IMPLANT SHAPED TO BE ADAPTED TO BONE STRUCTURE COMPRISING A BASE AND ASSOCIATED PRODUCTION METHOD

Abstract

The invention relates to an implant for attaching to a bone with a support structure which comprises at least one securing portion which follows the bone outer structure and is to be attached to the bone, wherein a base for receiving a prosthesis directly or by using an intermediate part (abutment) projects from the support structure. In addition, the invention also relates to a method for producing an implant, comprising the step of capturing individual patient data, and creating the support structure and/or the base on the basis of the individual patient data.

Claims

1. An implant for attaching to a bone with a support structure creating on the basis of individual patient data, the implant comprising: at least one securing portion which follows the bone outer structure and is to be attached to the bone, wherein more bases for receiving a prosthesis directly or by using an intermediate part projects from the support structure, wherein the bases are integral single-piece components of the support structure, and wherein plural bone from-locking portions surrounding the bone are provided and are geometrically configured and aligned so that the form-locking seat on the bone is enforced and so that seat enforces a stable bearing portion of the implant on the bone.

2. The implant according to claim 1, wherein the base is in the form of an elevation or prominence standing out against the ambient outer contour of the support structure.

3. The implant according to claim 1, wherein the base is prepared for non-positively, positively and/or adhesively receiving the prosthesis or an intermediate part.

4-5. (canceled)

6. The implant according to claim 1, further comprising at least three bone form-locking portions spatially separated from each other.

7-8. (canceled)

9. A method for producing an implant according to claim 1, comprising capturing individual patient data by MRT and/or CT, and creating the support structure and/or the base on the basis of the individual patient data based on CAD data.

Description

[0072] Hereinafter, the invention shall be illustrated in detail by way of drawings showing different variations, wherein

[0073] FIG. 1 shows a spatial representation of the implant in a first embodiment, for the mandible,

[0074] FIG. 2 shows a spatial representation of the implant in a second embodiment, for the mandible,

[0075] FIG. 3 shows an enlarged spatial representation of the implant of the second embodiment, for the mandible,

[0076] FIG. 4 shows a spatial representation of the implant in a third embodiment, for the mandible when viewed from the top,

[0077] FIG. 5 shows a spatial representation of the implant of the third embodiment, for the mandible from a diagonal lateral direction,

[0078] FIG. 6 shows a front view of the implant in a fourth embodiment, for the maxilla,

[0079] FIG. 7 shows a top view of the implant of the fourth embodiment, for the maxilla,

[0080] FIG. 8 shows a spatial representation of the implant in a fifth embodiment, for the maxilla in the implanted state, and

[0081] FIG. 9 shows a side view of the implant of the fifth embodiment, for the maxilla in the implanted state.

[0082] The figures are merely schematic and only serve for the comprehension of the invention. Like elements are provided with like reference numerals. Features of the individual embodiments may also be realized in other embodiments. Consequently, they are interchangeable.

[0083] FIG. 1 illustrates a spatial representation of the implant in a first embodiment for the mandible. The implant 1 consists of a support structure 2 including plural securing portions 3 following the bone outer structure and plural bases 4 formed integrally with the support structure 2.

[0084] The support structure 2 has a grid-like structure 5 consisting of annular portions 6 which are interconnected via lands 7 of different lengths. The support structure 2 is accurately fitted to the bone contour on which it abuts and, resp., bears, and it can be subdivided into a main body 8 and distally extending secondary bodies 9, with the secondary bodies 9 corresponding to the securing portions 3.

[0085] The securing portions 3 extend linearly outwardly away from the main body 8 of the support structure 2. They serve for securing the implant 1 to existing bone structures 10 and, resp., bones, for example by means of screws (not shown), especially osteosynthesis screws, and are configured so that, when abutting on the bone structure 10, they enter into form fit with the latter and constitute so-called bone form-locking portions 11.

[0086] In this embodiment, the implant 1 includes three bases 4 formed integrally with the support structure 2. The bases 4 are hollow-cylindrical and have different heights and inclinations. While the implant 1 is usually placed beneath the oral mucosa and, resp., the periosteum, the bases 4 project therefrom into the oral cavity and in this embodiment serve for receiving an intermediate part (not shown) or a so-called abutment (not shown).

