WO2015008215A1 - System for the design and implementation of a removable dental prosthesis - Google Patents

Abstract

System for the design of a removable total and partial prosthesis, comprising: • a plaque for mandibular impression for the mandible of a patient; • a plaque for maxillary impression (2), anatomically shaped such as to adapt to the patient's jaw, comprising a front portion (2a), two side portions (2b) and a central portion (2c) of concave shape; • a first impression device associated with said plate mandibular impression, comprising a plate on which is positioned a spacer member, adjustable in height; • a second impression device (20) associated with said plate maxillary impression (2), comprising a plate (21) of contrast, intended to come in contact with the spacer element, wherein said system comprises a device for simulation (30) of the maxillary teeth that includes a model of the teeth (31) which reproduces the maxillary anterior teeth, said simulation device (30) being movably associated with the second impression device (20).

Description

SYSTEM FOR THE DESIGN AND IMPLEMENTATION OF A

REMOVABLE DENTAL PROSTHESIS DESCRIPTION

The present invention relates to a device and to a system used in the technique of removable dental prostheses, in particular for the design and construction of a removable total prosthesis.

The techniques commonly used for the design and implementation of a removable dental prosthesis, either partial or total, are complex and require a great deal of time. Besides the fact that the patient is forced to submit to several sessions with the dentist, the process requires great skill on the part of the operator as well as dental technician, who is entrusted with the task of making the prosthesis.

Recently, more sophisticated techniques are emerging that provide a digital inprint, that is based on a digital image acquired directly from the patient's mouth. This technique obviously requires high accuracy.

The problem addressed by the present invention is to make available a device, and more generally a system usable in the various stages of implant dentures for a partial or total removable prosthesis as well as prosthetic technique that facilitate more precise design and the relative realization of a removable prosthesis. Objects of the invention therefore are devices and kits for the design of a removable prosthesis as outlined in the appended claims, the definitions of which form an integral part of the present description .

Another object of the invention is a method of design and construction of a removable partial denture, more preferably a total prosthesis, which uses the kit of the invention.

Further characteristics and advantages of the present invention will become better apparent from the description of some examples of realization configuration given below, deemed to be illustrative, but not exhaustive, with reference to the following figures :

Figure 1 is a front view of a impression plaque according to the invention;

Figure 2 is a front perspective view of a different impression plate according to the invention;

Figure 3 is a perspective view from the back of the impression plaque of figure 1 with an impression device ;

Figures 4 and 4A represent respectively a perspective view of the impression device of figure 3 and of a particular thereof;

Figure 5 is a perspective view from the back of the impression plaque of figure 2 with a device footprint; Figure 6 is a perspective views of the impression device of figure 5;

Figure 7 is a side view of the impression device of figure 5;

Figure 8 is a perspective view from the back of the impression plaque of figure 2 with an impression device mounted with a simulation device ;

Figures 9A, 9B, 9C and 9D represent possible adjustments of the simulation device of figure 8 ;

Figures 10A and 10B represent other possible adjustments of the simulation device of figure 8;

Figure 11 is a side view of different embodiments of the plaques of figures 1 and 2 installed in the oral cavity of a patient;

Figure 12 represents the view of figure 11, in which on a impression device is mounted a repositioning device according to the invention;

Figure 13 is a front view of the repositioning device of figure 12 mounted in the oral cavity of the patient ;

Figure 14 is a perspective view from the back of a plaque having an impression device on which is mounted the repositioning device of figure 12;

Figure 15 is a perspective view from the back of a different embodiment of a impression plaque having a impression device according to the invention; Figure 16 is a perspective view from the back of a different embodiment of a impression plaque having a impression device according to the invention.

With reference to the figures, the invention relates to a system and a kit for the design of a removable partial denture, preferably a total prosthesis.

Such a system and kit includes various devices whose structure and function are described below.

