw forms the concave-convex structure by extending the anatomical features of the occlusal surface of the posterior region of the conchoidal body 1 towards the opposite jaw. When the first conchoidal body 1 and the second conchoidal body 2 interact, since the concave-convex surface structure of the supporting part 32 on the protruding part 3 has the same anatomical features as the occlusal surface of the posterior region of the first conchoidal body 1, the supporting part 32 forms a concave-convex structure protruding in different directions upon contact with the posterior region of the second conchoidal body 2. That is, the concave-convex structure formed by extending towards the opposite jaw and the posterior region of the second conchoidal body 2 form a concave-convex occlusal structure in stable cusp-fossa cooperation, thus achieving a more close. As used herein, the anatomical features of the occlusal surface refer to a concave-convex structure composed of cusps, pits, and fissures on the occlusal surface of teeth.

In an optional embodiment, the structure of the holder part 32 can also be one or a combination of two or more of a structure having a matte surface, a structure having raised points, a structure having a hollow surface or a structure having a perforated surface. The addition of a plurality of structures to increase the frictional force on the abutment part 32 can help to enable the abutment part 32 to be in stable contact with the occlusal surface of the second conchoidal body 2 when the upper and lower jaws bite, preventing thus a correction error resulting from a relative movement of the projecting part 3 and the guide part 4.

In an optional embodiment, a stiffness of the projecting part 3 is greater than a stiffness of a region of the first conchoidal body 1 to accommodate maxillary teeth; and a stiffness of the guide part 4 is greater than a stiffness of a region of the second conchoidal body 2 to accommodate the mandibular teeth. Likewise, the projecting part 3 is different from the region of the first conchoidal body 1 to accommodate the maxillary teeth by at least one of thickness, hardness, material and number of layers; the guide part 4 is different from the region of the second conchoidal body 2 to accommodate the

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mandibular teeth in at least one of thickness, hardness, material and number of layers. When the protruding part 3 and the guide part 4 are protruding cavitations, they may be easily deformed due to the interaction thereof, thus it may affect the correction effect. In this case, the stiffnesses of the projecting part 3 and the guide part 4 can be increased to effectively prevent deformations resulting from their interactions.

Additionally, a hardness and/or a modulus of elasticity of the supporting part 32 in the projecting part 3 is higher than a hardness and/or a modulus of elasticity of the region of the first conchoidal body 1 to accommodate the maxillary teeth. Since the projecting part 3 is arranged on the occlusal surface of the first conchoidal body 1 and the holding part 32 can be easily deformed or broken under the action of a biting force upon contact with the second conchoidal body 2, the hardness and / or the modulus of elasticity of the supporting part 32 can be increased to effectively prevent the occurrence of the above phenomenon.

In the present disclosure, various physical parameters of the protruding part 3 and the supporting part 32 can be adjusted to help prolong the service lives of the protruding part 3 and the supporting part 32, and to reduce their wear.

In a specific embodiment, the thickness of the first conchoidal body 1 and/or the thickness of the second conchoidal body 2 can be from 0.1 mm to 2.0 mm.

In an optional embodiment, a plurality of protruding parts 3 are arranged on the first conchoidal body 1 and a plurality of guide parts 4 are arranged on the second conchoidal body 2, here the plurality of

2

protruding parts 3 are in one-to-one correspondence with the plurality of guide parts 4. The plurality of protruding parts 3 and the plurality of guide parts 4 interact to induce adjustment of the positional relationship of the upper and lower jaws to be normal. In this embodiment, a number of the protruding part 3 is 2 and a number of the guide part 4 is 2. Here, two protruding parts 3 are arranged in a left rear region and a right rear region of the first conchoidal body 1, respectively, and two guide parts 4 are correspondingly arranged in a left rear region and a right rear region of the second conchoidal body 2, respectively. It is noted that, when a plurality of protruding parts 3 and guiding parts 4 are provided, the plurality of protruding parts 3 must be distributed in a left tooth region and a right tooth region of the first conchoidal body 1 at the same time, and the plurality of guide parts 4 should be distributed in a left dental region and a right dental region of the second conchoidal body 2 at the same time.

The plurality of the protruding parts 3 and the guide parts 4 interact to induce adjustment of the positional relationship of the upper and lower jaws to be normal. The interaction of the plurality of the protruding parts 3 and the guiding parts 4 can produce a stronger actuating force, so that the first conchoidal body 1 and the second conchoidal body 2 can better adjust the positional relationship of the upper jaws. and lower to make it normal. Specifically, for example, two protruding parts 3 are respectively arranged on the left and right cheek sides of the first conchoidal body 1 and two guide parts 4 are respectively arranged on the left and right cheek sides of the first conchoidal body 1. second conchoidal body 2. Taking the left side as an example, a front protruding part and a rear protruding part are arranged on the left side of the first conchoidal body 1, and a front guide part and a rear guide part are arranged with the left side. left of the second conchoidal body 2. At this time, the front protruding part is arranged between a front limiting part and a rear limiting part, and the front protruding part may or may not be in contact with the rear limiting part. When the front protruding part is not in contact with the rear limiting part, a distal surface of the front protruding part is not in contact with a mesial surface of the rear limiting part, that is, there is a particular distance between them. When the front protruding part is in contact with the rear limiting part, the distal surface of the front protruding part is in contact with the mesial surface of the rear limiting part, that is, there is no distance between them.

In other embodiments, different numbers of protruding parts 3 are provided on the occlusal surfaces of the posterior regions on both sides of the first conchoidal body 1 respectively (not shown), and correspondingly, different numbers of guide parts 4 are also provided on the surfaces. occlusal parts of both sides of the second conchoidal body 2 (not shown) respectively. The different numbers of protruding parts 3 and guide parts 4 interact to induce adjustment of the positional relationship of the upper and lower jaws to be normal. For example, in this embodiment, the different numbers of protruding parts 3 refer to two protruding parts 3 arranged respectively on the left and right sides of the upper jaw, and the different numbers of

2

guide parts 4 refer to three guide parts 4 respectively arranged on the left and right sides of the lower jaw. Alternatively, in this embodiment, the different numbers of protruding parts 3 refer to two protruding parts 3 arranged on the left side and three protruding parts 3 arranged on the right side in the upper jaw, and the different numbers of guide parts 4 they refer to two guide parts 4 arranged on the left side and three guide parts 4 arranged on the right side of the lower jaw.