[0087] Via the intermediate part (not shown) the implant 1 is prepared for holding a prosthesis (not shown) via an abutment (not shown) or the intermediate part (not shown) acts as an abutment (not shown).

[0088] FIG. 2 illustrates a spatial view of the implant in a second embodiment, for the mandible. Said second embodiment has, just as the first embodiment, a support structure 2 including plural securing portions 3. In this embodiment, too, the contour of the support structure 2 including the securing portions 3 in advance is exactly adapted to the bone structure 10 on which the implant 1 bears.

[0089] The second embodiment includes bases 4 integrally formed with the support structure 2 each of which includes a ball-shaped distal part 12 spaced apart from a truncated cylinder portion 14 of the base 4 via a tapered area 13.

[0090] Said distal part 12 may have, instead of being ball-shaped, any other possible geometry such as a frustum-shaped, cylindrical, box-shaped, star-shaped etc. geometry.

[0091] The distal part 12 serves as part of a snap-fit connection for receiving/securing the prosthesis (not shown) such as a dental prosthesis, to the implant 1. The prosthesis includes the counter-geometry matching the geometry of the distal part 12.

[0092] FIG. 3 shows an enlarged spatial view of the implant 1 of the second embodiment. This figure clearly reveals that the grid-shaped structure 5 or grid structure 5 is exactly adapted to the bone structure 10. The annular portions 6 of the grid-shaped structure 5 are in the form of a through-hole 15 configured to receive a screw (not shown) to be screwed into the bone structure 10, as afore-described.

[0093] The second embodiment depicted here has two bases 4 including ball-shaped distal parts 12. The enlarged representation clearly reveals that the two bases 4 have both different heights and different angles of inclination of their central and, resp., longitudinal axes M.sub.1 and M.sub.2 relative to the longitudinal axis L.sub.1 of the implant 1.

[0094] The integral formation of the truncated cylinder portion 14 with the distal part 12 spaced apart via the tapered portion 13 allows to realize very small overall heights of the base 4 already which cannot be materialized by a two-part design of the truncated cylinder with an abutment (not shown) adapted to be screwed therein, for example, as a connecting element to the prosthesis by reason of minimum thread lengths.

[0095] FIG. 4 illustrates a spatial view of the implant 1 in a third embodiment for the mandible when viewed from the top. This embodiment equally includes two bases 4 that are formed integrally of a truncated cylinder portion 14 and a distal part 12. In contrast to the implant 1 in the second embodiment, the third embodiment shown here has longer securing portions 3 along a direction of the longitudinal axis L.sub.1 of the implant 1 (at the top in this figure).

[0096] FIG. 5 illustrates a spatial representation of the implant 1 of the third embodiment for the mandible (from FIG. 4), when viewed from a diagonal lateral direction. This view once again illustrates the accurately fitting configuration of the implant contour and, resp., the support structure 2 including securing portions 3 as a counter-geometry to the bone structure 10 located there beneath and, resp., as bone form-locking portions 11. In other words, the contour of the implant 1 and, resp., of the support structure 2 is exactly adapted to the bone structure 10 on which the implant 1 and, resp., the support structure 2 bears in the secured state.

[0097] Said exact shaping assists the operating surgeon in positioning the implant 1 during surgical intervention for inserting the same. In this way, wrong positioning can be avoided and, moreover, additional positioning aids can be largely dispensed with.

[0098] The embodiments one to three of the implant 1 can be applied to partially toothed or toothless mandibles so as to compensate for missing teeth by means of a dental prosthesis which is supported by the implant 1.

[0099] FIG. 6 illustrates a front view of the implant 1 in a fourth embodiment designed for use in the maxilla. The implant 1 equally includes a support structure 2 having securing portions 3. Said support structure 2 has no grid-shaped structure 5, however (cf. FIG. 1 to FIG. 5). The support structure 2 of this embodiment has plural through-holes 15 in the form of bores including a counterbore portion 16 for receiving e.g. countersunk screws (not shown) via which the implant 1 is connected to the bone structure 10 (not shown here, cf. FIG. 1 to FIG. 5).