The invention comprises a first impression plaque for the mandible and a second impression plaque 2 for the jaw of a patient which must be designed for a removable denture prosthesis.

The first impression plaque 1, also said mandibular impression plaque 1, has anatomical shape such as to adapt to the mandible of a patient, placing bestride of the same, and thus comprises a front portion la and two side portions lb.

Vestibular (ie front) impression plaque 1 comprises at least three windows 3 designed to allow discovery of a portion of the gingival mucosa when the plate is worn on the patient's mandible.

On the occlusal side, impression plaque 1 comprises two guides 4 symmetrically placed in correspondence of the side portions lb. As shown in figure 3, the guides 4 serve as a seat for a first impression device 10 that will be described below.

The second impression plaque 2, also said impression jaw plate 2 (Figure 2) , has anatomical shape such as to adapt to the jaw and the palate of the patient, placing bestride of the jaw and adhering to the palate .

The impression plaque 2 thus includes a front portion 2a, side portions 2b and a central portion 2c with concave shape.

On the vestibular side the second impression plaque 2 comprises at least three windows 5 designed to keep open a portion of the gingival mucosa when the plaque is worn on the patient's jaw.

On the occlusal side, the second impression plaque 2 comprises two guides 6 symmetrically placed in correspondence of the side portions 2b. As shown in figure 5, the guides 6 act as a seat for a second impression device 20 that will be described below.

The first and the second impression plaque 1, 2 are made of a resin and can be prepared in various standard sizes, so as to adapt to the different types and sizes of the oral cavity of a patient.

In preferred embodiments, the plaques impression 1, 2 are made of one piece.

As shown in figures 3, 4 and 4A, the first impression device 10 is associable in a removable way to the impression plaque mandibular 1 and in particular comprises a plate 11 of elongated shape and a length such as to fit and engage at snap with the guides 4. Guides 4 are structured in such a way as to allow the introduction of the plate 11 from both vestibular and palatal side.

The plate 11 has a central portion in relief 12 in which a threaded through hole is made perpendicular to the plane of the plate 11. In the threaded hole is inserted a spacer member 13 which includes an upper portion 14, emerging from the hole and having ogival shape, and a threaded portion 15, intended to engage with the threading of said hole.

Depending if unscrewed or screwed into the threaded hole, the spacer member 13 can vary its distance from the plane of the plate 11, assuming different positions of distancing.

As shown in figures 5-7, the second impression device 20 can be associated in a removable manner to the plaque maxillary impression 2 and in particular comprises a plate 21 of contrast, intended to come in contact with the spacer element 13 when the two plaques 1, 2 are positioned in the oral cavity of the patient. The plate 21 is insertable to snap into respective guides 6. For this purpose, the plate 21 along the side edges 21a comprises two teeth 22 which are intended to engage with respective grooves (not visible) inside of the guides 6.

Guides 6 are structured in such a way as to allow the introduction of the plate 21 from both vestibular and palatal sides. The plate 21 comprises, in the vicinity of the rear side 21b, an eyelet 23 that acts as a gripping means for the hand of an operator for the insertion or extraction of the impression device 20 from the plate maxillary impression 2.

The front face 21c of the plate 21 has a semicircular profile, so as to fit the gingival arch, and includes a support element 24 that protrudes from it both in front and superiorly.

The support element 24 comprises a horizontal through hole 25, which faces the front faces 24a and rear 24b of the support element, and a vertical threaded hole 26 which connects the upper face 24c of the support element 24 with the horizontal through hole 25.

The plates 11, 21 can be made of metallic material or a radio transparent resin, in case it is necessary to perform an X-ray impression of the oral cavity when the plates 11, 21 are inserted.

The system and kit of the invention also includes a simulation device 30 shown in figure 8 already mounted, through the impression device 20 on the plate for maxillary impression 2.