In an optional embodiment, a length of the protrusion 3 along a mesial-distal direction of the dentition at least partially covers a length of the mesial-distal direction of the teeth of the posterior region. For example, the length of the protruding part 3 along the mesial-distal direction of the dentition covers at least one length of the mesial-distal direction of a tooth in the posterior region. A length of the guide part 4 along a mesial-distal direction of the dentition covers at least partly a length of a mesial-distal direction of the canines. In this embodiment, the projecting part 3 and the guide part 4 formed by this means can not only achieve their interaction and adjust the positional relationship of the upper and lower jaws but also make it comfortable for a patient to wear.

In an optional embodiment, the protruding part 3 and/or the guide part 4 is filled with a padding portion to increase an occlusion intensity. The filling portion, for example, is a polymer resin filled in the protruding part 3 and/or in the guide part 4. The filling portion can fill a hollow portion of the protruding part 3 and/or in the guide part. 4. With the filling portion, during occlusion, the protruding part 3 and

2

the guide part 4 is deformed or a degree of deformation that occurs in the protruding part 3 and the guide part 4 is reduced, so as to avoid affecting the effect of adjusting the positional relationship of the upper and lower jaws.

In an optional embodiment, the projecting part 3 and the guide part 4 are respectively provided with magnets having opposite polarities to stabilize the relative positional relationship of the upper and lower jaws. After the bite of the upper and lower jaws, the protruding part 3 moves to a preset position, and the protruding part 3 and the guiding part 4 can help to stabilize the relative position of the upper and lower jaws by means of the magnetic attraction between magnets having opposite polarities.

In an optional embodiment, the projecting part 3 and the first conchoidal body 1 are integrally formed; and the guide part 4 and the second conchoidal body 2 are integrally formed. Here, the protruding part 3 and the first conchoidal body 1 may be integrally formed by vacuum adsorption or direct three-dimensional printing preparation. The protruding part 4 and the first conchoidal body 2 may be integrally formed by vacuum adsorption or direct three-dimensional printing preparation. Furthermore, the projecting part 3 is in communication with a cavity for accommodating maxillary teeth in the first conchoidal body 1, and the guide part 4 is in communication with a cavity for accommodating mandibular teeth in the second conchoidal body 2. Said otherwise, the protruding part 3 and the guide part 4 are actually hollow structures.

Figure 3 is a schematic diagram illustrating a dental instrument to adjust a positional relationship of the upper and lower jaws in accordance with one embodiment of the present disclosure. Fig. 4 is a schematic diagram illustrating a relative positional relationship of a first conchoidal body and a second conchoidal body in an occlusion state in the dental instrument of Fig. 3. Herein, the numerals of Fig. 3 and Figure 4 identical to those of Figure 1 and Figure 2 represent the same elements that have similar functions. Reference may be made to relevant descriptions of previous embodiments of the present disclosure and no redundant descriptions are made herein.

Referring to Fig. 3 and Fig. 4, the dental instrument 20 for adjusting the positional relationship of the upper and lower jaws in this embodiment differs from the dental instrument 10 for adjusting the positional relationship of the upper and lower jaws in the previous embodiments in that: the second conchoidal body 2 is further provided with a limiting part 5 to limit a relative movement of the projecting part 3 together with the guide part 4, and the interacting contact surfaces are arranged on a mesial surface 51 of the limiting part 5 and at a distal surface 33 of the protruding part 3, respectively, to stabilize the adjusted positional relationship of the upper and lower jaws; when the first conchoidal body 1 and the second conchoidal body 2 interact, the protruding part 3 is located between the limiting part 5 and the guiding part 4.

In an optional embodiment, the interacting contact surfaces arranged between the mesial surface 51 of the limiting part 5 and the distal surface 33 of the protruding part 3 are non-smooth surfaces. As used herein, "non-smooth surface" is one or a combination of two or more of

1

a structure having a matte surface, a structure having protruding points, a structure having a hollow surface, or a structure having a perforated surface.

Referring to Figure 5, Figure 6 and Figure 7, there is shown a dental instrument 30 for adjusting a positional relationship of upper and lower jaws in accordance with one embodiment of the present disclosure, respectively. A concave structure 52 is arranged on the mesial surface 51 of the limiting part 5 and a protruding structure 34 is arranged on the distal surface 33 of the protruding part 3. When the upper and lower jaws bite, the protruding structure 34 engages in the jaw. concave structure 52 so that the mesial surface 51 of the limiting part 5 achieves the limitation to the distal surface 33 of the protruding part 3. In a practical application, the guiding part 4 guides the protruding part 3 until the supporting part 32 is in stable contact with the occlusal surface of the posterior region of the second conchoidal body 2 and the concave structure 52 stably limits the protruding structure 34 in the protruding part 3. In this way, the relative positional relationship of the protruding part 3 and the guide part 4 can be stabilized better. A protruding part 3 is arranged on the first conchoidal body 1, and a guiding part 4 and a limiting part 5 are arranged on the second conchoidal body 2. After the bite of the upper and lower jaws, the protruding part 3 moves to a preset position to allow the holding part 32 to be in stable contact with the occlusal surface of the second conchoidal body 2, and thus the guiding part 4 and limiting part 5 hold together the protruding part 3, thus stabilizing better occlusal relationship.

2

Since the interacting contact surfaces arranged on the mesial surface 31 of the projecting part 3 and on the distal surface 41 of the guide part 4 are smooth surfaces and the interacting contact surfaces arranged on the mesial surface 51 of the limiting part 5 and on the distal surface 33 of the protruding part 3 are non-smooth surfaces, when the guiding part 4 guides the protruding part 3 to an occlusal position, the limiting part 5 increases a friction effect with the protruding part 3 to prevent the protruding part 3 from protruding part 3 slides out of the occlusal position, and the guiding part 4 and limiting part 5 cooperate to act on the protruding part 3 to better stabilize the occlusal relationship.

In an optional embodiment, the protruding part 3 and the limiting part 5 are internally provided, respectively, with magnets having the same polarity to induce adjustment of the positional relationship of the upper and lower jaws. When the first conchoidal body 1 and the second conchoidal body 2 interact, the magnets having the same polarity in the protruding part 3 and limiting part 5 can push the protruding part 3 to move along the mesial or enabling the protruding part 3 to have a tendency to move along the mesial direction, thereby further increasing the effect of guiding the lower jaw forward by the first conchoidal body 1 and the second conchoidal body 2. At present document, the magnet may be attached or fixedly attached to the protruding part 3, and the magnets may be arranged on the interacting surface of the protruding part 3 or limiting part 5, or filled in the protruding part 3 and the limiting part 5.

