EP4009901A2 - One-piece denture, method and kit for fitting a universal prosthesis comprising this denture - Google Patents

Abstract

The invention is aimed at a denture made from a single material and formed in a single piece which comprises a base-forming part, of a shape that complements the shape of a standardized edentulous jaw profile, and a dentition-forming part which comprises at least six artificial teeth of shapes corresponding to the incisors and the canines. The invention is also aimed at a complete removable dental prosthesis which comprises such a denture and a layer of bedding material, moulded directly between the edentulous jaw of a user and the part that forms the base of the denture. The invention is finally aimed at a fitting method and at a fitting kit for fitting such a dental prosthesis.

Description

A SINGLE HOLDER TOOTH, PROCESS AND KIT FOR PLACING A UNIVERSAL PROSTHESIS INCLUDING THIS DENTURE

TECHNICAL FIELD OF THE INVENTION

The present invention relates to a single piece denture, a method and a kit for fitting a universal prosthesis comprising this denture. The present invention belongs to the field of dental prostheses and more particularly to the field of removable dental prostheses without implant.

STATE OF THE ART

The absence of part of the teeth or all of the teeth in a person is disabling for medical reasons related to possible complications or pain, for practical reasons related to difficulties in chewing and certainly for aesthetic reasons.

These aesthetic considerations are particularly important in people who are completely edentulous. Not only can these people feel ashamed to smile for fear of showing missing teeth. But in addition, the absence of the teeth that usually support the lips, changes the profile of the face even when the mouth is closed. These factors can discourage those affected from appearing in public and lead to social isolation.

Dentures exist to replace missing teeth. They are custom-made prostheses, requiring the joint intervention of a dentist and a dental technician. These prostheses all share the characteristic of being expensive. Indeed, all current methods require the implementation of complex steps, such as placing an implant, taking careful primary and secondary impressions. These cost constraints make dental prostheses inaccessible to many people and mainly to the less fortunate people in whom we find disproportionately cases of partial or total absence of teeth, in the absence of prevention and regular and effective care. .

In particular, the prior art knows the American patent US Pat. No. 7,476,347 B1 which describes the manufacture of a denture comprising a step of taking information by taking an impression of a jaw and a step of assembling a corresponding denture. to the dimensions of the imprint. We are talking about assembly here, because the manufacture of the denture according to document US Pat. No. 7,476,347 B1 requires the use of several materials, respectively simulating the gum and the teeth, or a step of assembling individually manufactured teeth. The taking of information disclosed by US patent US 7,476,347 B1 consists of the lost wax method or of a digital capture described in US patent 6,174,168 B. OBJECT OF THE INVENTION

The present invention aims to remedy all or part of these drawbacks.

To this end, according to a first aspect, the present invention relates to a ready-to-wear denture made of a single material and formed in a single piece comprising:

- a base part, of complementary shape with the shape of a standardized edentulous jaw profile and

- a part forming a dentition which comprises at least six artificial teeth of shapes corresponding to the incisor and canine teeth of a human jaw.

The denture is in one piece which means that the denture is in one piece and forms a block of material without removable parts and preferably without independent parts permanently attached to each other by any manufacturing operation, such as welding or gluing. . For example, dentures are made by machining, casting or additive manufacturing.

Thanks to these arrangements, the denture which is the subject of the invention is a part manufactured quickly and in series, with a limited number of manufacturing steps, so that the denture represents a low production cost and a low cost for the user. final. Purely as an indication, the cost of a denture according to the invention could represent a price ten times lower than that of a custom-made denture. The denture that is the subject of the invention can be sold in stores, possibly on the Internet, since it is not necessary to try it on before purchasing it.

In addition, the shape of the denture corresponds to a shape compatible with a standard edentulous jaw profile. This means that there is no need to fabricate a custom denture, the costs associated with designing and manufacturing a custom denture are avoided.

This characteristic also has the effect of allowing the production of the denture in large series, thus drastically reducing its cost. Dentures therefore become accessible to as many people as possible. In particular, it becomes accessible to the poorest people, among whom there are disproportionately complete edentulous people.

