FR3066907B1 - MODULAR METAL REINFORCEMENT FOR THE PRODUCTION OF A DENTAL PROSTHESIS AND METHOD FOR THE IMPLEMENTATION THEREOF - Google Patents

Abstract

The invention relates to a modular metal frame for producing a dental prosthesis. It is essentially characterized in that it consists of at least one module (1) which connects two abutments, abutments or implants (21) and (22), opposite and which combines: -two elements (11) and ( 12) each comprising an annular portion (111, 121) adapted to position itself, encircling it, on each abutment, abutment or implant (21, 22) facing each other and a longitudinal portion (112, 122) consisting of at least one rod which is secured to the corresponding annular portion (111, 121); b) a third ring-shaped element (13) configured and dimensioned to house the rods (112) and (122) of said two elements (11) and (12), mounted in opposition, so as to keep them in contact with each other from one another and allow them to slide until the annular portions (111) and (121) of said elements (11) and (12) are interlocked respectively on the two abutments, abutments or implants (21) and (22) opposite. It is also characterized in that any extension of the metal frame is achieved by the addition of a new module (1) which connects one of the abutments, abutments or implants (21) and (22) previous to any new abutment, abutment or implant (23,24), the whole being stiffened by welding points (41, 42).

Description

MODULAR METAL REINFORCEMENT FOR THE PRODUCTION OF A DENTAL PROSTHESIS AND METHOD FOR THE IMPLEMENTATION THEREOF

DESCRIPTION

FIELD OF THE INVENTION

The present invention relates to the field of metal reinforcements for the production of dental prostheses.

It also relates to their method of implementation.

BACKGROUND BACKGROUND

The prior art proposes numerous devices and / or processes, the best known of which are: a) the one using the lost wax technique which generates several stages of implementation (coating, casting of the metal and scraping) which require a lot of time and using affordable everyday equipment; b) the one using CAD / CAM which also generates several stages of implementation (3D development of the infrastructure by means of a computer then realization of this one, in resin or metal, by means of sophisticated machine tools) which require also a lot of time and a significant investment in equipment.

SUMMARY OF THE INVENTION The aim of the invention is to propose a simple and modular solution that does not have the aforementioned drawbacks and that is capable of achieving, under advantageous conditions of speed and investment in equipment (such as for example a simple spot welding gun of the laser or pulsed arc type), metal frames for dental prostheses of all types (fixed or removable) and of any size (whatever the number of stumps, abutments or implants). The metal reinforcement according to the invention is essentially characterized in that it consists of at least one module which connects two abutments, abutments or implants, facing each other, belonging to the same maxillary or mandibular arch and which associates: a) a first element having an annular portion adapted to be positioned, encircling, on the first stump, abutment or implant and a longitudinal portion consisting of at least one rod which is secured to said annular portion; b) a second element comprising an annular portion adapted to be positioned, encircling, on the second abutment, abutment or implant and a longitudinal portion consisting of at least one rod which is secured to said annular portion; c) a third ring-shaped element, configured and sized to house the rods of said two elements, mounted in opposition, so as to keep them in contact with one another and to allow them to slide to the obtaining positioning of the annular portions of said elements respectively on the two abutments, abutments or implants facing each other.

According to the preferred embodiment of the invention: the constituent elements of the modules are identical and are obtained by bending-forming of a continuous metallic wire or rod which reproduces the annular part and the longitudinal part which is constituted, in this case two rods parallel to each other; - The third ring-shaped element is configured and dimensioned to accommodate the four rods, mounted in opposition and staggered, to keep them in contact with each other and to allow their sliding; the metal wire comprises opposite flat surfaces obtained, before the folding-forming operation, by crushing; - The flats of the four rods, taken in pairs, are facing in the retaining ring and sliding; - The retaining ring and sliding has an oblong shape obtained by crushing a cylindrical ring.

The module according to the invention is the same, in design and dimensions, whatever the type of reinforcement and the number of stubs, abutments or implants.