In an optional embodiment, the protruding part 3 and the guiding part 4 they are internally provided respectively with magnets having opposite polarities to stabilize the relative positional relationship of the upper and lower jaws, and the limiting part 5 is internally provided with a magnet having the same polarity as the magnet in the protruding part 3. When the the first conchoidal body 1 and the second conchoidal body 2 interact, the magnets having opposite polarities in the protruding part 3 and the guiding part 4 can guide the first conchoidal body 1 and the second conchoidal body 2 to an appropriate position, and the magnets having the same polarity in the protruding part 3 and limiting part 5 can push the protruding part 3 to move along the mesial direction or enable the protruding part 3 to have a tendency to move along the the mesial direction, thus further increasing the effect of guiding the lower jaw forward by the first conchoidal body 1 and the s second conchoidal body 2.

As previously described, the dental instruments 10, 20 and 30 for adjusting the positional relationship of the upper and lower jaws provided by the present disclosure, which are mainly applied to Angle class II cases, by opening the occlusion of the teeth hindquarters and thus guide the lower jaw to move forward.

Also, the present disclosure further provides other dental instruments 40, 50 and 60 for adjusting a positional relationship of the upper and lower jaws (as shown in Figure 8 to Figure 11), which are mainly applicable to Class III cases. de Angle by opening the occlusion of the back teeth and guiding the lower jaw to move forward.

Figure 8 is a local schematic diagram illustrating a relationship

4

relative positional relationship of a first conchoidal body and a second conchoidal body in an occlusion state in a dental instrument for adjusting a positional relationship of upper and lower jaws according to one embodiment of the present disclosure. The numerals in Figure 8 that are the same as those in Figure 1 and Figure 2 represent the same elements having similar functions. Reference may be made to the relevant descriptions of the above embodiments of the present disclosure and no redundant descriptions are made herein.

Referring to Fig. 8, it shows a dental instrument 40 for adjusting a positional relationship of upper and lower jaws in accordance with another embodiment of the present disclosure. The dental instrument 40 includes a first conchoidal body 1 to accommodate the maxillary teeth and a second conchoidal body 2 to accommodate the mandibular teeth. A projecting part 6 for inducing adjustment of the positional relationship of the upper and lower jaws is arranged convexly towards an opposite jaw at a position of an occlusal surface of a posterior region of the first conchoidal body 1, and a guiding part 7 for guiding the protruding part 6 for making the positional relationship of the upper and lower jaws normal is arranged at a position of an occlusal surface of the second conchoidal body 2. A distal surface 61 of the protruding part 6 and a mesial surface 71 of the protruding part 6 guide rails 7 are respectively provided with interacting contact surfaces to induce adjustment of the positional relationship of the upper and lower jaws; and a holding part 62 in stable contact with the second conchoidal body is arranged at a position of the protruding part 6 facing towards the occlusal surface of the opposite jaw.

When the first conchoidal body 1 and the second conchoidal body 2 interact, the mesial surface 71 of the guide part 7 guides the distal surface 61 of the protruding part 6 to move, and meanwhile, the protruding part 6 moves at a preset position to enable the supporting part 62 to be in stable contact with the occlusal surface of the second conchoidal body 2.

In an optional embodiment, the interacting contact surfaces arranged on the distal surface 61 of the projecting part 6 and on the mesial surface 71 of the guide part 7, respectively, are in smooth contact. When a patient uses the dental instrument 40 to adjust the positional relationship of the upper and lower jaws and bites down, the protrusion 6 can be guided to move to a preset position through the smooth contacting interacting surfaces. Herein, the distal surface 61 of the protruding part 6 and the mesial surface 71 of the guide part 7, for example, are smooth planes, smooth curved surfaces, or smooth inclined surfaces. Interactive contact of smooth planes, curved surfaces, or inclined surfaces forms the previous smooth contact.

In an optional embodiment, the interacting contact surfaces arranged on the distal surface 61 of the projecting part 6 and on the mesial surface 71 of the guide part 7, respectively, are in non-smooth contact. The contact surfaces in non-smooth contact are a frictional structure, a concave-convex pairing structure or a surface patterned structure or the like. When a patient uses the dental instrument 40 to adjust the positional relationship of the upper and lower jaws and bites down, the protruding part 6 can be guided to move into a position established through the interacting surfaces in non-smooth contact and without relative movement. Herein, the distal surface 61 of the projecting part 6 and the mesial surface 71 of the guide part 7, for example, are non-smooth planes, non-smooth curved surfaces, or non-smooth inclined surfaces. Interactive contact of non-smooth planes, curved surfaces, or inclined surfaces forms the previous non-smooth contact.

In an optional embodiment, the structure of the supporting part 62 arranged at a position of the protruding part 6 facing towards an occlusal surface of the opposite jaw is a concave-convex structure, which has the same anatomical characteristics as an occlusal surface of the jaw. posterior region of the second conchoidal body 2. When the first conchoidal body 1 and the second conchoidal body 2 interact, since the concave-convex structure of the surface of the supporting part 62 on the protruding part 6 has the same anatomical characteristics as the occlusal surface of the posterior region of the second conchoidal body 2, the supporting part 62 forms a concave-convex structure protruding in the same direction upon contact with the posterior region of the second conchoidal body 2, thus achieving a closer combination. As an alternative, the structure of the supporting part 62 arranged convexly at a position of the projecting part 6 towards an occlusal surface of the opposite jaw is formed by extending the anatomical features of the occlusal surface of the posterior region of the conchoidal body 1 towards the jaw. opposite. When the first conchoidal body 1 and the second conchoidal body 2 interact, since the concave-convex structure of the surface of the supporting part 62 on the protruding part 6 has the same anatomical characteristics as the

7

occlusal surface of the posterior region of the first conchoidal body 1, the holding part 62 forms a concave-convex structure protruding in different directions upon contact with the posterior region of the second conchoidal body 2, that is, the concave-convex structure formed by extending towards the opposite jaw and the posterior region of the second conchoidal body 2 form a concave-convex occlusal structure in stable cusp-fossa cooperation, thus achieving a closer combination. In the present document, the anatomical features of the occlusal surface refer to a concave-convex structure formed by cusps, pits and fissures on the dental occlusal surface.