According to the invention, the denture has a base portion, complementary in shape with the shape of a standardized profile of a healthy edentulous jaw. Thus, the denture is manufactured and supplied to the user without taking prior information concerning the dimensions of the jaw of said user. In other words, dentures are ready to wear. Ready-to-wear consists of pieces sold as a finished product and not made to measure. Advantageously, the denture model is an artificial model, created to appear aesthetic for a considered market.

The invention thus proposes a reversal of the known methods of manufacturing dentures which have as an essential first step an impression taking, physical or digital, followed by the manufacture of a personalized denture adapted to the morphologies of the user.

In embodiments, the denture is made by injection molding.

Injection molding is also referred to as plastic injection.

Thanks to these arrangements, the denture can be manufactured quickly and at very low cost in very large quantities. This manufacturing method is possible because the denture is not made to measure from an impression, but it is a standardized denture.

In some embodiments, the dentures are mass produced of at least one thousand dentures, preferably at least ten thousand dentures, very preferably at least one hundred thousand dentures.

In some embodiments, the denture has a length between 38 and 49 millimeters and a width between 37 and 53 millimeters.

The term “length” denotes the greatest distance on a sagittal section plane, that is to say on a central axis corresponding to an axis drawn from the center of the base part to the rear of the body. part forming the base of the denture up to the middle of the two artificial teeth corresponding to the incisors.

The term “width” denotes the greatest distance between two points of the denture on a frontal section plane.

In some embodiments, the denture has a length between 41 and 46 millimeters and a width between 40 and 50 millimeters.

The inventor has found that jaw sizes vary little in the adult population. The standard dimensions of the denture according to the invention allow most people to use it. In other words, the inventor offers universal dentures. The provision of a limited number of models of dentures is thus likely to suit any edentulous user in the same way as, in ready-to-wear clothing, the number of neck sizes of shirts for adults is limited to less about ten.

Thanks to these provisions, a potential user of the denture according to the invention is offered a single model or is offered a choice of sizes from a restricted range of sizes of a few "ready-to-wear" dentures. These provisions have the effect of reducing the cost of dentures.

In embodiments, the base portion is "U" shaped and configured to leave sufficient space so as not to interfere with the movement of the lip frenulum and the movements of the tongue of the denture wearer, when the denture is. positioned on his lower jaw. In embodiments, the dentition portion has less than ten artificial teeth of shapes corresponding to the incisors, canines, and premolars of a human jaw, with teeth of shapes corresponding to the molars being omitted.

Thanks to these arrangements, a space is left free at the back of the jaw. This space prevents any impact or friction between the molars of the upper jaw and the lower jaw. It is specified that these molars can equally well be natural or artificial molars. Thus, the mandible of the user of the denture object of the invention can rise completely to a natural resting position. Thanks to these arrangements, the movement of the temporomandibular joint is not hampered.

In some embodiments, at least two adjacent teeth are not separated by a space. In other words, a continuum of material forms the two successive teeth, thus filling the interdental space that would be present on a natural dentition.

Preferably, each of the teeth is connected to the tooth or to two adjacent teeth without a space provided between the teeth, so that the whole forms a block of material.

Thanks to these arrangements, the design of the denture is simplified, making it easier to manufacture. In addition, the strength of the denture is enhanced.

According to a second aspect, the invention relates to a complete removable dental prosthesis, which comprises:

- a ready-to-wear denture according to the invention,

- a hardenable base layer cured directly between a user's edentulous jawbone and the base portion of the denture.

In other words, the base layer is molded directly between the edentulous jaw of the user and the base portion of the denture.

Thanks to these arrangements, the dental prosthesis benefits, through the base layer, from a large area of intimate contact with the mucosa allowing good adhesion. The grip can be enhanced by the suction effect, also known as the "suction effect", particularly on the upper jaw.

At the same time, the base layer has a large contact surface with the base part of the denture, which also allows good adhesion.

In the context of the invention, the term “removable prosthesis” means a prosthesis which does not include any implant or any anchorage in the jaw.

The term “complete prosthesis” is understood to mean a prosthesis which can only be worn by a user who is completely edentulous on his upper or lower jaw. A complete prosthesis according to the invention makes it possible to replace at least six teeth. In embodiments, two dental prostheses according to the invention are used in combination, one prosthesis being positioned on the lower jaw and the other on the upper jaw.

Thanks to these provisions, the user can benefit from a prosthesis both to replace the teeth of his upper jaw and the teeth of his lower jaw.

