WO2020009385A1 - Denture manufacturing method - Google Patents

Abstract

The present invention is characterized by: modifying a 3D denture model, which is generated by means of obtaining an impression, and thus generating a modified 3D denture model which has a space for inner shape portion; manufacturing a denture outer shape portion having a denture body and artificial teeth on the basis of the modified 3D denture model; and, after manufacturing the denture outer shape portion, applying an inner shape portion material having fluidity on the space for inner shape portion of the denture body, attaching same to the jaws of a person to be treated and thus allowing the inner shape portion material to be modified in concert with the shape of the jaws of the person to be treated, and then curing the inner shape portion material and thus forming a denture inner shape portion corresponding to the shape of the jaws of the person to be treated.

Description

Denture manufacturing method

The present invention relates to a denture manufacturing method, and more particularly to a denture manufacturing method for producing a denture for replacing the missing teeth.

In general, dentists mainly use dentures and dental implants to treat lost teeth.

Implant is a method of restoring lost teeth by implanting artificial roots in place of the alveolar bone to replace the roots of the missing teeth, and then fixing the artificial teeth to the artificial roots.

The denture is a method of manufacturing the mold according to the shape of the teeth around the lost tooth and installing the artificial tooth in the oral cavity, and installing it in the oral cavity. Unlike the implant, the denture is removable.

Since the denture is worn in close contact with the teeth, the denture mold must be precisely manufactured to precisely fit the oral cavity around the missing tooth.

If the denture shape does not completely match the shape of the oral cavity, the subject feels discomfort or pain and, in severe cases, damages the gums or the remaining surrounding teeth.

The process for making dentures consists of several steps:

First, the impression material is injected into the oral cavity to precisely obtain the impression around the lost tooth. Based on the impressions obtained, a dental model is created to accurately reproduce the shape of the oral cavity.

The denture body is made by using materials (such as composite resin) that will become the body of the denture, and the denture is completed by applying artificial teeth to the position of the missing tooth of the denture body.

The denture produced by the conventional method is determined by the degree of completeness of the denture depending on how precisely to obtain the impression, it is possible to perform the impression taking step in several steps to obtain the impression precisely.

The following steps are taken to raise an impression in order to obtain an impression precisely.

First of all, you get a preliminary impression by putting impression material in a ready-made tray. Based on the preliminary impressions obtained, a special tray corresponding to the tooth form of the subject is manufactured. After that, the impression material is placed in a dedicated tray to obtain a precise final impression that contains all the anatomical information in the mouth of the subject.

If an impression is obtained using only a ready-made tray without producing a dedicated tray, the soft tissue in the oral cavity may be pressed to obtain the necessary anatomical structure when the tray is small, and the soft tissue in the oral cavity may be excessively pulled to obtain the necessary anatomical structure. Deformation is caused.

Therefore, in the conventional method, the overall denture manufacturing process is very long and complicated, such as a preliminary impression taking process for manufacturing a dedicated tray.

In addition, even if the final impression is precisely obtained, it is difficult to precisely shape the shape of the denture body in the process of making a dental model by injecting plaster on the final impression or by attaching a denture material to the dental model. Problems such as deformation of the shape occur.

In this case, the process of trying the finished dentures several times and fine-tuning the dentures must be repeated, which can take weeks to months.

The present invention has been made in order to solve the problems of the prior art as described above, by avoiding the conventional denture manufacturing method must be performed to accurately obtain the impression in the oral cavity to produce a precise dental model, to make a precise impression The present invention proposes an improved method for manufacturing dentures that enables the production of precise dentures without going through the process of obtaining them or making a precise dental model.

In order to solve the above problems, the present invention, after taking the impression corresponding to the tooth shape of the subject, and scanning it to obtain the impression acquisition and 3D denture model that is a three-dimensional three-dimensional shape data set corresponding to the tooth shape of the subject Denture model generation step; A denture model deformation step of generating a deformed 3D denture model in which a space for an internal part is formed by removing a portion corresponding to an impression surface of a subject from the 3D denture model of the denture generated by the impression taking and 3D denture model generation step; A denture outer shape manufacturing step of manufacturing a denture body in which a space for an inner portion is formed based on the deformed 3D denture model generated in the denture model deformation step in real, and producing a denture outer shape by trying an artificial tooth on the denture body; After the denture outer part manufacturing step, by applying a fluid for the inner part of the denture body to the inner space of the denture body and closely adhered to the tooth of the subject to deform the inner material to correspond to the tooth form of the subject A denture inner mold forming step of curing the inner mold material to form a denture inner mold corresponding to the tooth form of the subject; Characterized in that comprises a.