The simulation device 30 comprises a model of teeth 31 that reproduces the maxillary anterior teeth, on whose rear side (palatal side) is fixed a guide 32. In a preferred embodiment, the guide 32 is formed by a foil folded at the top and inferiorly so as to leave an open horizontal crack.

The simulation device 30 further includes a slide 33 to slide horizontally within the guide 32, so that the teeth model 31 is movable in the directions of arrows A-A'. In a preferred embodiment of the slide 33 has a trapezoidal profile in section.

To the slide 33 is fixed a pin 34. The pin 34 is insertable into the through hole 25 of the support element 24, so that it can be adjusted forward or backward as shown by the arrows B-B 'and also to rotate about to its axis as indicated by arrow C.

The set of movements described above allow to identify the correct position of the model of the teeth 31 in the patient's mouth. An example of different possibilities of adjustment is shown in figures 9A, 9B, 9C, 9D (front aesthetic simulation) and 10A, 10B (side aesthetic simulation).

Once identified the correct position, the pin 34 is fixed in the through hole 25 via a fastening screws (not shown) inserted into the threaded hole 26, which acts as a clamp.

The teeth model 31 is normally made of resin and is provided in different sizes, so as to adapt both functionally and aesthetically to the oral cavity and the face of the patient. The system and kit of the invention further comprises a repositioning device 40 (Figures 12, 13 and 14), the function of which will be clarified in the following. The repositioning device 40 comprises a pin 41, to one end of which are fixed perpendicularly three arms 42 whose distal ends are placed at the vertices of a triangle. In these distal ends are fixed as many spheres 43 radio-opaque material.

The pin 41 is insertable into the through hole 25 of the support element 24 positioned on the impression device 20 of plaque from maxillary 2. On the pin 41 is fixed a pair of side flaps 44 (a single flap 44 is visible in figure 14) which act as stop elements and embracing the support element 24, serve to keep the repositioning device 40 in its proper position, preventing the rotation.

In the case in which the mouth of the patient was not fully edentulous, the system and kit of the invention comprises impression plaques 101, 102 (Figures 15 and 16) adapted to the gingival arches of the patient, on which there are still some teeth. Obviously, the impression plaques 101, 102 shown in the figures are only examples, having to be made from time to time with CAD/CAM systems depending of the remaining teeth in the oral cavity.

Plaque for maxillary impression 102 (figure 15) comprises, similarly to the previously described plaque 2, a front portion 102a, side portions 102b and a central portion 102c.

On both side portions 102b are positioned the guides 106 for the introduction of the impression device 20. Along its outer edge, the plaque 102 will also have one or more recesses 103 to accommodate the remaining teeth .

Even the plaque for mandible impression 101 comprises a front portion 102a and side portions 102b and recesses 103 for the remaining teeth of the patient. In one embodiment (shown in figure 16), however, the plaque for mandible impression 101 also includes a bridge portion 150 on which is disposed the central portion in relief 112 comprising the threaded hole for the housing of the organ spacer 13. Building the plaque 101 and the impression device 150 of only one piece allows to model and place the latter in order to avoid interference with the teeth already present in the oral cavity.

Indeed, in certain cases, the use of the previous embodiment, in which the plate 21 has shape, size and position fixed, even if modified with the recesses 103, may not fit with size present in the oral cavity. In other cases, however, the realization configuration in two pieces shown in figure 1, suitably adapted with the recesses 103, may be usable. It will be described now a method for the design and the realization of a removable partial or total denture using the system and the kit of the invention. A first step of the method according to the invention, ie the phase of adjustment of chewing, provides:

al) mounting the first and the second impression device 10, 20 on the respective impression plaques mandibular and maxillary 1 2;

bl) inserting the said plaques of the appropriate size to the patient 1, 2 on the mandible and the jaw of the patient, respectively, by adjusting the height of the organ spacer 13 so that it abuts against the maxillary plaque 21 when the mouth of the patient is closed and jaw and mandible are properly spaced;

