Artificial joint components including synovial fluid deflecting structures and particle retaining structures

• US 8,795,378 B2
• Filed: 09/28/2012
• Issued: 08/05/2014
• Est. Priority Date: 09/27/2012
• Status: Active Grant

• Current Assignee: Elwha LLC (Intellectual Ventures LLC)
• Original Assignee: Elwha LLC (Intellectual Ventures LLC)
• Inventors: Boyden, Edward S., Della Rocca, Gregory J., Hawkins, Daniel, Hyde, Roderick A., Langer, Robert, Leuthardt, Eric C., Myckatyn, Terence, Parikh, Parag Jitendra, Rivet, Dennis J., Shimony, Joshua S., Smith, Michael A., Tegreene, Clarence T.
• Primary Examiner(s): STEWART, JASON-DENNIS NEILKEN
• Application Number:
  US13/629,918
• Publication Number:
  US 20140088718A1
• Time in Patent Office: 676 Days
• Field of Search: 623/11.11, 623/16.11, 623/18.11, 623 1911- 1914, 623 2014- 2016, 623/20.21, 623 2211- 2239
• US Class Current: 623/18.11
• CPC Class Codes: A61F 2/30 Joints
• CPC Class Codes: A61F 2/30742 Bellows or hose-like seals; Sealing membranes A61B17/8808 takes precedence; sealing membranes for retaining bone substitute A61F2/2846
• CPC Class Codes: A61F 2/32 for the hip
• CPC Class Codes: A61F 2/38 for elbows or knees
• CPC Class Codes: A61F 2/40 for shoulders
• CPC Class Codes: A61F 2/482 Electrical means
• CPC Class Codes: A61F 2002/30079 magnetic
• CPC Class Codes: A61F 2002/30087 piezoelectric
• CPC Class Codes: A61F 2002/30558 Force-limiting means
• CPC Class Codes: A61F 2002/30673 Lubricating means, e.g. synovial pocket
• CPC Class Codes: A61F 2002/30682 Means for preventing migration of particles released by the joint, e.g. wear debris or cement particles
• CPC Class Codes: A61F 2002/30683 Means for collecting wear particles in a hollow cavity inside the prosthesis
• CPC Class Codes: A61F 2002/3082 Grooves
• CPC Class Codes: A61F 2002/3092 having an open-celled or open-pored structure
• CPC Class Codes: A61F 2002/3429 with an integral peripheral collar or flange, e.g. oriented away from the shell centre line
• CPC Class Codes: A61F 2002/3631 with an integral complete or partial peripheral collar or bearing shoulder at its base

Abstract

Artificial joint prostheses, including hip, knee and shoulder joints, are described. In some aspects, an artificial joint prosthesis includes: a bone-facing surface of an artificial joint prosthesis, the bone-facing surface configured to face a bone-prosthesis interface in vivo; a non-contact surface of the artificial joint prosthesis, the non-contact surface adjacent to the bone-facing surface of the artificial joint prosthesis; at least one fluid deflection structure attached to the non-contact surface, the fluid deflection structure positioned to direct a flow of synovial fluid away from the bone-prosthesis interface in vivo; and at least one particle retaining structure positioned to contact the directed flow of synovial fluid and configured to retain particles present within the synovial fluid.

Claims

1. An artificial joint prosthesis, comprising:

a bone-facing surface of an artificial joint prosthesis, the bone-facing surface configured to face a bone-prosthesis interface in vivo;

a non-load bearing surface of the artificial joint prosthesis, the non-load bearing surface adjacent to the bone-facing surface of the artificial joint prosthesis;

at least one fluid deflection structure attached to the non-load bearing surface, the at least one fluid deflection structure including at least one flange structure positioned to extend from the non-load bearing surface, the at least one flange structure including a first end connected to the non-load bearing surface and a second end distal to the non-load bearing surface, wherein the at least one flange structure is widest at the first end and narrowest at the second end, the fluid deflection structure positioned to direct a flow of synovial fluid away from the bone-prosthesis interface in vivo during physiological movement of the artificial joint prosthesis; and

at least one particle retaining structure positioned to contact the directed flow of synovial fluid and configured to retain non-physiological particles present within the synovial fluid.