In embodiments, the base portion has at least one cavity on its face configured to contact the base layer so as to increase the adhesion between the base portion and the cured, curable base layer.

In other words, the face configured to contact the base layer is the side of the base portion facing the user's jawbone during normal use of the denture. In other words, the face configured to contact the base layer is the face of the base portion furthest from the dentition portion.

Thus, part of the base material fits into at least one cavity during the molding of the molding layer and solidifies in place.

By virtue of these arrangements, the contact surface between the layer of base material and the base part of the denture is increased, which has the effect of strengthening the adhesion between the layer of base material and the base part of the denture.

In embodiments, at least one cavity has an opening narrower than at least part of the remainder of the cavity. In other words, the prosthesis has at least one cavity cut into the base portion of the denture which has an opening narrower than at least part of the rest of the cavity.

Thanks to these arrangements, part of the base material which fits into the cavity forms a solidified mass which is blocked in the cavity by the opening which is narrower than the cluster formed. An attachment point between the part of the denture forming the base and the layer of material is thus formed. This attachment point reinforces the hold of the base layer on the part forming the base.

In embodiments, the prosthesis further includes at least one adhesive sheet, adhesive on both sides, positioned between the layer of hardenable base material and the jawbone. The adhesive sheet can be replaced by a layer of Fixodent type denture adhesive (registered trademark).

In other words, the adhesive sheet is positioned on the base material layer on the side of the base material layer opposite to that facing the base portion of the denture.

Thanks to these provisions, the adhesion between the base layer and the jaw is reinforced.

According to a third aspect, the invention relates to a method of fitting a complete removable dental prosthesis, by an edentulous user on at least one of his own. jaws, which includes:

- a step of providing a ready-to-wear denture made of a single material and formed in one piece, comprising a part forming a base, of complementary shape with the shape of a standardized profile of edentulous jaw and manufactured without taking an impression of the edentulous user's jaw,

- a step of applying a layer of hardenable base material on the denture, the part of the denture forming the base,

- a step of inserting the denture into the oral cavity,

- a step of resting the part forming the base against the edentulous jaw and

- a step of hardening the base material.

Thanks to these provisions, the implementation of the method involves a limited number of simple and easy steps for the user. The ease of implementation of the process allows the user to perform the installation of the dental prosthesis themselves, which saves the cost associated with the intervention of a dental surgeon.

In some embodiments, the denture provided in the step of providing a denture is made by injection molding.

In some embodiments, the step of providing a denture includes providing a plurality of dentures for the same upper or lower jawbone, and the method of placing further includes the following steps:

- positioning of a measuring rod comprising two terminals spaced apart by a predetermined distance and

- selection of a denture from among the plurality of dentures provided to the user as a function of the relative position of the terminals with respect to predetermined anatomical landmarks of the user's mouth, when the height rod is positioned in the mouth of the user. user.

According to a fourth aspect, the invention relates to a kit for fitting a complete removable dental prosthesis which comprises the following elements:

- a denture made of a single material and formed in one piece comprising a part forming a base, of complementary shape with the shape of a standardized profile of edentulous jaw and a part forming a dentition which comprises at least six artificial teeth of shapes corresponding to the incisor and canine teeth of a human jaw and

- a hardenable base material.

In some embodiments, the fitting kit includes a plurality of dentures of different dimensions for the same jaw, lower or upper.

In some embodiments, the fitting kit comprises a height rod comprising two terminals spaced apart by a predetermined distance and in which the choice of the denture suitable for the user is made as a function of the relative position of the terminals with respect to predetermined anatomical landmarks of the user's mouth, when the height rod is positioned in the user's mouth.

The various aspects covered by the invention have the same aims, advantages and particular characteristics. They are therefore not recalled for each aspect covered by the invention.

