Orthopedic hole filler

• US 20050090828A1
• Filed: 08/04/2004
• Published: 04/28/2005
• Est. Priority Date: 08/04/2003
• Status: Abandoned Application

• Current Assignee: Rhode Island Hospital
• Original Assignee: Rhode Island Hospital
• Inventors: Alford, J. Winslow
• Application Number:
  US10/911,936
• Publication Number:
  US 20050090828A1
• Time in Patent Office: Days
• US Class Current: 623/16.11
• CPC Class Codes: A61B 17/863 with thread interrupted or changing its form along shank, other than constant taper
• CPC Class Codes: A61B 17/8645 Headless screws, e.g. ligament interference screws
• CPC Class Codes: A61B 17/866 Material or manufacture
• CPC Class Codes: A61B 2017/00004 (bio)absorbable, (bio)resorbable, resorptive for implantable prostheses A61F2210/0004
• CPC Class Codes: A61B 2017/564 Methods for bone or joint treatment

Abstract

A method of inhibiting formation of a stress riser in a bone is provided. The method is comprised of providing a bone having a first device and replacing the first device with a second device. Both the first device and the second device are substantially cylindrical, with the diameter of the second device being larger than that of the first device. Formation of a stress riser is inhibited in the presence of the second device.

Claims

1. A method of inhibiting formation of a stress riser in a bone, comprising providing a bone, said bone comprising a first device and replacing said first device with a second device, wherein said first device and said second device are substantially cylindrical, the diameter of said second device being larger than that of said first device and wherein formation of a stress riser is inhibited in the presence of said second device.

2. The method of claim 1 wherein said first device is metallic and said second device is non-metallic.

3. The method of claim 1, wherein the second device is biodegradable.

4. The method of claim 1, wherein the second device is non-biodegradable.

5. The method of claim 1, wherein the second device is replaced by bone or incorporated by native bone.

6. The method of claim 1, wherein the second device comprises a non-rigid solid composition.

7. The method of claim 1, wherein the second device comprises a polymer.

8. The method of claim 1, wherein the second device comprises a polylactic acid.

9. The method of claim 1, wherein the second device comprises a polyglycolic acid.

10. The method of claim 1, wherein the second device comprises a polylactic acid and a polyglycolic acid.

11. The method of claim 10, wherein the second device further comprises tricalcium phosphate.

12. The method of claim 1 wherein the second device comprises a porous metal.

13. The method of claim 1, wherein said bone is a weight bearing bone.

14. The method of claim 1, wherein said bone is selected from the group consisting of a femur, a tibia and a forearm.

15. The method of claim 1, wherein said second device is in the shape of a screw.

16. The method of claim 15, wherein said second device has a length, and wherein threads extend along the length of the second device.

17. A method of inhibiting refracture of a previously fractured bone, comprising filling an aperture in said bone, said aperture having been occupied by a first device and wherein filling said aperture comprises filling with a second device, and wherein refracture of said bone is inhibited in the presence of said second device.

18. The method of claim 17, wherein said first device and said second device are substantially cylindrical and wherein the diameter of said second device is greater or can expand to become greater than that of said first device.

19. The method of claim 17, wherein the second device is biodegradable.

20. The method of claim 17, wherein the second device is non-biodegradable.

21. The method of claim 17, wherein the second device is replaced by bone.

22. The method of claim 17, wherein the second device comprises a non-rigid solid composition.

23. The method of claim 17, wherein the second device comprises a polymer.

24. The method of claim 17, wherein the second device comprises a polylactic acid.

25. The method of claim 17, wherein the second device comprises a polyglycolic acid.

26. The method of claim 17, wherein the second device comprises a polylactic acid and a polyglycolic acid.

27. The method of claim 17, wherein said bone is a weight bearing bone.

28. The method of claim 27, wherein said weight bearing bone is selected from the group consisting of a femur and a tibia.

29. The method of claim 17, wherein said second device is in the shape of a screw.

30. The method of claim 29, wherein said second device has a length, and wherein threads extend along the length of the second device.

31. A bicortical device for inhibiting a stress riser in a bone, the bicortical device linking two cortices of a bone and comprising a non-metallic expandable composition having varying lengths that correspond to a relative thickness of said bone, and the bicortical device further comprising a cylindrical shaft portion for implantation into said bone.

32. The bicortical device of claim 31, wherein said cylindrical shaft portion comprises threads along the length of said shaft portion.

33. The bicortical device of claim 31, wherein said non-metallic expandable composition is a biodegradable material.

34. The bicortical device of claim 31, wherein said non-metallic expandable composition is a non-biodegradable material.

35. The bicortical device of claim 34, wherein said non-metallic expandable composition comprises a solid having elastomeric properties.

36. The bicortical device of claim 31, wherein at least a portion of a composition of the device is comprised of a polymer.

37. The bicortical device of claim 31, wherein at least a portion of a composition of the device is comprised of a polylactic acid.

38. The bicortical device of claim 31, wherein at least a portion of a composition of the device is comprised of a polyglycolic acid.

39. The bicortical device of claim 31, wherein at least a portion of a composition of the device further comprises tricalcium phosphate.

40. The bicortical device of claim 31, wherein said non-metallic expandable composition includes a polylactic acid and a polyglycolic acid.

41. The bicortical device of claim 31, wherein said bone is a weight bearing bone.

42. The bicortical device of claim 31, wherein said weight bearing bone is selected from the group consisting of a femur, a tibia, and a forearm bone.