INTRA-BONE SECTION OF AN IMPLANT FOR DENTAL PROSTHESES

Abstract

An intra-bone section of an implant for dental prostheses, to be fixed within the bony part of the gingiva and adapted to receive, upon assembly, a tooth-anchoring superstructure.

Claims

1. An intra-bone section of an implant for dental prostheses, to be fixed within the bony part of the gingiva and adapted to receive, upon assembly, a tooth-anchoring superstructure which is constituted by: a stump which has an axial through hole and is to be accommodated partly in a seat provided in said intra-bone section, a stump fixing pin, to be inserted axially into said stump and provided with a threaded portion which is associated upon assembly with a complementarily-threaded dead hole which is provided axially on the bottom of said seat, wherein said seat has, in cross-section, in the region for accommodating said stump and in sequence from the top, a conical portion, a triangular portion and a hexagonal portion.

2. The intra-bone section according to claim 1, wherein such triangular portion has rounded vertices.

3. The intra-bone section according to claim 1, wherein an external surface thereof is contoured so as to define a threading which is adapted to provide a self-tapping implant in the gingiva.

4. The intra-bone section according to claim 1, having at an end that is adapted to be directed toward the outside of the gingiva, a transgingival collar at which said seat is axially defined.

5. The intra-bone section according to claim 4, wherein a wall of an end portion of said transgingival collar has a conical shape that defines said conical portion, for guiding and self-centering the insertion of a said stump, upon assembly.

Description

[0020] Further characteristics and advantages of the invention will become better apparent from the detailed description that follows of a preferred, but not exclusive, embodiment of the intra-bone section according to the invention, which is illustrated for the purposes of non-limiting example in the accompanying drawings wherein:

[0021] FIG. 1 shows an implant for fixing dental prostheses, with an intra-bone section according to the invention;

[0022] FIG. 2 is a cross-sectional side view of an intra-bone section according to the invention;

[0023] FIG. 3 is a view from above of the intra-bone section.

[0024] With reference to the figures, the intra-bone section according to the invention, generally designated by the reference numeral 10, can be utilized in the provision of an implant for dental prostheses.

[0025] The intra-bone section 10 is in fact to be fixed within the bony part of the gingiva and is adapted to receive, upon assembly, a tooth-anchoring superstructure, generally designated with the reference numeral 11.

[0026] The superstructure 11 serves to anchor the dental prosthesis, not shown, and is constituted by:

[0027] a stump 12 which has an axial through hole 13 and is to be accommodated partly in a seat 14 provided in the intra-bone section 10,

[0028] a stump fixing pin 15, to be inserted axially into the stump 12 and provided with a threaded portion which is associated upon assembly with a complementarily-threaded dead hole 16 which is provided axially on the bottom of the seat 14.

[0029] FIG. 1 shows an implant with an intra-bone section 10 and the superstructure 11. Therefore the stump 12 and the stump fixing pin 15 are also indicated. The whole is partially cross-sectional to show the coupling of the superstructure 11 with the intra-bone section 10 according to the invention.

[0030] As shown in FIG. 2, the seat 14 has, in cross-section, in the region for accommodating the stump 12 and in sequence from the top, a conical portion 17, a triangular portion 18 and a hexagonal portion 19.

[0031] The dead hole 16 is provided below the hexagonal portion 19, in order to receive, upon assembly, the threaded portion of a stump fixing pin 15.

[0032] The triangular portion 18 has rounded vertices, as can clearly be seen in the view from above in FIG. 3.

[0033] Also in that figure it can be seen that the vertices of the triangular portion 18 are provided on alternating sides of the hexagon shape of the hexagonal portion 19.

[0034] In FIG. 1 it is clear that the coupling between the intra-bone section 10 and a stump 12 occurs at a shank 20 of that stump 12, which must be at least partially shaped complementarily to the seat 14 of the intra-bone section 10 so that mutual rotation will not occur.

[0035] The external surface of the intra-bone section is contoured so as to define a threading 21 which is adapted to provide a self-tapping implant in the gingiva.

[0036] The intra-bone section 10 has, at the end that is directed toward the outside of the gingiva, a transgingival collar 22 at which the seat 14 is axially defined.

[0037] The wall of an end portion of the transgingival collar 22 has a conical shape that defines the conical portion 17, for guiding and self-centering the insertion of a stump 12, upon assembly.

[0038] Use of the intra-bone section, according to the invention, is evident from the foregoing description and explanation.

[0039] In particular, it is clear that the portions, triangular 18 and hexagonal 19 in cross-section, enable a coupling of a superstructure 11 with the intra-bone section 10 without the risk of relative rotations and it is also clear that the combined presence of such portions enable the use of the intra-bone section with stumps that have a shank end that is triangular in cross-section or hexagonal in cross-section or with both.

[0040] Substantially, the intra-bone section according to the invention can be adapted to numerous types of stumps present on the market.

[0041] Furthermore, the intra-bone section according to the invention is capable of facilitating the assembly of the implants because the conical portion of the seat facilitates the insertion and the centering of the stump.

[0042] In practice it has been found that the invention fully achieves the intended aim and objects by providing an intra-bone section that is capable of ensuring an easy and stable coupling with a stump element and without accidental mutual rotation, compatible with most of the stump elements present on the market nowadays.

[0043] The invention, thus conceived, is susceptible of numerous modifications and variations, all of which are within the scope of the appended claims. Moreover, all the details may be substituted by other, technically equivalent elements.

[0044] In practice the materials employed, provided they are compatible with the specific use, and the contingent dimensions and shapes, may be any according to requirements and to the state of the art.

[0045] The disclosures in Italian Patent Application No. 102017000011793 (UA2017A000674) from which this application claims priority are incorporated herein by reference.