BRIEF DESCRIPTION OF THE FIGURES

Other advantages, aims and particular characteristics of the invention will emerge from the non-limiting description which follows of at least one particular embodiment of the denture, of the dental prosthesis, of the installation method and of the installation kit which are the subject of present invention, with reference to the accompanying drawings, in which:

Figure 1 shows, schematically and in perspective view, a first particular embodiment of the denture object of the present invention,

Figure 2 shows, schematically and in bottom view, the first particular embodiment of the denture object of the present invention,

FIG. 3 represents, schematically and in top view, a second particular embodiment of the denture which is the subject of the present invention,

Figure 4 shows, schematically and in bottom view, the second particular embodiment of the denture object of the present invention,

FIG. 5 represents, schematically and in perspective view, a first particular embodiment of the dental prosthesis which is the subject of the present invention,

FIG. 6 represents, schematically and in sectional view, the first particular embodiment of the dental prosthesis which is the subject of the present invention,

FIG. 7 represents, schematically and in perspective view, a second particular embodiment of the dental prosthesis which is the subject of the present invention,

FIG. 8 represents, schematically and in perspective view, a third particular embodiment of the denture which is the subject of the present invention,

Figure 9 shows a photograph of a toothless person, seen from the side, with a lip visibly tucked in,

Figure 10 shows a photograph of the edentulous person of the previous figure, side view, wearing a dental prosthesis according to the invention,

Figure 11 shows a photograph, front view, of the edentulous person of the previous figure, wearing a dental prosthesis according to the invention,

FIG. 12 represents, schematically and in the form of a flowchart, a succession of particular steps of an embodiment of a method for fitting a dental prosthesis which is the subject of the present invention, FIG. 13 represents, schematically, a first particular embodiment of a height rod included in an installation kit according to the invention, and

Figure 14 shows, schematically, a second particular embodiment of a height rod included in a fitting kit according to the invention.

DESCRIPTION OF EMBODIMENTS

This description is given without limitation, each characteristic of an embodiment being able to be combined with any other characteristic of any other embodiment in an advantageous manner.

We note, from now on, that the figures are each to scale but, among them, the scales may vary.

In Figures 1 and 2, there are schematic views of a first embodiment of a denture 20 object of the present invention.

The denture 20 is made of a single material. In other words, denture 20 does not have distinct parts formed from distinct materials. In some embodiments, the denture 20 is made of plastic, for example polyethylene. In other embodiments, denture 20 is made of substituted acrylic acid polyester, vinyl polyester, polystyrene, methacrylic acid polyester modified rubber, polycarbonate, polysulfone, dimethacrylic acid polyester. or in polyacetal, in the aforementioned copolymer or mixture of polymers.

In some embodiments, denture 20 is made from a single material and has a material gradient. In some embodiments, denture 20 is made of a single material and a surface treatment is applied to denture 20.

The denture 20 is made by machining, molding or additive manufacturing, for example.

The denture 20 is formed in one piece. The denture 20 is in one piece and forms a block of material without a removable part or independent parts attached to each other by a mechanical fastener of the screw or staple type or by any manufacturing operation, such as welding or gluing.

In some embodiments, denture 20 is made by injection molding, also referred to as plastic injection. Preferably, a denture 20 is molded by means of a single mold, very preferably, a plurality of dentures is molded at the same time by means of a single mold comprising a plurality of denture impressions arranged side by side.

Two parts or areas are identified on the denture 20. A base portion 210 and a dentition portion 220 are identified.

The base portion 210 corresponds to the central portion of the denture 20. The dentition portion 220 is positioned around the perimeter of the base portion 210. The denture 20 is intended to replace the teeth of the upper jaw. It can only be used by people with edentulous upper jaw.

The base portion 210 has a complementary shape with the shape of a standardized edentulous jaw profile. The base portion 210 has a shape complementary to the shape of a palace, i.e. curved.

The base portion 210 is in the shape of a half oval with a domed center to conform to the shape of the palate. The base portion 210 covers more than half of the shape of the palate to promote adhesion between the palate and the dentures. Preferably, the part forming the base 210 covers more than two thirds of the shape of the palate.

The denture 20 has dimensions which correspond to dimensions identified by the inventor as permitting the use of the denture 20 in a large number of edentulous users. For example, denture 20 has a width of 41 millimeters and a length of 48 millimeters.

The dentition portion 220 has at least six artificial teeth whose shape and positioning are similar to the shape and positioning of natural teeth. It is recalled that the artificial teeth are in one piece with the denture 20 and are not parts attached to the denture 20. The six artificial teeth at least present on the denture correspond to the central incisor teeth, the lateral incisor teeth and the teeth. canines.