In an optional embodiment, the structure of the holder part 62 may also be one or a combination of two or more of a structure having a matte surface, a structure having raised points, a structure having a hollow surface, or a structure having a perforated surface. The addition of a plurality of structures to increase the frictional force on the abutment part 62 can help to enable the abutment part 62 to be in stable contact with the occlusal surface of the second conchoidal body 2 when the upper and lower jaws bite, preventing thus a correction error resulting from a relative movement of the projecting part and the guiding part.

In an optional embodiment, a stiffness of the projecting part 6 is greater than a stiffness of a region of the first conchoidal body 1 to accommodate maxillary teeth; and a stiffness of the guide part 7 is greater than a stiffness of a region of the second conchoidal body 2 to accommodate the mandibular teeth. Also, the protruding part 6 is different from the region of the first conchoidal body 1 to accommodate the maxillary teeth in at least one of thickness, hardness, material and number of layers; the guide part 7 is different from the second conchoidal body region 2 to accommodate the mandibular teeth by at least one of thickness, hardness, material and number of layers. When the protruding part 6 and the guide part 7 are protruding cavitations, they may be easily deformed due to their interaction, thus having an impact on the correction effect. In this case, the stiffnesses of the projecting part 6 and the guide part 7 can be increased to effectively prevent deformations resulting from their interactions.

Additionally, a hardness and/or a modulus of elasticity of the supporting part 62 in the protruding part 6 is higher than a hardness and/or a modulus of elasticity of the region of the first conchoidal body 1 for accommodating the maxillary teeth. Since the protruding part 6 is arranged on the occlusal surface of the first conchoidal body 1 and the holding part 62 can be easily deformed or broken under the action of a biting force upon contact with the second conchoidal body 2, the hardness and / or the modulus of elasticity of the supporting part 62 can be increased to effectively prevent the occurrence of the above phenomenon.

In the present disclosure, various physical parameters of the protruding part 6 and the supporting part 62 can be adjusted to help prolong the service life of the protruding part 6 and the supporting part 62, thereby reducing their wear.

In an optional embodiment, a plurality of projecting parts 6 are arranged on the first conchoidal body 1 and a plurality of parts of guide 7 are arranged on the second conchoidal body 2, here the plurality of projecting parts 6 are in one-to-one correspondence with the plurality of guide parts 7. The plurality of projecting parts 6 and the guide parts 7 interact to induce the adjustment of the positional relationship of the upper and lower jaws to be normal. In a specific embodiment, two protruding parts 6 and two guiding parts 7 are arranged, here, two protruding parts 6 are arranged in a left posterior region and a right posterior region of the first conchoidal body 1, respectively, and two guiding parts 7 they are correspondingly arranged in a left posterior region and a right posterior region of the second conchoidal body 2, respectively. It is noted that, when a plurality of protruding parts 6 and guiding parts 7 are provided, the plurality of protruding parts 6 must be distributed in a left tooth region and a right tooth region of the first conchoidal body 1 at the same time, and meanwhile, the plurality of guide parts 7 should be distributed in a left dental region and a right dental region of the second conchoidal body 2.

The plurality of protruding parts 6 and guide parts 7 interact to induce adjustment of the positional relationship of the upper and lower jaws to be normal. The interaction of the plurality of protruding parts 6 and guiding parts 7 can produce a stronger actuating force, so that the first conchoidal body 1 and the second conchoidal body 2 can better adjust the positional relationship of the upper and lower jaws. to make it normal. Specifically, for example, two protruding parts 6 are respectively arranged on the left and right cheek sides of the first conchoidal body 1 and two guide parts 7 are arranged

4

respectively on the left and right cheek sides of the second conchoidal body 2. With the left side as an example, a front protruding part and a rear protruding part are arranged on the left side of the first conchoidal body 1, and a front guide part and a rear guide part are arranged with the left side of the second conchoidal body 2. At this time, the front protruding part is arranged between a front limiting part and a rear limiting part, and the front protruding part may or may not be in contact with the front limiting part. When the front protruding part is not in contact with the front limiting part, a mesial surface of the front protruding part is not in contact with a distal surface of the front limiting part, that is, there is a particular distance between them; when the front protruding part is in contact with the front limiting part, that is, the mesial surface of the front protruding part is in contact with the distal surface of the front limiting part, there is no distance between them.

In other embodiments, different numbers of protruding parts 6 are provided on the occlusal surfaces of the posterior regions on both sides of the first conchoidal body 1 respectively (not shown), and correspondingly, different numbers of guide parts 7 are also provided on the surfaces. occlusal parts of both sides of the second conchoidal body 2 (not shown) respectively. The different numbers of protruding parts 6 and guiding parts 7 interact to induce adjustment of the positional relationship of the upper and lower jaws to be normal. For example, in this embodiment, the different numbers of protruding parts 6 refer to two protruding parts 6 respectively arranged on the left and right sides of the upper jaw, and the different numbers of guide parts 7 refer to three guide parts 7 respectively arranged on the left and right sides of the lower jaw. Alternatively, in this embodiment, the different numbers of protruding parts 6 refer to two protruding parts 6 arranged on the left side and three protruding parts 6 arranged on the right side in the upper jaw, and the different numbers of guide parts 7 they refer to two guide parts 7 arranged on the left side and three guide parts 7 arranged on the right side of the lower jaw.

In an optional embodiment, a length of the protruding part 6 along a mesial-distal direction of the dentition at least partially covers a length of the mesial-distal direction of the teeth of the posterior region. For example, the length of the protruding part 6 along the mesial-distal direction of the dentition covers at least one length of the mesial-distal direction of a tooth in the posterior region. A length of the guide part 7 along a mesial-distal direction of the dentition covers at least partly a length of a mesial-distal direction of the canines. In this way, the projecting part 6 and the guide part 7 formed by this means can not only achieve their interaction and adjust the positional relationship of the upper and lower jaws but also make it comfortable for a patient to wear.

In an optional embodiment, the protruding part 6 and/or the guide part 7 is filled with a padding portion to increase an occlusion intensity. The filling portion, for example, is a polymer resin filled in the protruding part 6 and/or in the guide part 7. The filling portion can fill a hollow portion of the protruding part 6 and/or in the guide part. 7. With the filling portion, during occlusion, the protruding part 6 and the guide part 7 are prevented from being deformed or a degree of deformation that occurs in the protruding part 6 and the guide part 7 is reduced, so as to avoid affecting the effect of adjusting the positional relationship of the upper and lower jaws.

In an optional embodiment, the projecting part 6 and the guide part 7 are respectively provided with magnets having opposite polarities to stabilize the relative positional relationship of the upper and lower jaws. After the upper and lower jaws bite, the protruding part 6 moves to a preset position, and the protruding part 6 and the guiding part 7 can help to stabilize the relative position of the upper and lower jaws by attracting magnetic between magnets that have opposite polarities.

