Arthroplasty devices and related methods

• US 20070226986A1
• Filed: 01/19/2007
• Published: 10/04/2007
• Est. Priority Date: 02/15/2006
• Status: Active Grant

• Current Assignee: Howmedica Osteonics Corp. (Stryker Corporation)
• Original Assignee: Howmedica Osteonics Corp. (Stryker Corporation)
• Inventors: Howell, Stephen, Park, Ilwhan, Chi, Charlie
• Granted Patent: US 9,017,336 B2
• Time in Patent Office: Days
• US Class Current: 29/592
• CPC Class Codes: A61B 17/154 for preparing bone for knee prosthesis
• CPC Class Codes: A61B 17/155 Cutting femur
• CPC Class Codes: A61B 17/157 Cutting tibia
• CPC Class Codes: A61B 17/1675 for the knee
• CPC Class Codes: A61B 17/1739 specially adapted for particular parts of the body
• CPC Class Codes: A61B 17/1742 for the hip
• CPC Class Codes: A61B 17/1764 for the knee
• CPC Class Codes: A61B 17/1778 for the shoulder
• CPC Class Codes: A61B 2034/108 Computer aided selection or customisation of medical implants or cutting guides
• CPC Class Codes: A61B 34/70 Manipulators specially adapted for use in surgery
• CPC Class Codes: Y10T 29/49 Method of mechanical manufacture

Abstract

Arthroplasty jigs, arthroplasty jig blanks, and related methods and devices are disclosed. Some variations of the methods comprise forming an arthroplasty jig from a near-shape arthroplasty jig blank, where the near-shape arthroplasty jig blank has at least one feature specific to a target site to be matched by the arthroplasty jig. Certain of the methods comprise forming an arthroplasty jig having a first configuration from a near-shape arthroplasty jig blank having a second configuration approximating the first configuration. Some of the methods comprise forming a near-shape arthroplasty jig blank, where the near-shape arthroplasty jig blank is configured to be formed into an arthroplasty jig, and the near-shape arthroplasty jig blank has at least one feature specific to a target site to be matched by the arthroplasty jig.

Claims

1. A method comprising:

forming an arthroplasty jig from a near-shape arthroplasty jig blank,

wherein the near-shape arthroplasty jig blank has at least one feature specific to a target site to be matched by the arthroplasty jig.

2. The method of claim 1, wherein the arthroplasty jig comprises a knee arthroplasty jig.

3. The method of claim 2, wherein the target site to be matched by the arthroplasty jig comprises a left knee.

4. The method of claim 2, wherein the target site to be matched by the arthroplasty jig comprises a right knee.

5. The method of claim 2, wherein the target site to be matched by the arthroplasty jig comprises a valgus knee.

6. The method of claim 2, wherein the target site to be matched by the arthroplasty jig comprises a varus knee.

7. The method of claim 2, wherein the target site to be matched by the arthroplasty jig comprises a neutral knee.

8. The method of claim 2, wherein the target site to be matched by the arthroplasty jig comprises a femur.

9. The method of claim 2, wherein the target site to be matched by the arthroplasty jig comprises a tibia.

10. The method of claim 2, wherein the knee arthroplasty jig comprises a femoral arthroplasty jig.

11. The method of claim 2, wherein the knee arthroplasty jig comprises a tibial arthroplasty jig.

12. The method of claim 1, wherein the arthroplasty jig that is formed from the near-shape arthroplasty jig blank is a customized arthroplasty jig.

13. The method of claim 1, further comprising adding at least one patient-specific feature to the near-shape arthroplasty jig blank to form the arthroplasty jig.

14. The method of claim 13, wherein the at least one patient-specific feature comprises a cavity.

15. The method of claim 13, wherein the at least one patient-specific feature is added to the near-shape arthroplasty jig blank using a milling process.

16. The method of claim 1, wherein forming the arthroplasty jig from the near-shape arthroplasty jig blank comprises machining the near-shape arthroplasty jig blank.

17. A method comprising:

forming an arthroplasty jig having a first configuration from a near-shape arthroplasty jig blank having a second configuration approximating the first configuration.

18. The method of claim 17, wherein the arthroplasty jig comprises a knee arthroplasty jig.

19. A method comprising:

forming a near-shape arthroplasty jig blank,

wherein the near-shape arthroplasty jig blank is configured to be formed into an arthroplasty jig, and the near-shape arthroplasty jig blank has at least one feature specific to a target site to be matched by the arthroplasty jig.

20. The method of claim 19, wherein the arthroplasty jig comprises a knee arthroplasty jig.

21. The method of claim 19, wherein the method comprises forming a plurality of near-shape arthroplasty jig blanks that are configured to be formed into arthroplasty jigs, and the near-shape arthroplasty jig blanks have at least one feature specific to a target site to be matched by the arthroplasty jigs.

22. The method of claim 19, wherein the near-shape arthroplasty jig blank is formed using injection-molding technology.

23. A near-shape arthroplasty jig blank comprising:

a jig blank body,

wherein the near-shape arthroplasty jig blank is configured to be formed into an arthroplasty jig, and the near-shape arthroplasty jig blank has at least one feature specific to a target site to be matched by the arthroplasty jig.

24. The jig blank of claim 23, wherein the arthroplasty jig comprises a knee arthroplasty jig.

25. The jig blank of claim 24, wherein the target site to be matched by the arthroplasty jig comprises a left knee.

26. The jig blank of claim 24, wherein the target site to be matched by the arthroplasty jig comprises a right knee.

27. The jig blank of claim 24, wherein the target site to be matched by the arthroplasty jig comprises a valgus knee.

28. The jig blank of claim 24, the target site to be matched by the arthroplasty jig comprises a varus knee.

29. The jig blank of claim 24, the target site to be matched by the arthroplasty jig comprises a neutral knee.

30. The jig blank of claim 24, the target site to be matched by the arthroplasty jig comprises a femur.

31. The jig blank of claim 24, the target site to be matched by the arthroplasty jig comprises a tibia.

32. A surface-matching device comprising:

at least one block; and

at least one pin extending from a portion of the at least one block,

wherein the surface-matching device is configured to position an arthroplasty jig at a target site in a body of a subject.

33. The surface-matching device of claim 32, wherein the at least one pin comprises a plurality of pins.

34. The surface-matching device of claim 32, wherein the at least one pin comprises an end that is configured to contact at least one of bone and cartilage when the surface-matching device is positioned at a target site in a body of a subject.

35. The surface-matching device of claim 32, wherein the surface-matching device is configured to position a knee arthroplasty jig at a target site in a knee of a subject.

36. A method comprising:

positioning a surface-matching device at a target site in a body of a subject,

wherein the surface-matching device comprises at least one block and at least one pin extending from a portion of the at least one block, and the surface-matching device is configured to position an arthroplasty jig at a target site in a body of a subject.

37. The method of claim 36, further comprising using the surface-matching device to position an arthroplasty jig at the target site in the body of the subject.

38. The method of claim 36, wherein the arthroplasty jig comprises a knee arthroplasty jig.

39. The method of claim 36, wherein the target site is located in a knee of the subject.