[0100] Through-holes 15 that are not used for receiving a screw (for securing the implant 1 to the bone structure 10) serve as grow-in areas of bone and soft-tissue structures, thus causing the implant 1 to be so-to-speak united with the bone 10 after some time and in this way a tertiary stability to be formed between the bone 10 and the implant 1.

[0101] From the support structure 2 three downwardly directed bases 4 are extending which take a hollow-cylindrical shape. Each of the bases 4 has a different height being exactly adjusted to the needs of the respective patient when the implant 1 is designed. The bases 4 are not located on a straight line parallel to the longitudinal axis L.sub.2 of the implant 1 but have a different distance from the longitudinal axis L.sub.2 of the implant 1 (cf. also FIG. 7 in this context).

[0102] FIG. 7 shows a top view of the implant 1 of the fourth embodiment for the maxilla. It is clearly evident from this figure that the bases 4 have different distances from the longitudinal axis L.sub.2 of the implant 1: The axes A.sub.3, A.sub.4 and A.sub.5 crossing the center of the bases 4 have different spaces from the longitudinal axis L.sub.2 of the implant 1.

[0103] Moreover, the central axes M.sub.3, M.sub.4 and M.sub.5 have different tilt and inclination angles with the longitudinal axis L.sub.2 of the implant 1. Said angles are equally established when the implant is designed so as to optimally adapt the prosthesis received and supported by the implant 1 to the jaw and/or teeth structure of the respective patient. Apart from the optimum alignment of the implant for the chewing stress, this also enables the prosthesis to optimally join esthetically the partial set of teeth.

[0104] FIG. 8 illustrates a spatial representation of the implant 1 in a fifth embodiment for the maxilla in the implanted state. In the fifth embodiment, the implant 1 again has a grid-shaped support structure 2. The support structure 2 includes plural securing portions 3 which, as to their contour, are adapted to the existing bone structure 10 (corresponding to the bone form-locking portions 11).

[0105] The implant 1 has three bases 4 each of which consists of a hollow-cylindrical truncated cylinder portion 14. In each of the hollow-cylindrical bases 4 an abutment 17 is inserted which consists of a truncated cylinder portion 18 having a ball-shaped distal part 19 formed integrally therewith. For this purpose, the abutment 17 is screwed into the base 4, for example. The ball-shaped distal part 19 serves for connecting the prosthesis (not shown) to the implant 1.

[0106] FIG. 9 shows a side view of the implant of the fifth embodiment for the maxilla in the implanted state. This side view reveals that the central axes M.sub.6, M.sub.7 and M.sub.8 of the respective bases 4 again show different tilt and, resp., inclination angles with a longitudinal axis L.sub.3 of the support structure 2. Moreover, the bases 4 may also have slight curvatures as is evident e.g. at the base 4 with the central axis M.sub.6.

[0107] The embodiment of the implant 1 shown here is used, for example, to provide toothless maxillae with frameworks or support structures 2 for receiving a prosthesis, with the frameworks interconnecting both sides via the palate. In addition, the implant 1 of the fifth embodiment may also be applied to partially toothed maxillae, wherein the implant 1 is capable of treating states of major bone defects (e.g. in the wake of tumor operations with resection of parts of the maxilla).

LIST OF REFERENCE NUMERALS

[0108] 1 implant [0109] 2 support structure [0110] 3 securing portion [0111] 4 base [0112] 5 grid-shaped structure [0113] 6 annular portion [0114] 7 land [0115] 8 main body [0116] 9 secondary body [0117] 10 bone structure [0118] 11 bone form-locking portion [0119] 12 distal part [0120] 13 tapered area [0121] 14 truncated cylinder portion [0122] 15 through-hole [0123] 16 bore including countersunk portion [0124] 17 abutment [0125] 18 truncated cylinder portion [0126] 19 distal part [0127] L.sub.1, L.sub.2, L.sub.3 longitudinal axis [0128] M.sub.1, M.sub.2, M.sub.3, M.sub.4, M.sub.5, M.sub.6, M.sub.7, M.sub.8 central and, resp., longitudinal axis [0129] A.sub.3, A.sub.4, A.sub.5 axis