cl) making the patient carry a series of horizontal movements both lateral and protrusive of the mandible relative to the jaw, so that the tip of the organ spacer 13 draws a series of lines on the surface of the plate 21 which will intersect at a central point; dl) fixing to the maxillary plate 21 a washer 27 (Figure 5) which locates at its center the point of convergence of the reference lines 28 of mastication. The second stage of the method, ie the design phase, provides :

a2) choosing the size of the teeth of the teeth model 31 best suited to the patient;

b2) mounting the simulation device model 30 with the chosen teeth model 31 on the impression device 20 inserted into the maxillary impression plaque 2 ( Figure 8 ) ;

c2) adjusting the projection, the horizontal plane and the vertical median line of the incisal line of the upper teeth, as previously described in relation to figures 9A-9D and 10A-10B;

d2) applying on the gingival mucosa of the patient, through the at least three windows 3, 5 of the impression plaques 1, 2, three upper reference points 60 and three lower reference points 60 (Figures 10A- 10B) ;

e2) performing a digital scan of the oral cavity of the patient so as to acquire a digital image of the six points and the position and size of the simulation device 30;

f2) processing the acquired digital image on the basis of the six points of reference 60 in order to build a model of occlusal relationship between the lower and the upper dental arch;

g2) removing impression plaque 1, 2 from the oral cavity of the patient;

h2) detecting a digital impression of maxillary and mandibular gingival arch;

i2) processing the digital image acquired at the point f2) and the digital impression acquired to the point h2) on the basis of the superposition of the six reference points 60 in the two images, so as to build a model of the dental arch of the upper and lower dental arch with the proper bite relationship;

12) building a removable partial or complete denture based on the model of the phase i2) .

In certain embodiments, the reference points 60 are constituted by small semi-spheres, for example plastic material, which are adherent to the mucosa by means of adhesives skin, for example adhesives based on medical grade cyanoacrylate or polymethacrylate .

The digital scan can be performed by means of a scanner or a camera of the type used in dental applications .

The realization of the prosthesis according to the stage 12) can be made according to automated methods of milling (subtraction of material) or 3D printing (adding material) .

The method described above is also applicable in the case of impression plaques 101, 102 modified as shown in figure 15 and 16.

According to a variant of the realization method, applicable in the case where it is not possible to detect the digital impression of the stage h2) in the oral cavity of the patient, we proceed with the following steps:

a3) repeating steps al)-dl) and a2)-g2);

b3) providing a maxillary impression plaque 201 and mandibular impression plaque 202 (Figure 11) as described above, but without windows 3, 5; c3) inserting on impression plaques 201, 202 the respective impression devices 10, 20 adjusted according to step bl);

d3) coating the side facing the gingival arch of the impression plaque 201, 202 with impression dough;

e3) applying the impression plaques 201, 202 obtained in step d3) to the gingival arches of the patient in order to detect the impression including the reference points 60;

f3) removing impression plaques 201, 202 and performing a digital scan of the side coated with the dough impression so as to obtain a digital image; g3) processing the digital image acquired at the point f2) and the digital image acquired at the point f3) on the basis of the superposition of the six reference points 60 in the two images, in order to build a model of the upper dental arch and of the lower dental arch; h3) building a removable partial or complete denture based on the model of the phase g3) .

The impression dough is of the type conventionally used in dental applications.

According to a further realization variant, the method of the invention comprises the steps of:

A) performing steps al)-dl) and a2)-h2);

B) mounting the repositioning device 40 on the impression device 20 inserted into the plaque impression 2 and inserting the impression plaque 2 into the gingival arch of the patient;

C) acquiring a digital image of an x-ray or a photograph of the maxillary-mandibular portion of the patient's face and overlap this said digital image with the digital impression of the passage h2) ;

D) designing a draft of the removable partial or total denture on the basis of the overlap obtained in step C) and the model of phase i2) .