In an optional embodiment, the projecting part 6 and the first conchoidal body 1 are integrally formed; and the guide part 7 and the second conchoidal body 2 are integrally formed. The protruding part 6 and the first conchoidal body 1 may be integrally formed by vacuum adsorption or direct three-dimensional printing preparation. The protruding part 7 and the first conchoidal body 2 may be integrally formed by vacuum adsorption or direct three-dimensional impression preparation. Furthermore, the projecting part 6 is in communication with a cavity for accommodating maxillary teeth in the first conchoidal body 1, and the guide part 7 is in communication with a cavity for accommodating mandibular teeth in the second conchoidal body 2. Said otherwise, the projecting part 6 and the guiding part 7 are actually hollow structures.

4

Fig. 9 is a schematic diagram illustrating a relative positional relationship of a first conchoidal body and a second conchoidal body in an occlusion state in a dental instrument for adjusting a positional relationship of upper and lower jaws in accordance with one embodiment of Fig. present disclosure. The numerals in Figure 9 that are the same as those in Figure 8 represent the same elements that have similar functions. Reference may be made to relevant descriptions of previous embodiments of the present disclosure and no redundant descriptions are made herein.

Referring to Fig. 9, a dental instrument 50 for adjusting a positional relationship of the upper and lower jaws in accordance with another embodiment of the present disclosure is shown and differs from the dental instrument 40 for adjusting the positional relationship of the upper and lower jaws. described above in that: the second conchoidal body 2 is further provided with a limiting part 8 for limiting a relative movement of the projecting part 6 together with the guide part 7, and the interacting contact surfaces are arranged on a distal surface 81 of the limiting part 8 and on a mesial surface 63 of the protruding part 6, respectively, to stabilize the adjusted positional relationship of the upper and lower jaws; when the first conchoidal body 1 and the second conchoidal body 2 interact, the protruding part 6 is located between the limiting part 8 and the guiding part 7.

In an optional embodiment, the interacting contact surfaces arranged between the distal surface 81 of the limiting part 8 and the mesial surface 63 of the protruding part 6 are non-smooth surfaces. In the present document, "non-smooth surface" is one or a combination of two or more of a structure having a matte surface, a structure having raised points, a structure having a hollow surface, or a structure having a perforated surface.

Referring to Figure 10 and Figure 11, there is shown a dental instrument 60 for adjusting a positional relationship of upper and lower jaws in accordance with one embodiment of the present disclosure. A concave structure 82 is arranged on the distal surface 81 of the limiting part 8 and a protruding structure 64 is arranged on the mesial surface 63 of the protruding part 6. When the upper and lower jaws bite, the protruding structure 64 engages in the jaw. concave structure 82 so that the distal surface 81 of the limiting part 8 achieves the limitation to the mesial surface 63 of the protruding part 6. In a practical application, the guiding part 7 guides the protruding part 6 until the supporting part 62 is in stable contact with the occlusal surface of the posterior region of the second conchoidal body 2 and the concave structure 82 stably limits the protruding structure 64 in the protruding part 6. In this way, the relative positional relationship of the protruding part 6 and the guide part 7 can be stabilized better. A protruding part 6 is arranged on the first conchoidal body 1, and a guiding part 7 and a limiting part 8 are arranged on the second conchoidal body 2. After the bite of the upper and lower jaws, the protruding part 6 moves to a preset position to allow the holding part 62 to be in stable contact with the occlusal surface of the second conchoidal body 2, and thus the guiding part 7 and limiting part 8 hold together the protruding part 6, stabilizing

4

thus better the occlusal relationship.

Since the interacting contact surfaces on the distal surface 61 of the projecting part 6 and on the mesial surface 71 of the guide part 7 are smooth surfaces and the interacting contact surfaces on the distal surface 81 of the limiting part 8 and on the mesial surface 63 of the protruding part 6 are non-smooth surfaces, when the guiding part 7 guides the protruding part 6 to an occlusal position, the limiting part 8 increases a friction effect with the protruding part 6 to prevent the protruding part from 6 slides out of the occlusal position, and the guiding part 7 and the limiting part 8 cooperate to act on the protruding part 6 to better stabilize the occlusal relationship.

In an optional embodiment, the protruding part 6 and the limiting part 8 are internally provided, respectively, with magnets having the same polarity to induce adjustment of the positional relationship of the upper and lower jaws. When the first conchoidal body 1 and the second conchoidal body 2 interact, the magnets having the same polarity in the protruding part 6 and in the limiting part 8 can push the protruding part 6 to move along a mesial or a mesial direction. enable the protruding part 6 to have a tendency to move along the mesial direction, thereby further increasing the effect of guiding the lower jaw forward by the first conchoidal body 1 and the second conchoidal body 2. The magnet can be attached or fixedly attached to the protruding part 6, and the magnets may be arranged on the interacting surfaces of the protruding part 6 or limiting part 8, or filled in the protruding part 6 and limiting part 8.

4

In an optional embodiment, the protruding part 6 and the guide part 7 are respectively internally provided with magnets having opposite polarities to stabilize the relative positional relationship of the upper and lower jaws, and the limiting part 8 is internally provided with a magnet that has the same polarity as the protruding part 6. When the first conchoidal body 1 and the second conchoidal body 2 interact, the magnets having opposite polarities in the protruding part 6 and the guide part 7 can guide the first conchoidal body 1 and the second conchoidal body 2 to a proper position, and the magnets having the same polarity in the protruding part 6 and limiting part 8 can push the protruding part 6 to move along the mesial direction or enable the protruding part 6 has a tendency to move along the mesial direction, thereby further increasing the effect of guiding the jaw a inferior forwards by the first conchoidal body 1 and the second conchoidal body 2.

In one embodiment, the present disclosure further provides a dental orthodontic system, including multiple sets of dental instruments for adjusting a positional relationship of the upper and lower jaws, including at least one set of dental instruments 10, 20, 30, 40, 50 and/or 60 to set a positional relationship of the upper and lower jaws as mentioned above. The multiple sets of dental instruments 10, 20, 30, 40, 50 and/or 60 for adjusting the positional relationship of the upper and lower jaws are geometrically shaped to gradually reposition the teeth from an initial position to a target correction position.