In embodiments illustrated in Figures 1 and 2, the dentition portion has twelve teeth. The artificial teeth corresponding to the teeth of the upper left jaw include a central incisor tooth 221, a lateral incisor tooth 222, a canine 223, a first premolar 224, a second premolar 225 and a first molar 226. The shape and positioning of each of these teeth correspond to the shape and positioning of equivalent teeth in a human jawbone. Artificial teeth corresponding to the teeth of the upper right jaw are also present on the denture 30, on the opposite edge.

In embodiments, the dentition portion has eight, ten, twelve, fourteen, or sixteen teeth similar in shape and positioning to the shape and positioning of natural teeth of human dentition.

It is specified that the teeth of the part forming the dentition 220 are not necessarily individualized. For example, molar 226 and second premolar 225 are formed in the same mass of material and are not separated from each other by a space.

In embodiments, the dentition portion 220 has less than ten artificial teeth of shapes corresponding to the incisors, canines and premolars of a human jaw, the teeth of shapes corresponding to the molars being omitted. In this In this case, empty spaces 240 and 241 where molars should be found in a full natural jaw are left empty. These spaces left free at the back of the jaw prevent any impact or friction between the molars of the upper jaw and the upper jaw.

In embodiments, the base portion 210 has a cavity 230 on one face configured to contact a base layer. The function of this cavity is to increase the adhesion between the base portion 210 and the layer of base material once solidified. This embodiment will be better understood on reading the description of FIG. 5.

In FIGS. 3 and 4, there are schematic views of a denture 30 which is the subject of the present invention. The denture 30 is made of a single material and formed in a single piece. A base portion 310 and a dentition portion 320 are identified. The denture 30 is intended to replace the teeth of the upper jaw.

Denture 30 differs from denture 20 in size and in the shape of teeth 321, 322, 323, 324, 325, and 326 of dentition portion 320.

The dimensions of denture 30 allow the use of denture 30 in a large number of edentulous users. The denture 30 has a length of 46 millimeters and a width of 48 millimeters.

The denture 30 comprises a cavity 330. The characteristics of the cavity 330 being similar to the characteristics of the cavity 230 of the first embodiment, they are not repeated here.

There are schematic views of a dental prosthesis 40 in Figures 5 and 6. Figure 5 shows the dental prosthesis 40 in perspective view. Figure 6 shows the dental prosthesis in a sagittal section plane, along section A-A shown in Figure 5. The sagittal section plane is centered from the back of the denture to the front of the denture.

The prosthesis 40 comprises a denture 400 and a layer of base material 450. The denture 400 comprises a part forming a dentition 420. The characteristics of the denture 400 may for example correspond to the characteristics of one of the dentures described in FIGS. 1 to 4. The base layer 450 is obtained by molding between the edentulous jaw of a user and the base portion 410 of the denture 400. The molding of the base layer between the base portion 410 and the user's jaw will be better understood. on reading the description of Figure 12.

The denture 400 comprises a part forming a dentition 420, the characteristics of which are for example similar to the parts forming a dentition described above. The central incisor tooth 421 is visible on the section plane A-A.

The denture 400 has a cavity 430. During the molding of the base layer between the base portion of the denture 400 and the user's jawbone, a portion of the base layer. base material enters and lodges in the opening of the cavity. As the hardenable base material hardens, the base material solidifies in place. Thus, the contact surface between the denture 400 and the base layer 450 is increased, which has the effect of increasing the adhesion between the denture 400 and the base layer 450.

In some embodiments, the cavity 430 hollowed out in the base portion 410 of the denture 400 has an opening narrower than at least a portion of the remainder of the cavity 430. For example, the cavity 430 is a groove. dovetail trapezoidal section, the short side of the trapezoid being positioned at the opening of the cavity.

There is shown in Figure 7, a schematic view of a dental prosthesis 50 according to the invention. The dental prosthesis 50 comprises a denture 500 covered by a base layer 550. The characteristics of the denture may for example correspond to the characteristics of one of the dentures described in FIGS. 1 to 4, the denture notably comprises a part forming a dentition 520. The denture prosthesis 50 further comprises an adhesive sheet 545. The adhesive sheet 545 is adhesive on both sides. One side of the adhesive sheet 545 is adhered to the base layer 550, the other side is pressed against the user's jaw. The adhesive sheet helps strengthen the adhesion of the dental prosthesis 50 to the jaw of the wearer.

