BONE AUGMENTATION PIECE AND KIT CONSISTING OF A BONE AUGMENTATION PIECE WITH AN INSERTED (DENTAL) IMPLANT

Abstract

The invention relates to a bone augmentation piece (1) for filling out a defective area (2) in a bone (3), comprising a main part (5) which is designed to be inserted into said defective area (2) without a gap, wherein the main part (5) comprises a truss-type structure made of webs (6) and cavities (7). The invention also relates to a kit consisting of a bone augmentation piece (1) of this type, comprising an implant inserted thereinto, such as a dental implant. The invention also relates to the use of the claimed bone augmentation piece (1) as a drill jig (18).

Claims

1. A bone augmentation piece for filling out a defective area in a bone, comprising a main part which is adapted to be inserted into the defective area without a gap, wherein the main part comprises a truss-type structure made of webs and cavities which define meshes, contains or is made up from biodegradable metallic materials and/or resorbable polymers or ceramic materials, and the webs and meshes are surrounded on the outside by a rim, the rim having more than five times the thickness of a web.

2. The bone augmentation piece 44 according to claim 1, wherein plural webs are intersecting and are interconnected at the intersection point.

3. The bone augmentation piece 44 according to claim 1, wherein the webs form a grid structure in which the majority of the meshes has an equal surface area.

4. The bone augmentation piece according to claim 3, wherein the meshes take a triangular shape or a rectangular shape.

5. The bone augmentation piece according to claim 1, wherein the webs are identical as to their geometry and/or as to the material properties.

6. The bone augmentation piece according to claim 1, wherein the webs are linear/straight or corrugated or curved.

7. The bone augmentation piece according to claim 1, wherein the webs and meshes define a wall designed in the form of a pocket.

8. The bone augmentation piece according to claim 2, wherein the thickness of the webs ranges from one quarter to one tenth of the length of the webs between two intersection points.

9. A kit consisting of a bone augmentation piece according to claim 1 comprising an implant inserted thereinto.

10. Use of the bone augmentation piece according to claim 1 as a drill jig.

11. The bone augmentation piece according to claim 2, wherein the webs form a grid structure in which the majority of the meshes has an equal surface area.

Description

[0034] Hereinafter, the invention shall be illustrated in detail by way of a drawing, wherein:

[0035] FIG. 1 shows a side view of a bone augmentation piece having a peripheral rim present in the main part within which the numerous webs thereof arranged equidistantly relative to one another form a grid structure,

[0036] FIG. 2 shows a perspective view of the side of the bone augmentation piece from FIG. 1 facing the bone which includes a pocket formed for being filled up with bone slurry/chips at the lower side of the implant and an opening provided at the top,

[0037] FIG. 3 shows a grid structure of the augmentation piece without a peripheral rim,

[0038] FIG. 4 shows a grid structure comparable to that of FIG. 3, however having a peripheral rim,

[0039] FIG. 5 shows a schematic structure of a pocket as shown in FIG. 2,

[0040] FIG. 6 shows the use of the bone augmentation piece as drill jig, and

[0041] FIG. 7 shows a predetermined over-correction by means of the bone augmentation piece as well as

[0042] FIG. 8 shows the inserted condition of the bone augmentation piece shown in FIGS. 1 and 2 in a patient's mandible.

[0043] The figures a merely schematic. Like elements are provided with like reference numerals. Features of the individual example embodiments may be interchanged.

[0044] In FIG. 1, a bone augmentation piece 1 according to the invention is illustrated in accordance with the invention. It is a bone implant. In particular, it is a bone implant which is adapted for use in the mandible. It could also be used, after being slightly adapted, in the maxillary area.

