Supporting grid

• US 5,730,743 A
• Filed: 02/11/1997
• Issued: 03/24/1998
• Est. Priority Date: 05/25/1994
• Status: Expired due to Fees

• Current Assignee: Axel Kirsch, Walter Durr
• Original Assignee: Axel Kirsch, Walter Durr
• Inventors: Durr, Walter, Kirsch, Axel
• Primary Examiner(s): Tucker, Guy V.
• Application Number:
  US08/750,032
• Time in Patent Office: 406 Days
• Field of Search: 606/69, 606/70, 606/71, 606/60, 606/72, 606/76, 606/77, 606/86, 606/213, 606/215, 433/173, 433/174
• US Class Current: 606/284
• CPC Class Codes: A61B 17/8085 with pliable or malleable elements or having a mesh-like structure, e.g. small strips A61B17/8071, A61B17/8076 take precedence
• CPC Class Codes: A61F 2/2803 for mandibular reconstruction temporo-mandibular joints A61F2/3099; bone plates for the jaw A61B17/8071
• CPC Class Codes: A61F 2/2846 Support means for bone substitute or for bone graft implants, e.g. membranes or plates for covering bone defects nets or sleeves applied to surface of endoprostheses A61F2/30907; bone plates A61B17/80; bone regeneration in dental surgery A61C8/0006
• CPC Class Codes: A61F 2002/2835 Bone graft implants for filling a bony defect or an endoprosthesis cavity, e.g. by synthetic material or biological material
• CPC Class Codes: A61F 2002/30576 with extending fixation tabs
• CPC Class Codes: A61F 2002/30594 slotted, e.g. radial or meridian slot ending in a polar aperture, non-polar slots, horizontal or arcuate slots
• CPC Class Codes: A61F 2002/30909 Nets
• CPC Class Codes: A61F 2013/00357 implanted wound fillings or covers
• CPC Class Codes: A61F 2310/00293 containing a phosphorus-containing compound, e.g. apatite
• CPC Class Codes: Y10S 606/904 Jaw plate

Abstract

Supporting grid for the mechanical support of a cover membrane, which membrane covers a bone void filled with a bone replacement material such as hydroxyl apatite granules, particularly a recess in the proper bone tissue of the body, characterized in that the supporting grid is bendable around at least one axis predetermined by the fashioning of the supporting grid.

Claims

1. Supporting grid for the mechanical support of a cover membrane covering a bone void filled with a bone replacement material including hydroxyl apatite granules, said void including a recess in the proper bone tissue of the body, the improvement comprising said supporting grid having an outside contour of an annular sector with an outside arc and an inside arc, said supporting grid being bendable in a direction parallel to a surface normal of the supporting grid in an original condition around at least one line, which is located in a plane of the supporting grid, said grid having recesses along the inside arc and along the outside arc with each of the recesses at the inside arc having a narrow channel extending radially inward from the inside arc, then expanding slightly in a circular fashion and then in turn tapering down to a minimum width channel again over a small region and then expanding greatly and subsequently tapering conically.

2. Supporting grid according to claim 1, wherein the recesses along the inside arc are preferably arranged offset relative to the recesses along the outside arc.

3. Supporting grid according to claim 1, wherein the recesses along the inside arc and the recesses along the outside arc respectively have a uniform shape.

4. Supporting grid according to claim 1, wherein the shape of the recesses along the inside arc differs from the shape of the recesses along the outside arc.

5. Supporting grid according to claim 1, wherein each of the recesses has a radial symmetry axis.

6. Supporting grid according to claim 5, wherein the recesses at the inside arc transverse to the radial symmetry axis in the immediate proximity of said inside arc are broader than the recesses at the outside arc in the immediate proximity thereof.

7. Supporting grid according to claim 1, wherein the bases of the conical sections of the recesses at the inside arc are preferably located on nearly the same radius as the tips of the conical sections of the recesses at the outside arc.

8. Supporting grid according to claim 1, wherein the supporting grid has sub-recesses along the inside and outside arc that are open toward the outside contour.

9. Supporting grid according to claim 1, wherein each of the recesses along the outside arc having a triangular portion with a point directed toward the inside arc and a base of the triangular portion being connected to the outside arc by a narrow channel.

10. Supporting grid for the mechanical support of a cover membrane covering a bone void filled with a bone replacement material including hydroxyl apatite granules, said void including a recess in the proper bone tissue of the body, the improvement comprising said supporting grid having an outside contour of an annular sector with an outside arc and an inside arc, said supporting grid being bendable in a direction parallel to a surface normal of the supporting grid in an original condition around at least one line concentric with the outside arc and being located in a plane of the supporting grid, said supporting grid having recesses along the inside arc with each recess having a circular portion connected to the inside arc by a narrow channel and a triangular portion having a point directed at the outside arc and a base connected by a second channel portion to the circular portion and said grid having recesses along the outside arc.

11. Supporting grid according to claim 10, wherein the recesses along the inside arc are arranged offset relative to the recesses along the outside arc.

12. Supporting grid according to claim 10, wherein the recesses along the inside arc and the recesses along the outside arc respectively have a uniform shape.

13. Supporting grid according to claim 10, wherein the shape of the recesses along the inside arc differs from the shape of the recesses along the outside arc.

14. Supporting grid according to claim 10, wherein each of the recesses has a radial symmetry axis.

15. Supporting grid according to claim 14, wherein the recesses at the inside arc transverse to the radial symmetry axis in the immediate proximity of said inside arc are broader than the recesses at the outside arc in the immediate proximity thereof.

16. Supporting grid according to claim 10, wherein each of the recesses at the outside arc has a triangular portion with a point directed toward the inside arc and a base connected by a channel to the outside arc.

17. Supporting grid according to claim 10, wherein the recesses of the outside arc have a conical portion with a tip directed at the inside arc and a radius and the bases of the triangular portion of the recesses at the inside arc are located adjacent said radius.

18. Supporting grid according to claim 10, wherein the supporting grid has sub-recesses along the inside and outside arc that are open toward the outside contour.