In embodiments, at least one dimension of the adhesive sheet 545 corresponds to at least one dimension of the base portion 510 of the denture 500. For example, the adhesive sheet is in the shape of a half oval, of a semicircle or quarter moon whose contours correspond to the contours of the base part 510.

In some embodiments, the area of the adhesive sheet 545 is equal to or greater than half the area of the face of the base portion 510 on which it is positioned. Preferably, the surface of the adhesive sheet 545 is equal to or greater than two thirds of the surface of the face of the part forming the base 510 on which it is positioned. Preferably, the surface of the adhesive sheet 545 is equal to or greater than nine tenths of the surface of the face of the part forming the base 510 on which it is positioned.

There is shown in Figure 8, a schematic perspective view of a denture 60 according to the invention. The denture 60 is intended to replace the teeth of the lower jaw of a user. It can only be used by people with edentulous teeth on the lower jaw.

The denture 60 has a “U” shape, the dimensions of which are determined to allow accommodation, in the central space of the “U”, of the user's labial frenulum and his tongue. The user considered here is an adult human. Those skilled in the art know the dispersion of the dimensions of the jaw of an adult human and will be able to adapt the dimensions of the space delimited by the “U” shape without departing from the scope of the invention. By way of example, a surface space of between 8 and 12 square centimeters, measured in a median horizontal plane, is delimited by the "U" -shaped base portion.

For example, the "U" -shaped base part observed in section along a median horizontal plane has a thickness less than or equal to 2 centimeters, preferably less than or equal to 1 cm.

The denture 60 is made of a single material and formed in a single piece. A base portion 610 and a dentition portion 620 are identified.

As described above for a denture suitable for the upper jaw, a hardenable base layer can be molded and hardened directly on the edentulous lower jaw.

As described above for a denture adapted to the upper jaw, the denture 60 may include a cavity. During the molding of the base layer between the base portion of the denture 60 and the user's jawbone, a portion of the base material penetrates and becomes lodged in the opening of the cavity. As the hardenable base material hardens, the base material solidifies in place. Thus, the contact surface between the denture and the base layer is increased, which has the effect of increasing the adhesion between the denture and the base layer.

FIGS. 9, 10 and 11 show an example of use by a user of a dental prosthesis comprising a denture according to the invention. Said denture corresponds to the upper jaw. The photograph in Figure 9 illustrates the user without the dental prosthesis and Figure 10 illustrates the same user this time with a dental prosthesis according to the invention. It can be seen in Figure 10 that the user's upper lip 800 is enhanced due to the support provided by the dental prosthesis. The photograph in Figure 11 illustrates the aesthetic result obtained by the user when wearing a dental prosthesis according to the invention. The dentition portion 820 of the denture is visible in the photograph.

FIG. 12 shows an illustration, in the form of a flowchart, of the method 90 for fitting a dental prosthesis which is the subject of the present invention.

The object of the fitting process 90 is to form a base layer on the part forming the base of a denture described above.

It should be noted that the fitting method 90 can be implemented either on the lower jaw or on the upper jaw.

The base layer is formed from a base material which solidifies, for example from a plastic material. The base material is, for example, a self-polymerizing resin which is in semi-liquid or pasty form and then hardens, or a two-component silicone. In some embodiments, the curing of the base material requires mixing of the base with a curing agent which activates the curing of the base material. base material after a few minutes. The base material can for example harden when heated by body temperature in the oral cavity or harden at room temperature outside the oral cavity.

Those skilled in the art will be able to find the base material, according to the suppliers, under the name of “base material” under the name of “relining material”, or again under the name of “relining resin”, or even under the name of “relining resin”. the name of “relining polymer”.

The method 90 comprises a succession of simple steps which can be easily carried out by the user himself, without special medical training. The intervention of a health professional is not essential.

In some embodiments, in a first preparation step 905, the base material is prepared. This step consists, for example, in mixing two ingredients to form a resin. This step is not necessary if the resin is ready for use, for example when it is preconditioned in a syringe and deposited by means of a self-mixing device on the dentures.

In an application step 910, the base material is applied to the base portion of the denture. The base material is spread in a substantially uniform layer over the entire surface of one side of the denture intended to press against the user's jawbone.