[0045] In anticipation of FIG. 8, it is already described that the bone augmentation piece 1 fills out a defective area 2 in the bone 3. It is inserted into the defective area 2 which may be in the form of a blind hole or through-hole without a slit/without a gap. In the present case, it is flush with the surface of the bone 3. It is configured for a smooth transition into the bone 3, i.e. for abutment of the surfaces of the bone augmentation piece, on the one hand, and of the bone 3, on the other hand, viz. on the inner face and on the outer face. There may also be provided a small protrusion (either on one surface or on both surfaces), as illustrated in FIG. 7 and denoted with the reference numeral 4.

[0046] Returning to FIG. 1, it is evident that the bone augmentation piece 1 has a main part 5 made from a plurality of intersecting webs 6. The webs 6 may also be referred to as strands. A plurality of cavities 7 defining meshes 8 is provided between the webs 6.

[0047] The webs 6 are intersecting in a truss-type, e.g. rectangular, manner to create a grid structure.

[0048] As is evident from the alternative example embodiment of FIG. 2, the meshes 8 are not necessarily rectangular but may also be triangular. The main part 5 also includes, apart from the webs 6 and the meshes 8 formed by the latter, a closed rim 9. In the present case, the rim 9 has more than five times the thickness of a web 6. It is of advantage when the rim 9 has eleven times the thickness (+/−10 to 20%) of a web 6.

[0049] In FIGS. 1 and 2 intersection points 10 are referenced by way of example.

[0050] The webs 6 and the meshes 8 formed by the latter, which comprise the rim 9 if the latter is present, define a wall 11 or plural walls 11 by means of which a pocket 12 is formed.

[0051] It is striking that two implant receiving holes 13 are provided. In addition, there are also provided bone fastening holes 14. While in the implant receiving hole 13 another implant, such as a dental implant, is inserted and is fastened to the bone 3 and/or to the main part 5, a fastener such as a screw, a splint or a bolt fixing the main part 5 on the bone 3 can be introduced to the bone fastening hole 14. The bone fastening hole 14 may be arranged at least partially or even completely inside the implant receiving hole 13. Of course, it may be arranged outside thereof as well. The bone fastening hole 14 is especially preferred to partially penetrate a hole wall 15 defining the implant receiving hole 13.

[0052] In FIGS. 3 and 4, different web arrangements for a main part 5 are indicated, with a rim 9 being provided in one case (see FIG. 4) and missing in another case.

[0053] FIG. 5 illustrates a bone augmentation piece 1 comprising a main part 5 in the form of a pocket 12. Accordingly, bone chips and, resp., bone slurry 16 is/are filled into the pocket 12. Furthermore, blood products may be added.

[0054] In FIG. 3, a bone augmentation piece 1 being inserted in a defective area 2 of a bone 3 is represented. It is evident that the implant receiving holes 13 are inserted to predetermine the forced direction for a drill 17 so that the bone augmentation piece 1 acts as a drill jig 18. The countersinks 19 leading further into the bone then are utilized to be penetrated by a dental implant (not shown).

[0055] FIG. 7 illustrates the mandible as an example of a bone 3 in cross-section and an inserted bone augmentation piece 1 according to the invention is reproduced in a partially cut state. Here a protrusion 4 is provided. Said protrusion 4 is degraded, just as the remaining bone augmentation piece 1, by the body of the patient during the healing process, wherein only in the area shown in a cut state, however, which can also be defined as remaining area 20, autologous bone material is present after healing so that an esthetically appealing result is achieved.

LIST OF REFERENCE NUMERALS

[0056] 1 bone augmentation piece [0057] 2 defective area [0058] 3 bone [0059] 4 protrusion [0060] 5 main part [0061] 6 web [0062] 7 cavity [0063] 8 mesh [0064] 9 rim [0065] 10 intersection point [0066] 11 wall [0067] 12 pocket [0068] 13 implant receiving hole [0069] 14 bone fastening hole [0070] 15 hole wall [0071] 16 bone slurry/bone chip [0072] 17 drill [0073] 18 drill jig [0074] 19 countersink [0075] 20 remaining area