In the above, in the denture inner mold forming step, it is preferable to apply the adhesive material to the inner space of the denture body and then to apply the inner mold material.

In the above, the portion corresponding to the impression surface of the operator in the 3D denture model to remove the thickness of 0.3mm ~ 2mm over the entire surface of the impression surface to generate the modified 3D denture model, the internal material is the denture body It is preferable to apply | coat to the thickness of 0.3 mm-2 mm over the whole space for internal parts of the inside.

In the denture manufacturing method according to the present invention as described above, the precise manufacturing process can be omitted because the precise impression taking and the precision tooth model can be omitted.

Through this manufacturing method, despite the elimination of precise impression acquisition and the creation of the dental model, dentures can be produced precisely corresponding to the tooth form of the subject, and in particular, the impression perfectly matches the detailed form of the gum and palate of the subject. It is easy to make dentures with faces.

1 to 8 is a view showing a denture manufacturing process according to the denture manufacturing method according to an embodiment of the present invention in order.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted for simplicity of explanation, and like reference numerals designate like parts throughout the specification. When any part of the specification is to "include" any component, this means that it may further include other components, except to exclude other components unless otherwise stated.

1 to 8 are diagrams sequentially showing a denture manufacturing process according to a denture manufacturing method according to an embodiment of the present invention.

Denture manufacturing method according to an embodiment of the present invention, impression taking and 3D denture model generation step (S1), denture model deformation step (S2), denture outer shape manufacturing step (S3), denture inner mold forming step (S4) It is made, including.

Impression taking and 3D denture model generation step S1 are performed.

Impression acquisition and 3D denture model generation step (S1) by taking impression materials (21, 22) into the mouth of the subject to obtain a rough impression (impression surface, 21a, 22a) corresponding to the shape of the subject's teeth (11, 12) In addition, the scan is generated to generate 3D denture models 31 and 32 corresponding to the shape of the tooth 11, 12 of the subject.

That is, a step of directly acquiring the shape of the subject's teeth 11 and 12 and scanning the same to form the 3D denture models 31 and 32 corresponding to the dentures 51 and 52 to be performed by the operator on the computer program.

In this step, a ready-made tray is used. Select the ready-made tray suitable for the mouth size of the subject to put the impression material (21, 22) in the tray. Thereafter, the trays containing the impression materials 21 and 22 are inserted into the mouth of the subject to obtain the impressions 21a and 22a.

1 and 2 illustrate the process of taking impressions 21a and 22a using impression materials 21 and 22. Since the process of acquiring the rough impressions 21a and 22a of the subject using a ready-made tray is widely known in the related art, only the oral cavity shape of the subject and the impression materials 21 and 22 are conceptually shown in the drawings.

In this step, since it is not necessary to acquire the precise impression of the subject, it may not use a dedicated tray that corresponds precisely to the shape of the subject's teeth (11, 12).

Thereafter, the impressions 21a and 22a of the acquired operator are scanned to form 3D denture models 31 and 32 corresponding to the dentures 51 and 52 to be treated by the operator. In this embodiment, since it is not necessary to generate a precise 3D denture model, the 3D denture models 31 and 32 can be formed only with the obtained rough impressions 21a and 22a.

The 3D denture models 31 and 32 are not real, but are computer-operated three-dimensional solid data sets.

The 3D denture models 31, 32 formed are shown in FIG. 3. In the 3D denture models 31 and 32, the portions 31a and 32a corresponding to the impression surface of the subject are designed based on the impressions 21a and 22a of the subject obtained using the impression materials 21 and 22. Is designed based on the anatomy of the oral cavity.

After the impression taking and the 3D denture model generation step S1, the denture model deformation step S2 is performed.

The denture model star shape step S2 is a step of manipulating a 3D denture model, which is a three-dimensional solid data set, by a computer.

Denture model deformation step (S2), in the 3D denture model (31, 32) formed as shown in Figure 3 by removing the portions (31a, 32a) corresponding to the impression surface of the subject, the internal space 41a as shown in FIG. , 42a) is a step of generating a deformed 3D denture model (41, 42).

This step takes place on a computer program. In the 3D denture models 31 and 32, the portions 31a and 32a corresponding to the impression surface of the subject are removed to a certain thickness over the entire surface of the impression surface. In this embodiment, it is removed to a thickness of 0.3mm ~ 2mm.

The removed portion becomes the spaces 41a and 42a for the internal parts of the deformed 3D denture models 41 and 42, and the denture bodies 51a and 52a are physically based on the deformed 3D denture models 41 and 42. If it is made of, the part becomes a space for applying the material for the inner mold part 51d, 52d.