In an insertion step 915, the denture is inserted into the oral cavity of the user.

During a step 920 of resting the part forming the base against the edentulous jaw, the denture is pressed against the jaw. The bearing pressure is for example provided by the tightening of the mandible against the upper jaw when the user tightens the teeth moderately in a centered occlusion position or in the maximum intercuspid position.

In some embodiments, the method 90 includes a step 923 of movement of the jaws by the user. The user of the dental prosthesis performs different facial expressions or expressions so that the different muscle insertions are expressed and imprinted in the material and then do not interfere with the holding of the prosthesis when these same expressions are performed unconsciously.

During a step 925 for hardening the base material, the base material changes from a pasty or semi-liquid state to a more solid state. It is specified that the base material, once hardened, can be elastic and compressible. The hardening step 925 can for example start from the step 905 of preparation of the base material, as soon as a mixture with a hardening product is made. The hardening step 925 can for example begin when the base material is exposed to the hot environment of the oral cavity. In some embodiments, the method 90 includes a step 930 of removing the excess base material. For example, excess cured curable base material is removed with a knife or blade. This operation removes the base material that is in excess and overflowing during the molding of the base material layer between the denture and the jawbone.

In embodiments, method 90 includes a step of positioning an adhesive sheet over the layer of cured curable base material. The adhesive sheet sticks to the user's palate or jawbone and ensures that the dentures hold better in the user's mouth.

In some embodiments, the adhesive product is protected by a removable protective film, so as not to be damaged during molding. In embodiments, an adhesive denture glue is used in place of the adhesive sheet.

The invention also relates to a fitting kit (not shown) of a removable dental prosthesis which comprises a denture as described above and a hardenable base material.

In some embodiments, the installation kit includes at least one adhesive sheet. Preferably, the adhesive sheet will be adapted to the dimensions of the denture.

In some embodiments, the fitting kit includes two dentures, including a lower jaw denture of the type described in Figure 8 and an upper jaw denture of the type described in Figures 1 to 7.

In embodiments, the fitting kit includes a plurality of dentures for the same jaw (upper or lower), each of the dentures having different dimensions. Preferably, the fitting kit comprises only two dentures here of different dimensions for the same jaw.

In some embodiments, the fitting kit includes a measuring rod allowing the user to select the denture of the size best suited to the dimensions of his jaw.

Within the meaning of the invention, a height rod is an instrument allowing the user of the fitting kit to determine, without the intervention of a health professional, which denture among several dentures present in the fitting kit is the most suitable for the dimensions. of the user's jaw. The height rod has a gripping end and at least two posts configured to be positioned on predetermined anatomical parts of the user's jaw or mouth.

There is shown in Figure 13 a first particular embodiment of a height rod 70 in the shape of a "U", comprising a body 72 provided with a gripping end 71 and two terminals, 74 and 75, separated from each other by a distance d1. The distance d1 is chosen according to with a dimension of at least one denture from the fitting kit. For example, the distance d1 is between four and six centimeters.

In order to choose the most suitable denture from among two choices of dentures of different sizes included in an installation kit, the user manipulates the rod 70 by the gripping end 71 and positions the rod 70 in his mouth. Terminals 74 and 75 are positioned horizontally within the user's jawbone so that the user's gum tissue is on either side of terminals 74 and 75. If the user feels that the dimensions of his jaw are sufficient to accommodate the terminals he will choose the small denture among the two dentures in the kit. On the contrary, if the terminals rest uncomfortably on the jaw or if they protrude on either side of the jaw then the user will choose the large denture from the two dentures in the kit.

This height rod 70 is particularly suitable for determining which denture among several dentures of the lower jaw is the most suitable.

FIG. 14 shows a measuring rod 80 comprising a body 82 in the form of a stick comprising a gripping end 80 and two terminals, 83 and 85, separated from each other by a distance d2. For example, the distance d2 is between four and six centimeters.

In order to choose the most suitable denture from among two choices of dentures of different sizes included in an installation kit, the user manipulates the rod 80 by the gripping end 81 and positions the rod 80 in his mouth. Terminal 85 is positioned behind the user's jaw, toward the throat, and Terminal 83 is positioned to abut against the user's lips, inside the mouth. If the user feels that the height rod is comfortable in their mouth, they will choose the large dentures from the two dentures included in the kit. On the contrary, if the terminal 85 causes discomfort, because it is positioned too far back in the throat, then the user will choose the dentures of small size.