A further object of the invention is a kit for the design of a removable partial or total denture comprising :

- One or more maxillary impression plaques 1 with windows 3;

- One or more mandibular impression plaques 2 with windows 5;

- At least one impression device 10 for that said maxillary impression plaque 1;

- At least one impression device 20 for that said mandibular impression plaque 2;

- At least one simulation device 30;

- Optionally, at least a repositioning device 40;

- Optionally, one or more impression plaques 201, 202 without windows 3, 5;

- Optionally, an amount of impression dough;

- Optionally, a plurality of reference points 60 in the form of semi-spheres;

- Optionally, an amount of dentistry adhesive. The advantages of the invention are manifold. The system described above, while being adaptable to the traditional techniques of impression taking, allows to implement a method of digital impression in a simple and efficient way, which can lead to the all digital design of a removable total prosthesis.

The fact that the impression devices 10, 20 can be associated in a removable manner to the respective impression plaques 1, 2 is a further important advantage. Indeed, we must prepare plaques 1, 2 in various sizes, to adapt to the various patients, and in some cases they should be tailored case by case. Conversely, being the impression devices 10, 20 removable, they can be reused with a considerable saving of costs.

The simulation device 30 is another important advantage, since it allows one to make easier and more accurate digital design of the prosthesis.

It's obvious that we have been described only some particular forms of realization configuration of the present invention, where the expert of the art will be able to make all those modifications necessary for its adaptation to particular applications, without thereby departing from the scope of protection of present invention .

Claims

1. System for the design of a removable partial or total prosthesis, comprising:

- A plaque for mandibular impression (1, 101) having a shape such as to adapt anatomically to the mandible of a patient, comprising a front portion (la, 101a) and two side portions (lb, 101b);

- A plaque for maxillary impression (2, 102) having anatomically shape such as to adapt to the patient's jaw, comprising a front portion (2a, 102a), two lateral portions (2b, 102b) and a central portion (2c, 102c) of concave shape;

- A first impression device (10) associated with said mandibular impression plaque (1, 101), comprising a plate (11) on which is positioned a spacer member (13) adjustable in height along the direction perpendicular to said plate (11 );

- A second impression device (20) associated with said maxillary impression plaque (2, 102), comprising a plate (21) of contrast, intended to come into abutment with the spacer element (13), characterized in that said system includes a simulation device (30) of the maxillary teeth that includes a model of the teeth (31) which reproduces the anterior maxillary teeth, said simulation device (30) being movably associated with the second impression device (20) .

2. System according to claim 1, wherein said first impression device (10) can be associated in a removable manner to said mandibular impression plaque (1, 101).

3. System according to claim 1 or 2, wherein on the front portion (la, 101a) of said mandibular impression plaque (1, 101) are positioned at least three windows

(3) able to leave uncovered a portion of the gingival mucosa when the plate (1, 101) is worn on the patient's mandible, and wherein on the front portion

(2a, 102a) of said maxillary impression plate from (2, 102) are positioned at least three windows (5) able to leave uncovered a portion of gingival mucosa when the plate (2, 102) is worn on the patient's jaw.

4. System according to any one of claims 1 to 3, wherein said mandibular impression plaque (1, 101) comprises two guides (4) symmetrically placed in correspondence of the side portions (lb, 101b), said guides (4) acting as a seat for snap engagement of said first impression device (10); and wherein said maxillary impression plaque (2, 102) comprises two guides (6, 106) symmetrically placed in correspondence of the side portions (2b, 102b), said guides (6, 106) acting as a seat for the snap engagement of the second impression device (20), and wherein said guides (4, 6, 106) are dimensioned in such a way as to allow the introduction of the respective impression devices (10, 20) both from vestibular and palatal side.