Since the 3D denture models 31 and 32 and the deformed 3D denture models 41 and 42 are both generated in the computer program in the impression acquisition and 3D denture model generation step S1 and the denture model deformation step S2, the acquired impression ( It is not necessary to make plaster models or molds based on 21a, 22a).

Therefore, the process is very simple and easy to change the design, it is possible to completely eliminate the error inevitably occurred in the process of manufacturing the plaster model or mold.

After the denture model deformation step S2, the denture outer part manufacturing step S3 is performed.

Denture outer shape manufacturing step (S3) is to make the denture body (51a, 52a) in real based on the deformed 3D denture model (41, 42) as shown in Figure 5, artificial teeth on the produced denture body (51a, 52a) At step 51b and 52b, the denture outline is completed.

In the present embodiment, the denture bodies 51a and 52a are output by using a 3D printer based on the deformed 3D denture models 41 and 42 generated in the denture model deformation step S2. The 3D printer makes the production process very easy and simple because it can print out the real object without going through the process of making plaster model or mold.

According to the manufactured denture body (51a, 52a) to try the artificial teeth (51b, 52b) in accordance with the anatomy of the oral cavity of the subject to complete the denture outer appearance. Artificial teeth (51b, 52b) is poetic based on the interrelationship of the subject, at this time, the process of precisely matching the occlusal surface of the artificial teeth (51b, 52b) is also made.

The denture bodies 51a and 52a of the produced dentures 51 and 52 are formed with internal spaces 51c and 52c similarly to the modified 3D denture models 41 and 42. The inner spaces 51c and 52c are portions to which the inner mold materials 51d and 52d are subsequently applied to form denture inner molds.

After the denture outer fabrication step S3, the denture inner shaping step S4 is performed.

In the denture inner mold forming step (S4), the inner mold members 51d and 52d having fluidity are applied to the inner mold spaces 51c and 52c of the denture bodies 51a and 52a, and the teeth 11 of the subject are treated. 12) the inner material 51d, 52d is deformed so as to correspond to the shape of the subject's teeth 11, 12, and the inner material 51d, 52d is hardened to harden the teeth of the subject. 12) forming the denture inner mold corresponding to the shape.

First, as shown in FIG. 6, the inner mold material 51d, 52d having fluidity is applied to the inner mold spaces 51c, 52c of the denture bodies 51a, 52a.

In this step, a self-polymerizing material such as polymethylmetacrylate (PMMA) or polyethylmetacrylate (PEMA) may be used as the material for forming the denture inner part.

The internal material 51d and 52d may have fluidity, and may be cured by being placed in warm water containing a hardener to fix the shape. When the impressions of the subjects are precisely obtained on the inner mold materials 51d and 52d and then hardened, the strength is improved to resist the occlusal force and no abrasion or deformation occurs.

The internal material 51d and 52d is harmless to the human body and has fluidity so that it can be applied to the internal spaces 51c and 52c, and corresponds to the shape of the tooth 11 and 12 of the subject. May be deformed, and any material may be applied as long as it can be cured in a deformed state and the shape can be fixed. Of course, the curing method of the inner material 51d, 52d may also be made in various ways.

When the inner material 51d, 52d is applied to the inner spaces 51c, 52c of the denture body, the inner material (in the inner spaces 51c, 52c of the denture body 51a, 52a) It is preferable to apply an adhesive in advance to the internal spaces 51c and 52c of the denture bodies 51a and 52a so that 51d and 52d can be joined.

The inner mold materials 51d and 52d are preferably applied in an amount capable of completely filling the inner mold spaces 51c and 52c of the denture bodies 51a and 52a.

The denture bodies 51a and 52a are manufactured based on the generated deformed 3D denture models 41 and 42, and the spaces for internal parts 41a and 42a in the deformed 3D denture models 41 and 42 are 0.3 mm to 2 mm. Since the material for the inner portion 51d and 52d including the adhesive is removed in the same manner, the thickness is 0.3 mm to 2 mm.

If the inner mold materials 51d and 52d are excessively introduced to invade other sites or applied with excessive thickness, the inner mold materials 51d and 52d can be quickly removed before curing.

As described above, the denture bodies 51a and 52a coated with the inner mold materials 51d and 52d are brought into close contact with the teeth 11 and 12 of the subject as shown in FIG. It is modified to correspond to the shape of the teeth (11, 12).

Subsequently, when the internal parts 51d and 52d are cured, as shown in FIG. 8, the dentures 51 and 52 having the denture inner parts corresponding to the shape of the teeth 11 and 12 of the subject are obtained.

In the above description, it is described that the inside of the material 51d and 52d is hardened by putting it in warm water containing a curing agent after acquiring a precise impression of the subject, but it is not necessarily manufactured according to such a procedure.