In an optional embodiment, in different sets of instruments teeth for adjusting the positional relationship of the upper and lower jaws, a height at which a protruding part 3 arranged protrudes towards an opposite jaw and a height at which a guide part 4 arranged protrudes towards an opposite jaw gradually become smaller in conjunction with an orthodontic process. As an alternative, in different sets of dental instruments for adjusting the positional relationship of the upper and lower jaws, a height at which a protruding portion 6 provided protrudes toward an opposite jaw and a height at which a guide portion 7 provided protrudes toward an opposing jaw are gradually made smaller in conjunction with an orthodontic process.

Specifically, with orthodontics for teeth through three orthodontic phases as an example, different dental instruments are used for dental orthodontics in different phases. For example, the dental instrument used in a second orthodontic phase is a dental instrument used after a first orthodontic phase, and the dental instrument used in a third orthodontic phase is a dental instrument used after the second orthodontic phase. The dental instruments used in the orthodontic phases differ in that: the height at which the protruding part 3 or 6 arranged in the dental instrument used in the second orthodontic phase protrudes towards the opposite jaw is less than the height at which the protruding part 3 or 6 provided in the dental instrument used in the first orthodontic stage protrudes toward the opposite jaw, and the height at which the protruding part 3 or 6 provided in the dental instrument used in the third orthodontic stage protrudes toward the opposite jaw is less than the height at which the protruding part 3 or 6 arranged in the dental instrument used in the phase of orthodontic correction

4

protrudes into opposite jaw. Evidently, during dental orthodontics, a patient is required to wear a series of conchoidal dental instruments for orthodontics, here, the series of conchoidal dental instruments have a ruler of geometric shape referred to in the above examples. The above descriptions refer to how to adjust the positional relationship of the upper and lower jaws. In this way, the relationship between the jaws can be adjusted and orthodontics for maloccluded teeth can be performed at the same time, thus achieving the orthopedic and orthodontic process synchronously. A set of conchoidal dental instruments can be used for 7 to 14 days, and a series of conchoidal dental instruments are provided according to different types of cases and complexities of patients, so as to achieve the correction effect.

In conclusion, in the dental instrument for adjusting the positional relationship of the upper and lower jaws and in the dental orthodontic system thereof of the present disclosure, the interacting protruding jaw pads (corresponding to the protruding part and the guiding part) are arranged in the upper and lower jaws to open the occlusion and induce the lower jaw to protrude or retrude. A supporting structure arranged on the occlusal surface of the jaw pad of the upper jaw is used to increase friction and stabilize the relative positional relationship of the upper and lower jaws, in order to achieve the purpose of restricting the lower jaw from being in a protrusive position or in a retrusive position while having a relatively stable occlusal relationship. Good treatment effect is produced especially for Angle class II and III cases with depth of curve of Spee greater than 3mm.

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In one embodiment, the present disclosure further provides a method of designing a dental instrument for adjusting a positional relationship of the upper and lower jaws, which is applied to obtain the first conchoidal dental instrument and the second conchoidal dental instrument described above.

Fig. 12 is a flowchart illustrating a design method of a dental instrument for adjusting a positional relationship of upper and lower jaws in accordance with one embodiment of the present disclosure.

Referring to Figure 12, the method of designing the dental instrument for adjusting the positional relationship of the upper and lower jaws in accordance with the present disclosure includes the steps of:

51, obtain a first initial digital dental-jaw model;

52, designing a protruding part model on an occlusal surface of a posterior region of the initial first digital dental-jaw model, specifically including: obtaining characteristic information of a protruding part; herein, the feature information of the protruding part includes a preset size and position of the protruding part, and an occlusal surface of the protruding part facing the teeth of an opposing jaw is matched with an occlusal surface of a region posterior of teeth of opposite jaw concave-convex or even with occlusal surface of posterior region of teeth of opposite jaw in bite-like shape;

53, generating a first digital dental-jaw model having the protrusion based on the initial first digital dental-jaw model and the protruding part model;

54, to design a first conchoidal dental instrument based on the first digital dental-jaw model, so that the first conchoidal dental instrument is a shell having a cavity for accommodating a first dentition, a posterior region of the first conchoidal dental instrument has the part protruding protruding toward the opposite jaw, and the protruding part includes a mesial surface and a distal surface of the protruding part;

55, obtain a second initial dental-jaw digital model;

56, designing a guide part model on an occlusal surface of the initial second dental-jaw digital model, specifically including: obtaining feature information of a guide part; herein, the guide part feature information includes a preset size and position of the guide part;

57, generating a second dental-jaw digital model having the guide part based on the initial second dental-jaw digital model and the guide part model;

58, designing a second conchoidal dental instrument based on the second digital dental-jaw model, so that the second conchoidal dental instrument is a shell having a cavity for accommodating a second dentition, the second conchoidal dental instrument has the guide portion that cooperates with the protruding part of the first conchoidal dental instrument, and the guide part includes a mesial surface and a distal surface of the guide part;

herein, the first conchoidal dental instrument and the second conchoidal dental instrument, respectively, are the first conchoidal body for accommodating maxillary teeth and the second conchoidal body

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to accommodate the mandibular teeth as mentioned above; when the first conchoidal body and the second conchoidal body interact, the guide part guides the protruding part to move, and meanwhile, the protruding part moves to a preset position to enable the holding part to be in stable contact with the occlusal surface of the second conchoidal body.

It is noted that, steps S1 to S4 may be performed in synchronization with steps S5 to S8, or steps S5 to S8 may be performed before steps S1 to S4. In other words, in the present disclosure, there is no design sequence limitation for the design of the first conchoidal dental instrument and the second conchoidal dental instrument.

In an optional embodiment, the distal surface of the guide part guides the mesial surface of the protruding part to move to induce the lower jaw to protrude, thus achieving effective treatment for Angle class II cases.

In an optional embodiment, the mesial surface of the guide portion guides the distal surface of the protruding portion to move to induce the lower jaw to retrude, thus achieving effective treatment for Angle class III cases.

In an optional embodiment, the above design method further includes: step S9. In step S9, designing the second conchoidal dental instrument based on the second digital dental-jaw model further includes a step of designing a limiting part, so that the designed dental instrument limits the relative movement of the protruding part by means of the limiting part and guide part, herein, the limiting part includes a

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mesial surface and a distal surface of the limiting part.

In an optional embodiment, the interacting contact surfaces disposed on the mesial surface of the limiting part and on the distal surface of the protruding part to stabilize the adjusted positional relationship of the upper and lower jaws, so as to induce the lower jaw to move. protrudes, thus achieving an effective treatment for Angle class II cases.