5. System according to any one of claims 1 to 4, wherein said plate (11) of the first impression device (10) has a central portion in relief (12) in which has been made, perpendicular to the plane of the plate

(11) , a threaded blind hole, in that said threaded hole being inserted the spacer member (13), said spacer member (13) comprising an upper portion (14), emerging from the hole, and a threaded portion (15), intended to engage with the thread of said threaded hole .

6. System according to claim 4 or 5, wherein the plate

(21) of the second impression device (20) comprises lateral edges (21a) on which are arranged two teeth

(22) which are intended to engage with respective grooves present at interior of the guides (6) of the maxillary impression plaque (2, 102).

7. System according to any one of claims 1 to 6, wherein the plate (21) has a front side (21c) with a semicircular profile, so as to fit the gingival arch, on said front side (21c) being disposed a support element (24) which protrudes both anteriorly and superiorly and it comprises a horizontal through hole (25), which faces the front faces (24a) and rear (24b) of the support element (24) .

8. System according to claim 7, wherein the support element (24) comprises a vertical threaded hole (26) which connects the upper face (24c) of the support element (24) with the horizontal through hole (25), in said threaded hole (26) being insertable a fixing screw .

9. System according to claim 8, wherein the rear side of said model of teeth (31) is fixed to a guide (32), the simulation device (30) also comprising a slide (33) able to slide horizontally within the guide (32) and a pin (34) insertable into the through hole (25) of the support element (24), in such a way that it can be adjusted forward or backward, so that the teeth model (31) is movable laterally and/or protrusively and/or around the axis of the pin (34).

10. System according to any one of claims 1 to 9, comprising a repositioning device (40) that cam be associated in a removable manner to the second impression device (20), wherein the repositioning device (40) comprises a pin (41), at one end of which are fixed perpendicularly three arms (42) whose distal ends are placed at the vertices of a triangle, to such distal ends being fixed three small balls (43) in the radio-opaque material.

11. System according to claim 10, wherein the pin (41) is insertable into the through hole (25) of the support element (24), on the pin (41) being fixed to a pair of side flaps (44) that serve as stop elements of the repositioning device (40) , preventing its rotation .

12. System according to any one of claims 1 to 11, wherein said mandibular impression plaque (101) and jaw (102) comprise, along their outer edge one or more recesses (103) sized to accommodate one or more teeth of the patient.

13. System for the design of a removable partial or complete dentures, including:

- A mandibular impression plaque (1, 101) having a shape such as to adapt anatomically to the mandible of a patient, comprising a front portion (la, 101a) and two side portions (lb, 101b);

- A maxillary impression plaque (2, 102) having a shape such as to adapt anatomically to the patient's jaw, comprising a front portion (2a, 102a), two lateral portions (2b, 102b) and a central portion (2c, 102c) of concave shape;

- A first impression device (10) associated with said impression plaque mandibular (1, 101), comprising a plate (11) on which is positioned a spacer member (13) adjustable in height along the direction perpendicular to said plate (11 ) ;

- A second impression device (20) removably attachable to said maxillary impression plaque (2, 102), comprising a plate (21) of contrast, intended to come into abutment with the spacer element (13).

14. Method for design and construction of a removable partial or total prosthesis, said method comprising:

- A step of providing a system as outlined in one of any of claims 1 to 13;

- An adjustment step of mastication, which entails: al) mounting the first and the second impression device (10, 20) on the respective mandibular impression plaques (1, 101) and maxillary (2, 102); bl) inserting the said plaques (1, 102, 2, 102) on the mandible and the jaw of the patient, respectively, by adjusting the height of the- spacer member (13) in such a way that it abuts against the maxillary plate (21) when the patient's mouth is closed and the jaw (MS) and the mandible (MN) are properly spaced;

cl) making the patient carry a series of horizontal movements both lateral and protrusive of the mandible relative to the jaw, so that the tip of the spacer member (13) signs a series of lines on the surface of the plate (21) that will cross in a central point;

dl) fixing to the maxillary plaque (21) a washer (27) at its center which locates the reference point (28) of mastication;