2. An artificial joint prosthesis, comprising:

a bone-facing surface of an artificial joint prosthesis, the bone-facing surface configured to face a bone-prosthesis interface in vivo;

a non-contact surface of the artificial joint prosthesis, the non-contact surface adjacent to the bone-facing surface of the artificial joint prosthesis;

at least one fluid deflection structure attached to the non-contact surface, the at least one fluid deflection structure including at least one flange structure positioned to extend from the non-contact surface, the at least one flange structure including a first end connected to the non-contact surface and a second end distal to the non-contact surface, wherein the at least one flange structure is widest at the first end and narrowest at the second end, the fluid deflection structure positioned to direct a flow of synovial fluid away from the bone-prosthesis interface in vivo; and

at least one particle retaining structure positioned to contact the directed flow of synovial fluid and configured to retain particles present within the synovial fluid.

3. The artificial joint prosthesis of claim 2, wherein the at least one particle retaining structure comprises:

a mesh-like structure.

4. The artificial joint prosthesis of claim 2, wherein the at least one particle retaining structure comprises:

a filter structure.

5. The artificial joint prosthesis of claim 2, wherein the at least one particle retaining structure comprises:

a foam structure.

6. The artificial joint prosthesis of claim 2, wherein the at least one particle retaining structure comprises:

a group of projections, each of the projections positioned to contact the flow of synovial fluid and configured to retain particles present within the synovial fluid.

7. The artificial joint prosthesis of claim 2, wherein the at least one particle retaining structure comprises:

a hydrophobic surface.

8. The artificial joint prosthesis of claim 2, wherein the at least one particle retaining structure comprises:

at least one antibody affixed to a surface of the particle retaining structure.

9. The artificial joint prosthesis of claim 2, wherein the at least one particle retaining structure is affixed to a plurality of surfaces of the artificial joint prosthesis.

10. The artificial joint prosthesis of claim 2, comprising:

at least two components, a first component which includes at least one fluid deflection structure affixed to a non-contact surface, and a second component which includes at least one particle retaining structure affixed to a non-contact surface.

11. A hip joint prosthesis, comprising:

a bone-facing surface of a hip joint prosthesis, the bone-facing surface configured to face a bone-prosthesis interface in vivo;

a non-contact surface of the hip joint prosthesis, the non-contact surface adjacent to the bone-facing surface of the hip joint prosthesis;

at least one fluid deflection structure attached to the non-contact surface, the at least one fluid deflection structure including at least one flange structure positioned to extend from the non-contact surface, the at least one flange structure including a first end connected to the non-contact surface and a second end distal to the non-contact surface, wherein the at least one flange structure is widest at the first end and narrowest at the second end, the fluid deflection structure positioned to direct a flow of synovial fluid away from the bone-prosthesis interface in vivo; and

at least one particle retaining structure positioned to contact the directed flow of synovial fluid and configured to retain particles present within the synovial fluid.

12. The hip joint prosthesis of claim 11, wherein the at least one particle retaining structure comprises:

a mesh-like structure.

13. The hip joint prosthesis of claim 11, wherein the at least one particle retaining structure comprises:

a filter structure.

14. The hip joint prosthesis of claim 11, wherein the at least one particle retaining structure comprises:

a foam structure.

15. The hip joint prosthesis of claim 11, wherein the at least one particle retaining structure comprises:

a group of projections, each of the projections positioned to contact the flow of synovial fluid and configured to retain particles present within the synovial fluid.

16. The hip joint prosthesis of claim 11, wherein the at least one particle retaining structure comprises:

a hydrophobic surface.

17. The hip joint prosthesis of claim 11, wherein the at least one particle retaining structure comprises:

at least one antibody affixed to a surface of the particle retaining structure.

18. The hip joint prosthesis of claim 11, wherein the at least one particle retaining structure comprises:

a structure configured to retain non-physiological particles present in the synovial fluid.

19. The hip joint prosthesis of claim 11, wherein the at least one particle retaining structure is affixed to a plurality of surfaces of the hip joint prosthesis.

20. The hip joint prosthesis of claim 11, comprising:

at least two components, a first component which includes at least one fluid deflection structure affixed to a non-contact surface, and a second component which includes at least one particle retaining structure affixed to a surface.