In an optional embodiment, the interacting contact surfaces disposed on the distal surface of the limiting part and on the mesial surface of the protruding part to stabilize the adjusted positional relationship of the upper and lower jaws, so as to induce the lower jaw to move. retrudes, thus achieving an effective treatment for Angle class III cases.

In one embodiment, the present disclosure further provides a preparation method of a dental instrument for adjusting a positional relationship of upper and lower jaws, whereby the designed dental instrument based on the above design method is correspondingly manufactured. The preparation method includes: a hot-press molding preparation method or a direct three-dimensional printing method.

In one embodiment, a preparation module in the preparation method may be an additive preparation machine for preparing the conchoidal dental instrument based on the additive preparation technology, that is, the digital finite element model of the obtained conchoidal dental instrument. that satisfies the requirements is printed directly on a conchoidal dental instrument based on 3D printing technology, where the 3D printing technology may be a stereo lithography apparatus (SLA, stereo lithography apparatus) or digital light projection (DLP).

In another embodiment, the preparation method in the preparation method may be a 3D printing device, a film pressing device, a cutting device, a polishing device, and a cleaning and sterilization device. The specific preparation process is as follows: first, print a digital finite element model of the dental jaw digital model that meets the requirements directly based on 3D printing technology, and then perform film pressing operation on the dental model - 3D printed jaw and, finally, performing cutting, polishing, cleaning and sterilization and the like for the film-pressed conchoidal dental instrument to obtain the conchoidal dental instrument.

Although the foregoing describes the embodiments of the present disclosure in detail, it is apparent that various changes and modifications to these embodiments may be made by those skilled in the art. However, it is to be understood that such changes and modifications are all within the scope of protection of the present disclosure as claimed in the appended claims. Also, the present disclosure described herein may have other embodiments and may be implemented or performed in multiple ways.

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Claims (31)