As for the method for the implementation of at least one module connecting two abutments, abutments or implants opposite, it consists, after positioning, by sliding rods, the annular portions respectively on said stubs, abutments or implants, to be joined between them, by welding points, said rods taken in pairs.

It also consists, to achieve an extension of the armature, to add a second module between one of the two abutments, abutments or previous implants and a third abutment, abutment or implant: a) to position the annular element of said second module on the annular element of the first module which encircles the head; b) positioning the annular element of said second module on the head of said third stump, abutment or implant; c) to join together, two by two, by welding points, the four rods of said second module; d) to join together, by welding points, the annular elements superimposed on the head of said second stump, abutment or implant.

It also consists, to achieve a new extension of the frame, to add a new module between the abutment abutment or previous implant which has only one annular element and a new stump, abutment or implant and to reproduce the steps (a ) to (d) above so as to obtain overall a metal reinforcement comprising a number of modules depending on the number of stumps, abutments or implants associated with the same prosthesis.

Finally, the metal reinforcement obtained, which consists of at least one module, is entirely coated with resin adapted to maintain prosthetic teeth. PRESENTATION OF FIGURES

The features and advantages of the invention will appear more clearly on reading the detailed description which follows of at least one preferred embodiment thereof given by way of non-limiting example and shown in the accompanying drawings.

In these drawings: FIG. 1 represents, in a flat view, a reinforcement module according to the invention; - Figure 2 shows, in section AA, the section of the ring for holding and sliding the 4 rods of a same module; FIG. 3 represents the section of the wire or rod constituting the elements of each module;

- Figure 4 shows, in top view, an armature consisting of 3 modules connecting 4 stubs, abutments or implants belonging to the same prosthesis. DETAILED DESCRIPTION OF THE INVENTION The metal frame shown in the figures is modular and is designed to meet any type and size of prosthesis regardless of the number of stumps, abutments or implants.

According to the main features of the invention, the armature consists of at least one module (1) which connects two abutments, abutments or implants (21) and (22), facing each other, belonging to the same maxillary or mandibular arch. (3) and which associates: a) a first member (11) having an annular portion (111) adapted to position, encircling, the first abutment, abutment or implant (21) and a longitudinal portion (112) consisting of at least one rod which is secured to said annular portion (111); b) a second member (12) having an annular portion (121) adapted to position, encircling, the head (22) of a second abutment, abutment or implant and a longitudinal portion (122); ) consisting of at least one rod which is secured to said annular portion (121); c) a third ring-shaped element (13), configured and dimensioned to house the rods (112) and (122) of said two elements (11) and (12), mounted in opposition, so as to keep them in contact with each other from one another and allow them to slide until the annular portions (111) and (121) of said elements (11) and (12) are interlocked respectively on the two abutments, abutments or implants (21) and (22) opposite.

According to the preferred embodiment of the invention, the elements (11) and (12) are identical and are obtained by folding-forming a wire, or ring, continuous metal which reproduces the annular portion (111, 121) and the longitudinal portion ( 112,122) which consists of two rods parallel to each other.

According to other features of the invention: the third element (13), in the form of a ring, is configured and sized to house the four rods (112, 122), mounted in opposition and staggered, to keep them in contact with each other; others and to allow their sliding; the metal wire comprises opposite flat surfaces obtained, before the folding-forming operation, by crushing; said flats being made to increase, for a given diameter, the rigidity of the rod, or rod; - The flats of the four rods (112,122), taken in pairs, are opposite in the retaining ring and sliding (13); - The holding ring and sliding (13) has an oblong shape obtained by crushing a cylindrical ring.