According to the embodiment, even if a separate process for hardening does not go through, it is possible to use a material for the internal part which gradually hardens with time and changes from a fluid state into a hard state.

When using such an internal molding material, the impression is automatically obtained when mastication, and the state of elasticity is maintained for a certain period of time, so there is less discomfort before curing, and after curing, it precisely corresponds to the impression of the subject.

In the denture manufacturing method according to the present embodiment, as in the conventional method, the impression of the subject is precisely obtained and the denture outer and inner dentures of the dentures 51 and 52 are not manufactured at once, but the rough impression of the subject. To produce only the denture outer parts of the dentures 51 and 52, and the denture inner parts to be formed later using the inner material 51d and 52d.

In particular, when forming the denture inner portion using the inner material 51d, 52d, the inner member material 51d, 52d is directly deformed by the form of the tooth 11, 12 of the subject, thereby increasing the tooth 11 of the subject. 12) Denture inner parts that correspond precisely to the shape can be obtained.

This is more precise and less error than the conventional method of manufacturing the denture body at once by using a rigid plaster tooth model that does not accurately represent the anatomy of the oral cavity.

In addition, when manufacturing the denture outer parts of the dentures 51 and 52, the inner spaces 51c and 52c for accommodating the inner material 51d and 52d are formed in the denture bodies 51a and 52a in advance. It is possible to prevent the thickness of the dentures 51 and 52 from being thicker than the originally designed thickness when the inner material 51d and 52d is introduced.

On the other hand, in the present embodiment, in the denture model deformation step (S2), it has been described that in the 3D denture model (31, 32) to remove the portion corresponding to the impression surface of the subject with a thickness of 0.3mm ~ 2mm over the entire surface of the impression surface, However, some portions of the portions corresponding to the impression surface of the subject may be left as a plurality of stopper residual portions and may not be removed.

As described above, when the denture bodies 51a and 52a are manufactured in real form based on the modified 3D denture models 41 and 42 having the plurality of stopper residual portions formed therein, the spaces for the inner mold portion 41a and 42a are made of the inner mold material 51d. Of course, a space for applying 52d is formed, and a plurality of guide stoppers are formed in the inner spaces 41a and 42a.

That is, a plurality of guide stoppers formed integrally with the denture bodies 51a and 52a are formed, and the plurality of guide stoppers are located in the interior spaces 41a and 42a.

Then, in the denture inner mold forming step (S4), the plurality of guide stoppers are in close contact with the teeth of the subject to obtain a more precise denture inner mold.

That is, the plurality of guide stoppers of the denture bodies 51a and 52a do not have to be formed by the denture inner mold for a plurality of arbitrary portions where the impression is most precisely obtained when the impression corresponding to the tooth form of the subject is taken. By forming it as a part, the denture precision can be further improved.

The foregoing description of the present invention is intended for illustration, and it will be understood by those skilled in the art that the present invention may be easily modified in other specific forms without changing the technical spirit or essential features of the present invention. .

Therefore, the embodiments described above are to be understood in all respects as illustrative and not restrictive. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined form.

The scope of the present invention is shown by the following claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention. do.

The present invention can be used as a method of making dentures to replace missing teeth.

Claims (3)

An impression acquisition and 3D denture model generation step of acquiring an impression corresponding to the tooth form of the subject and scanning the same to generate a 3D denture model, which is a three-dimensional stereoscopic data set corresponding to the tooth form of the subject; A denture model deformation step of generating a deformed 3D denture model in which a space for an internal part is formed by removing a portion corresponding to an impression surface of a subject from the 3D denture model of the denture generated by the impression taking and 3D denture model generation step; A denture outer shape manufacturing step of manufacturing a denture body in which a space for an inner portion is formed based on the deformed 3D denture model generated in the denture model deformation step in real, and producing a denture outer shape by trying an artificial tooth on the denture body; After the denture outer part manufacturing step, by applying a fluid for the inner part of the denture body to the inner space of the denture body and closely adhered to the tooth of the subject to deform the inner material to correspond to the tooth form of the subject A denture inner mold forming step of curing the inner mold material to form a denture inner mold corresponding to the tooth form of the subject; Denture manufacturing method characterized in that it comprises a. The method of claim 1, In the denture inner mold forming step, a denture manufacturing method characterized in that the coating material for the inner mold after applying the adhesive to the inner space for the denture body. The method according to claim 1 or 2, In the 3D denture model, the portion corresponding to the impression surface of the subject is removed to a thickness of 0.3 mm to 2 mm over the entire surface of the impression surface to generate the deformed 3D denture model, wherein the internal material is used for the internal parts of the denture body. Denture manufacturing method characterized in that the coating is applied to a thickness of 0.3mm ~ 2mm over the entire space.

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