The particular embodiments of the height rod, 70 and 80, described here make it possible to choose between two dentures. Those skilled in the art may add other height gauges of different dimensions, or height gauges comprising more than two terminals, to allow the user to choose between three or more dentures, without departing from the scope of the invention.

Claims

1. Ready-to-wear denture (20, 30, 60, 400, 500) made of a single material and formed in a single piece characterized in that it comprises: - a base part (210, 310, 610, 410, 510), of complementary shape with the shape of a standardized profile of edentulous jaw and - a part forming a dentition (220, 320, 620, 420, 520) which comprises at least six artificial teeth (221, 222, 223, 321, 322, 323) of shapes corresponding to the incisors and canines of a human jaw. 2. A denture according to claim 1, made by injection molding. 3. Dentures according to claim 2, mass-produced at least one thousand dentures, preferably at least ten thousand dentures, very preferably at least one hundred thousand dentures. 4. Denture according to one of claims 1 to 3, which has a length of between 38 and 49 millimeters and a width of between 37 and 53 millimeters. 5. Denture according to one of claims 1 to 4, wherein at least two adjacent teeth are not separated by a space. 6. Denture according to one of claims 1 to 5, wherein the base portion has a "U" shape configured to leave sufficient space so as not to impede the movement of the labial brake and those of the wearer's tongue. of the denture when the denture is positioned on its lower jaw. 7. Complete removable dental prosthesis, characterized in that it comprises: - a ready-to-wear denture according to one of claims 1 to 6, - A layer of base material (450, 550), hardenable directly between a user's edentulous jawbone and the base portion of the denture. 8. The prosthesis of claim 6, wherein the base portion has a cavity (230, 330, 430) on its convex face in contact with the layer of base material so as to increase the adhesion between the base portion and the hardenable base material layer cured. 9. The prosthesis of claim 8, wherein at least one cavity (430) has an opening narrower than at least part of the remainder of said cavity (430). 10. Prosthesis according to one of claims 7 to 9, which further comprises at least one adhesive sheet (545), adhesive on both sides, and positioned between the base material layer of hardenable material hardened and the jaw. 11. A method (90) for fitting a complete removable dental prosthesis according to one of claims 7 to 10, by a user who is edentulous on at least one of his own jaws, characterized in that it comprises: - the supply of a ready-to-wear denture made of a single material and formed in one piece, comprising a part forming a base, of complementary shape with the shape of a standardized profile of edentulous jaw and manufactured without grip impression of the jaw of the edentulous user, - the application (910) of a layer of hardenable base material on the denture the part of the denture forming the base, - insertion (915) of the denture in the oral cavity, - a bearing (920) of the part forming the base against the edentulous jaw and - hardening (925) of the base material. 12. The method (90) of laying according to claim 11, wherein the denture provided in the step of providing a denture is manufactured by injection molding. 13. A method (90) of placement according to one of claims 11 to 12, which comprises providing a plurality of dentures for the same jaw, upper or lower, and which comprises the following steps: - positioning of a measuring rod comprising two terminals spaced apart by a predetermined distance and selecting a denture from among the plurality of dentures provided as a function of the relative position of the terminals with respect to predetermined anatomical landmarks of the mouth of a user, when the height rod is positioned in the mouth of the user. 14. Kit for fitting a complete removable dental prosthesis characterized in that it comprises: - a denture (20, 30, 60, 400, 500) made of a single material and formed in a single piece comprising: a part forming a base, of complementary shape with the shape of a standardized profile of edentulous jaw and a dentition part which has at least six artificial teeth of shapes corresponding to the incisors, canines and the first teeth premolars of a human jaw and - a hardenable base material. 15. A fitting kit according to claim 14, which comprises a plurality of dentures of different dimensions for the same jaw, lower or upper. 16. Installation kit according to claim 15, which comprises a height rod (70, 80) comprising two terminals (74, 75, 84, 85) spaced apart by a predetermined distance (d1, d2) and in which the choice of denture adapted to the user is made according to the relative position of the terminals with respect to predetermined anatomical landmarks of the user's mouth, when the height rod is positioned in the user's mouth.