- A phase of design and construction, which entails: a2) choosing the size of the teeth of the model of toothing (31) best suited to the patient;

b2) mounting the simulation device (30) with the model of teeth (31) selected on the second impression device (20) inserted into the maxillary impression plate (2, 102) ;

c2) adjusting the projection, the horizontal plane and the vertical median line of the incisal line of the teeth model ( 31 ) ; d2) applying on the gingival mucosa of the patient, through the at least three windows (3, 5) of the impression plaques (1, 101, 2, 102) three upper reference points (60) and three lower reference points (60) ;

e2 ) performing a digital scan of the oral cavity of the patient so as to acquire a digital image;

f2) processing the digital image acquired on the basis of six reference points (60) in order to build a model of occlusal bite arch relationship between the lower and the upper dental arch;

g2) removing the impression plaque (1, 101, 2, 102) from the oral cavity of the patient;

h2) detecting a digital maxillary and mandibular impression of the gingival arch;

i2) processing the digital image acquired at the point f2) and the digital impression acquired to the point h2) on the basis of the superposition of the six reference points (60) in the two images, in order to build a model of the upper dental arch and of the lower dental arch in the right occlusal relationship; 12) designing with CAD and realizing with CAM a partial or complete removable denture based on the model of the phase i2) .

15. Method for the design and construction of a partial or total removable prosthesis, said method comprising : - A step of providing a system as outlined in any one of claims 1 to 13;

- A step which entails:

a3) repeating steps al)-dl) and a2)-g2) according to claim 14;

b3) providing a maxillary impression plaque (201) and a mandibular impression plaque (202) with no windows ( 3 , 5 ) ;

c3) inserting on impression plaques (201, 202) of step b3) the respective impression devices (10, 20) adjusted according to step bl);

d3) coating the side facing the gingival arch of the impression plaque (201, 202) with impression dough; e3) applying the impression plaques (201, 202) obtained in step d3) to the gingival arches of the patient in order to detect the impression including the reference points (60);

f3) removing the impression plaques (201, 202) and performing a digital scan of the side coated with the impression dough so as to obtain a digital image;

g3) processing the digital image acquired at the point f2) and the digital image acquired at the point f3) on the basis of the superposition of the six reference points 60 in the two images, in order to build a model of the dental arch of the upper and lower dental arch; h3) building a partial or complete removable denture based on the model of the phase g3) .

16. Method for the design and construction of a partial or total removable prosthesis, said method comprising :

- A step of providing a system as outlined in any one of claims 1 to 13;

- A step which entails:

A) performing the steps al)-dl) and a2)-h2) according to claim 14;

B) mounting the repositioning device (40) on the second impression device (20) inserted into the impression plaque (2, 102) and inserting the impression plaque (2, 102) to the gingival arch of the patient ;

C) acquiring a digital image of an x-ray or a photograph of the maxillary-mandibular portion of the patient's face and overlap the said digital image with the digital impression of the passage h2);

D) processing a project of the partial or complete removable denture on the basis of the overlap obtained in step C) and the model of phase i2) .

17. Method according to any one of claims 14 to 16, wherein said reference points (60) are constituted by small semi-spheres, for example in plastic material, which are glued to the gingival mucosa by means of adhesives skin.

18. Kits for the design of a partial or complete removable denture, consisting of: - One or more maxillary impression plaques 1 with windows 3;

- One or more mandibular impression plaques 2 with windows 5;

- At least one impression device 10 for said maxillary impression plaque 1;

- At least one impression device 20 for said mandible impression plaque 2;

- At least one simulation device 30;

- Optionally, at least a repositioning device 40;

- Optionally, one or more impression plaques 201, 202 without windows 3, 5;

- Optionally, an amount of impression dough;

- Optionally, a plurality of reference points 60 in the form of semi-spheres;

- Optionally, an amount of adhesive dentistry.