The method for the implementation of at least one module (1) connecting two abutments, abutments or implants (21) and (22), opposite, consists, after positioning, by sliding rods (112, 122), the parts annular (111) and (121) respectively on said stubs, pillars or implants (21) and (22), to join together, by welding points (41), the four rods (112,122) taken in pairs. The addition of a second module (1) between one (22) of the two abutments, abutments or previous implants and the head of a third abutment, abutment or implant (23) is performed by: a) positioning the annular element (111) of said second module (1) on the annular element (121) of the first module (1) which encircles the stump, abutment or implant (22); b) positioning the annular element (121) of said second module (1) on said third abutment, abutment or implant (23); c) by joining together, two by two, by welding points (41), the four rods (112,122) of said second module (1); d) by joining together, by welding points (42), the annular elements (121) and (111) superimposed on said second stump, abutment or implant (22). The addition of a new module (1) between the stump, abutment or implant (21) which comprises only one annular element (121) and a new stump, abutment or implant (24) belonging to a new stump, pillar or implant, is carried out by reproducing the steps (a) to (d) above so as to obtain overall a metal frame having a number of modules (1) depending on the number of stubs, pillars or implants associated with the same prosthesis. The metal reinforcement obtained, which consists of at least one module (1), is entirely coated with resin adapted to maintain prosthetic teeth. By way of non-limiting example, the device may: a) have for dimensions: - for the wire or rod, a diameter of between 0.5 and 2 mm and preferably between I and 1.5 mm; for the annular element, a diameter of between 4 and 6 mm and preferably between 4 and 6 mm; for the ring, a thickness of between 0.3 and 0.8 mm and preferably 0.5 mm and a length of between 2 and 6 mm and preferably 4 mm; b) be made of stainless steel.

According to other advantages of the invention: a) the modules (1): - adjustable in length, easily adapt to the varying distances existing between the heads of the stumps, abutments or implants; - Adjustable in rotation relative to each other, easily adapt to the angular variations between the heads of stubs, pillars or implants consecutive that are a function of the shape of the mandibular arch or maxillary; the modules (1) are industrially feasible in mass production for a minimum cost; the reinforcement, by its wire design, allows a better qualitative and quantitative coating of resin.

Of course, those skilled in the art will be able to carry out the invention as described and represented by applying and adapting known means without it being necessary to describe them or to represent them. It may also provide other variants without departing from the scope of the invention as determined by the content of the claims.

Claims (5)

KfcVtNUIUAI lUNb 1-metal frame for the production of a dental prosthesis, characterized in that it consists of at least one module (1) which connects two stubs, abutments or implants (21) and (22), opposite, belonging to the same maxillary or mandibular arch (3) and which associates: a) a first element (11) comprising an annular portion (111) designed to be positioned, encircling, on the first stump, abutment or implant (21) and a longitudinal portion (112) consisting of at least one rod which is secured to said annular portion (111); b) a second member (12) having an annular portion (121) adapted to position, encircling, the second abutment, abutment or implant (22) and a longitudinal portion (122) of at least a rod which is secured to said annular portion (121); c) a third ring-shaped element (13), configured and dimensioned to house the rods (112) and (122) of said two elements (11) and (12), mounted in opposition, so as to keep them in contact with each other from one another and allow them to slide until the annular portions (111) and (121) of said elements (11) and (12) are interlocked respectively on the two abutments, abutments or implants opposite (21) and 22). 2- metal reinforcement according to claim 1, characterized in that the elements (11) and (12) are identical and are obtained by bending-forming of a wire, or ring, continuous metal which reproduces the annular portion (111,121) and the longitudinal portion (112, 122) which consists of two rods parallel to each other. 3- metal frame, according to claim 2, characterized in that the third element (13), ring-shaped, is configured and dimensioned to accommodate the four rods (112, 122), mounted in opposition and staggered, to maintain them at contact each other and allow them to slide. 4- Metal frame, according to claims 2 and 3, characterized in that the wire has opposite flat surfaces obtained before the folding-forming operation, by crushing and in that the flats of the four rods (112, 122), taken two to two, are facing in the retaining ring and sliding (13). 5- metal frame, according to claims 3 and 4, characterized in that the retaining ring and sliding (13) has an oblong shape obtained by crushing a cylindrical ring.