21. A knee joint prosthesis, comprising:

a bone-facing surface of a knee joint prosthesis, the bone-facing surface configured to face a bone-prosthesis interface in vivo;

a non-contact surface of the knee joint prosthesis, the non-contact surface adjacent to the bone-facing surface of the knee joint prosthesis;

at least one fluid deflection structure attached to the non-contact surface, the at least one fluid deflection structure including at least one flange structure positioned to extend from the non-contact surface, the at least one flange structure including a first end connected to the non-contact surface and a second end distal to the non-contact surface, wherein the at least one flange structure is widest at the first end and narrowest at the second end, the fluid deflection structure positioned to direct a flow of synovial fluid away from the bone-prosthesis interface in vivo; and

at least one particle retaining structure positioned to contact the directed flow of synovial fluid and configured to retain particles present within the synovial fluid.

22. The knee joint prosthesis of claim 21, wherein the at least one particle retaining structure comprises:

a mesh-like structure.

23. The knee joint prosthesis of claim 21, wherein the at least one particle retaining structure comprises:

a filter structure.

24. The knee joint prosthesis of claim 21, wherein the at least one particle retaining structure comprises:

a foam structure.

25. The knee joint prosthesis of claim 21, wherein the at least one particle retaining structure comprises:

a group of projections, each of the projections positioned to contact the flow of synovial fluid and configured to retain particles present within the synovial fluid.

26. The knee joint prosthesis of claim 21, wherein the at least one particle retaining structure comprises:

a hydrophobic surface.

27. The knee joint prosthesis of claim 21, wherein the at least one particle retaining structure comprises:

at least one antibody affixed to a surface of the particle retaining structure.

28. The knee joint prosthesis of claim 21, wherein the at least one particle retaining structure comprises:

a structure configured to retain non-physiological particles present in the synovial fluid.

29. The knee joint prosthesis of claim 21, wherein the at least one particle retaining structure is affixed to a plurality of surfaces of the knee joint prosthesis.

30. The knee joint prosthesis of claim 21, comprising:

at least two components, a first component which includes at least one fluid deflection structure affixed to a non-contact surface, and a second component which includes at least one particle retaining structure affixed to a non-contact surface.

31. A shoulder joint prosthesis, comprising:

a bone-facing surface of a shoulder joint prosthesis, the bone-facing surface configured to face a bone-prosthesis interface in vivo;

a non-contact surface of the shoulder joint prosthesis, the non-contact surface adjacent to the bone-facing surface of the shoulder joint prosthesis;

at least one fluid deflection structure attached to the non-contact surface, the at least one fluid deflection structure including at least one flange structure positioned to extend from the non-contact surface, the at least one flange structure including a first end connected to the non-contact surface and a second end distal to the non-contact surface, wherein the at least one flange structure is widest at the first end and narrowest at the second end, the fluid deflection structure positioned to direct a flow of synovial fluid away from the bone-prosthesis interface in vivo; and

at least one particle retaining structure positioned to contact the directed flow of synovial fluid and configured to retain particles present within the synovial fluid.

32. The shoulder joint prosthesis of claim 31, wherein the at least one particle retaining structure comprises:

a mesh-like structure.

33. The shoulder joint prosthesis of claim 31, wherein the at least one particle retaining structure comprises:

a filter structure.

34. The shoulder joint prosthesis of claim 31, wherein the at least one particle retaining structure comprises:

a foam structure.

35. The shoulder joint prosthesis of claim 31, wherein the at least one particle retaining structure comprises:

a group of projections, each of the projections positioned to contact the flow of synovial fluid and configured to retain particles present within the synovial fluid.

36. The shoulder joint prosthesis of claim 31, wherein the at least one particle retaining structure comprises:

a hydrophobic surface.

37. The shoulder joint prosthesis of claim 31, wherein the at least one particle retaining structure comprises:

at least one antibody affixed to a surface of the particle retaining structure.

38. The shoulder joint prosthesis of claim 31, wherein the at least one particle retaining structure is affixed to a plurality of surfaces of the shoulder joint prosthesis.

39. The shoulder joint prosthesis of claim 31, comprising:

at least two components, a first component which includes at least one fluid deflection structure affixed to a non-contact surface, and a second component which includes at least one particle retaining structure affixed to a non-contact surface.