1. A dental instrument for setting a positional relationship of the upper and lower jaws, comprising a first conchoidal body for accommodating maxillary teeth and a second conchoidal body for accommodating mandibular teeth; wherein a projecting part for inducing adjustment of the positional relationship of the upper and lower jaws is arranged convexly toward an opposite jaw at a position of an occlusal surface of a posterior region of the first conchoidal body; wherein a guide part for guiding the protruding part to make the positional relationship of the upper and lower jaws normal is arranged at a position of an occlusal surface of the second conchoidal body; wherein a mesial surface of the projecting part and a distal surface of the guide part are respectively provided with interacting contact surfaces to induce adjustment of the positional relationship of the upper and lower jaws; and a holding part in stable contact with the second conchoidal body is arranged at a position of the protruding part facing towards an occlusal surface of the opposite jaw; Y wherein when the first conchoidal body and the second conchoidal body interact, the distal surface of the guide part guides the mesial surface of the protruding part to move, meanwhile the protruding part moves to a preset position to enable the protruding part to move. resting pad is in stable contact with the occlusal surface of the second conchoidal body. The dental instrument for adjusting the positional relationship of the upper and lower jaws according to claim 1, wherein the interacting contact surfaces provided on the mesial surface of the protruding part and on the distal surface of the guide part, respectively, they are in smooth contact or in non-smooth contact. 3. The dental instrument for adjusting the positional relationship of the upper and lower jaws according to claim 1, wherein a supporting part structure is a concave-convex structure having the same anatomical features as an occlusal surface of a jaw. posterior region of second conchoidal body; or, the structure of the supporting part is a concave-convex structure formed by extending an anatomical feature of the occlusal surface of the posterior region of the first conchoidal body toward the opposite jaw. The dental instrument for adjusting the positional relationship of the upper and lower jaws according to claim 1, wherein a structure of the supporting part is one or a combination of two or more of a structure having a matte surface, a structure having protruding points, a structure having a hollow surface, or a structure having a perforated surface. The dental instrument for adjusting the positional relationship of the upper and lower jaws according to claim 1, wherein a stiffness of the projecting part is greater than a stiffness of a region of the first body conchoidal to accommodate maxillary teeth; and a stiffness of the guide part is greater than a stiffness of a region of the second conchoidal body to accommodate the mandibular teeth. 6. The dental instrument for adjusting the positional relationship of the upper and lower jaws according to claim 5, wherein the protruding part is different from the region of the first conchoidal body to accommodate the maxillary teeth by at least one thickness, hardness , material and number of layers; and the guide portion is different from the second conchoidal body region to accommodate the mandibular teeth by at least one of thickness, hardness, material, and number of layers. The dental instrument for adjusting the positional relationship of the upper and lower jaws according to claim 1, wherein a hardness and/or a modulus of elasticity of the supporting part in the protruding part is greater than a hardness and/or a or a modulus of elasticity of the region of the first conchoidal body to accommodate the maxillary teeth. The dental instrument for adjusting the positional relationship of the upper and lower jaws according to claim 1, wherein a limiting part for limiting a relative movement of the protruding part together with the guide part is further provided on the second body conchoidal, a mesial surface of the limiting part and the distal surface of the protruding part are respectively provided with interacting contact surfaces to stabilize a close positional relationship of the jaws 7 upper and lower; when the first conchoidal body and the second conchoidal body interact, the protruding part is located between the guiding part and the limiting part. The dental instrument for adjusting the positional relationship of the upper and lower jaws according to claim 8, wherein the interacting contact surfaces arranged on the mesial surface of the limiting part and on the distal surface of the protruding part, respectively They are not smooth surfaces. The dental instrument for adjusting the positional relationship of the upper and lower jaws according to claim 9, wherein the non-smooth surface is one or a combination of two or more of a structure having a matte surface, a structure that has protruding points, a structure that has a hollow surface, or a structure that has a perforated surface. 11. The dental instrument for adjusting the positional relationship of the upper and lower jaws according to claim 9, wherein the protruding part and the limiting part are respectively internally provided with magnets having the same polarity to induce the adjustment of the relationship. positional of the upper and lower jaws; or, the protruding part and the guide part are internally provided, respectively, with magnets having opposite polarities to stabilize a relative positional relationship of the upper and lower jaws, and the limiting part is internally provided with a magnet having the same polarity as the magnet in the protruding part. The dental instrument for adjusting the positional relationship of the upper and lower jaws according to claim 1, wherein the first conchoidal body is provided with a plurality of protruding parts, the second conchoidal body is provided with a plurality of protruding parts. guide interacting with the protruding portions, and the plurality of the protruding portions and the guiding portions interact to induce adjustment of the positional relationship of the upper and lower jaws to be normal. The dental instrument for adjusting the positional relationship of the upper and lower jaws according to claim 1, wherein a length of the protruding part along a mesial-distal direction of the dentition at least partially covers a length of a mesial-distal direction of the teeth of the posterior region; and a length of the guide part along the mesial-distal direction of the dentition at least partially covers a length of a mesial-distal direction of the canines. The dental instrument for adjusting the positional relationship of the upper and lower jaws according to claim 1, wherein the protruding part and/or the guiding part is filled with a filling portion to increase an occlusion intensity. 15. The dental instrument for adjusting the positional relationship of the upper and lower jaws according to claim 1, wherein the part The protruding portion and the guide portion are respectively provided with magnets having opposite polarities to stabilize a relative positional relationship of the upper and lower jaws. The dental instrument for adjusting the positional relationship of the upper and lower jaws according to claim 1, wherein the protruding part and the first conchoidal body are integrally formed; and the guide part and the second conchoidal body are integrally formed. 17. A dental instrument for adjusting a positional relationship of the upper and lower jaws, comprising a first conchoidal body for accommodating maxillary teeth and a second conchoidal body for accommodating mandibular teeth; wherein a projecting part for inducing adjustment of the positional relationship of the upper and lower jaws is arranged convexly toward an opposite jaw at a position of an occlusal surface of a posterior region of the first conchoidal body; wherein a guide part for guiding the protruding part to make the positional relationship of the upper and lower jaws normal is arranged at a position of an occlusal surface of the second conchoidal body; wherein a distal surface of the projecting part and a mesial surface of the guide part are respectively provided with interacting contact surfaces to induce adjustment of the adjusted positional relationship of the upper and lower jaws; and a holding part in stable contact with the second conchoidal body is arranged at a position of the part protruding toward occlusal surface of opposite jaw; wherein when the first conchoidal body and the second conchoidal body interact, the mesial surface of the guide part guides the distal surface of the protruding part to move, meanwhile the protruding part moves to a preset position to enable the protruding part to move. resting pad is in stable contact with the occlusal surface of the second conchoidal body. The dental instrument for adjusting the positional relationship of the upper and lower jaws according to claim 17, wherein the interacting contact surfaces provided on the distal surface of the protruding part and the mesial surface of the guide part, respectively , are in smooth contact or in non-smooth contact. 19. The dental instrument for adjusting the positional relationship of the upper and lower jaws according to claim 17, wherein a structure of the supporting part is a concave-convex structure having the same anatomical features as an occlusal surface of the jaw. posterior region of second conchoidal body; or, the structure of the supporting part is a concave-convex structure formed by extending an anatomical feature of the occlusal surface of the posterior region of the first conchoidal body toward the opposite jaw. The dental instrument for adjusting the positional relationship of the upper and lower jaws according to claim 17, wherein a stiffness of the projecting part is greater than a stiffness of a region of the first body 1 conchoidal to accommodate maxillary teeth; and a stiffness of the guide part is greater than a stiffness of a region of the second conchoidal body to accommodate the mandibular teeth. 21. The dental instrument for adjusting the positional relationship of the upper and lower jaws according to claim 20, wherein the protruding part is different from the region of the first conchoidal body to accommodate the maxillary teeth by at least one of thickness, hardness , material and number of layers; and the guide portion is different from the second conchoidal body region to accommodate the mandibular teeth by at least one of thickness, hardness, material, and number of layers. The dental instrument for adjusting the positional relationship of the upper and lower jaws according to claim 17, wherein a hardness and/or a modulus of elasticity of the supporting part in the protruding part is greater than a hardness and/or a or a modulus of elasticity of the region of the first conchoidal body to accommodate the maxillary teeth. The dental instrument for adjusting the positional relationship of the upper and lower jaws according to claim 17, wherein a limiting part for limiting a relative movement of the protruding part together with the guide part is further provided on the second body conchoidal, a distal surface of the limiting part and the mesial surface of the protruding part are respectively provided with interacting contact surfaces to stabilize a close positional relationship of the jaws 2 upper and lower; and when the first conchoidal body and the second conchoidal body interact, the protruding part is located between the guiding part and the limiting part. The dental instrument for adjusting the positional relationship of the upper and lower jaws according to claim 23, wherein the interacting contact surfaces provided on the distal surface of the limiting part and on the mesial surface of the protruding part, respectively They are not smooth surfaces. The dental instrument for adjusting the positional relationship of the upper and lower jaws according to claim 24, wherein the non-smooth surface is one or a combination of two or more of a structure having a matte surface, a structure that has protruding points, a structure that has a hollow surface, or a structure that has a perforated surface. 26. The dental instrument for adjusting the positional relationship of the upper and lower jaws according to claim 23, wherein the protruding part and the limiting part are respectively internally provided with magnets having the same polarity to induce the adjustment of the relationship. positional of the upper and lower jaws; or, the protruding part and the guide part are internally provided, respectively, with magnets having opposite polarities to stabilize a relative positional relationship of the upper and lower jaws, and the limiting part is internally provided with a magnet having the same polarity as the magnet in the protruding part. The dental instrument for adjusting the positional relationship of the upper and lower jaws according to claim 17, wherein the first conchoidal body is provided with a plurality of protruding parts, the second conchoidal body is provided with a plurality of protruding parts. guide interacting with the protruding portions, and the plurality of protruding portions and the guiding portions interact to induce adjustment of the positional relationship of the upper and lower jaws to be normal. 28. The dental instrument for adjusting the positional relationship of the upper and lower jaws according to claim 17, wherein a length of the protruding part along a mesial-distal direction of the dentition at least partially covers a length of the mesial-distal direction of the teeth of the posterior region; and a length of the guide part along a mesial-distal direction of the dentition at least partially covers a length of a mesial-distal direction of the canines. The dental instrument for adjusting the positional relationship of the upper and lower jaws according to claim 17, wherein the protruding part and/or the guiding part is filled with a filling portion to increase an occlusion intensity. 30. The dental instrument for adjusting the positional relationship of the upper and lower jaws according to claim 17, wherein the part 4 The protruding portion and the guide portion are respectively provided with magnets having opposite polarities to stabilize a relative positional relationship of the upper and lower jaws. The dental instrument for adjusting the positional relationship of the upper and lower jaws according to claim 17, wherein the protruding part and the first conchoidal body are integrally formed; and the guide part and the second conchoidal body are integrally formed.