Compliant fixation for pelvis

• US 20060116775A1
• Filed: 01/05/2006
• Published: 06/01/2006
• Est. Priority Date: 11/01/1993
• Status: Active Grant

• Current Assignee: Biomet Manufacturing, LLC (Zimmer Biomet Holdings, Inc.)
• Original Assignee: Biomet Manufacturing, LLC (Zimmer Biomet Holdings, Inc.)
• Inventors: White, John R., Brown, David R.
• Granted Patent: US 7,476,254 B2
• Time in Patent Office: Days
• US Class Current: 623/22.320
• CPC Class Codes: A61B 17/68 Internal fixation devices , including fasteners and spinal fixators, even if a part thereof projects from the skin bone staples A61B17/0642
• CPC Class Codes: A61B 17/8066 for pelvic reconstruction
• CPC Class Codes: A61B 17/86 Pins or screws or threaded wires; nuts therefor A61B17/72 take precedence
• CPC Class Codes: A61F 2/28 Bones joints A61F2/30
• CPC Class Codes: A61F 2/30721 Accessories
• CPC Class Codes: A61F 2/30749 Fixation appliances for connecting prostheses to the body
• CPC Class Codes: A61F 2/30942 for designing or making customized prostheses, e.g. using templates, CT or NMR scans, finite-element analysis or CAD-CAM techniques
• CPC Class Codes: A61F 2/32 for the hip
• CPC Class Codes: A61F 2/34 Acetabular cups
• CPC Class Codes: A61F 2/36 Femoral heads ; Femoral endoprostheses
• CPC Class Codes: A61F 2/3662 Femoral shafts
• CPC Class Codes: A61F 2002/30329 Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
• CPC Class Codes: A61F 2002/30332 Conically- or frustoconically-shaped protrusion and recess
• CPC Class Codes: A61F 2002/30354 Cylindrically-shaped protrusion and recess, e.g. cylinder of circular basis
• CPC Class Codes: A61F 2002/30372 with additional means for limiting said translation
• CPC Class Codes: A61F 2002/30405 made by screwing complementary threads machined on the parts themselves
• CPC Class Codes: A61F 2002/30433 using additional screws, bolts, dowels, rivets or washers e.g. connecting screws
• CPC Class Codes: A61F 2002/30507 using a threaded locking member, e.g. a locking screw or a set screw
• CPC Class Codes: A61F 2002/30525 Worm gears
• CPC Class Codes: A61F 2002/30538 for adjusting angular orientation
• CPC Class Codes: A61F 2002/3055 : for adjusting length
• CPC Class Codes: A61F 2002/30566 : Helical springs
• CPC Class Codes: A61F 2002/30604 : modular
• CPC Class Codes: A61F 2002/30616 : Sets comprising a plurality of prosthetic parts of different sizes or orientations
• CPC Class Codes: A61F 2002/3069 : Revision endoprostheses
• CPC Class Codes: A61F 2002/30787 : inclined obliquely with respect to each other
• CPC Class Codes: A61F 2002/30878 : with non-sharp protrusions, for instance contacting the bone for anchoring, e.g. keels, pegs, pins, posts, shanks, stems, struts
• CPC Class Codes: A61F 2002/3611 : Heads or epiphyseal parts of femur
• CPC Class Codes: A61F 2220/0025 : Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
• CPC Class Codes: A61F 2220/0033 : made by longitudinally pushing a protrusion into a complementary-shaped recess, e.g. held by friction fit
• CPC Class Codes: A61F 2220/0041 : using additional screws, bolts, dowels or rivets, e.g. connecting screws
• CPC Class Codes: A61F 2250/0006 : for adjusting angular orientation

Abstract

A pelvic implant assembly and associated methods. The implant assembly includes an acetabular component, and a compliant fixator coupling the acetabular component to the pelvis.

Claims

1. A pelvic implant assembly comprising:

an acetabular component; and

a compliant fixator coupling the acetabular component to the pelvis.

2. The pelvic implant assembly of claim 1, wherein the compliant fixator comprises Belleville washers.

3. The pelvic implant assembly of claim 1, wherein the compliant fixator comprises a spring.

4. The pelvic implant assembly of claim 1, further comprising a connector coupling the compliant fixator and the acetabular component.

5. The pelvic implant assembly of claim 4, further comprising a curved surface coupling the connector and the compliant fixator.

6. The pelvic implant assembly of claim 4, further comprising a conical surface coupling the connector and the compliant fixator.

7. The pelvic implant assembly of claim 4, further comprising at least one bone fixator coupling the connector to the pelvis.

8. The pelvic implant assembly of claim 4, further comprising a plate coupled to the connector.

9. The pelvic implant assembly of claim 1, wherein the acetabular component is modular.

10. The pelvic implant assembly of claim 1, wherein the acetabular component is configured for coupling with a femoral prosthesis component.

11. The pelvic implant assembly of claim 1, wherein the acetabular component comprises an acetabular cup.

12. The pelvic implant assembly of claim 11, further comprising a prosthetic femoral head adapted for coupling to the acetabular cup.

13. The pelvic implant assembly of claim 12, further comprising a prosthetic femoral stem adapted for coupling to the femoral head.

14. The pelvic implant assembly of claim 1, further comprising a pubic implant coupling the acetabular component to an opposing pubic bone.

15. The pelvic implant assembly of claim 14, wherein the pubic implant comprises a clamping device for clamping a portion of the pubic bone.

16. The pelvic implant assembly of claim 15, wherein the clamping device comprises a worm-and-ratchet mechanism.

17. A method for attaching an implant to a pelvis, the method comprising:

attaching a compliant fixator to the pelvis; and

coupling an acetabular component to the compliant fixator.

18. The method of claim 17, further comprising:

coupling a pubic implant to the acetabular component.

19. The method of claim 18, further comprising:

clamping the pubic implant onto a portion of an opposite pubic bone.

20. The method of claim 17, further comprising:

coupling a femoral component to the acetabular component.

21. A pelvic implant assembly comprising:

an acetabular cup;

a prosthetic femoral head coupled to the acetabular cup;

a prosthetic femoral stem coupled to the femoral head; and

a compliant fixator coupling the acetabular cup to the pelvis.

22. The pelvic implant assembly of claim 21, further comprising an acetabular liner articulating with the femoral head.

23. The pelvic implant assembly of claim 21, further comprising a pubic implant coupling the acetabular cup to an opposing pubic bone.

24. The pelvic implant assembly of claim 23, wherein the pubic implant comprises a clamping device for clamping a portion of the pubic bone.

25. The pelvic implant assembly of claim 21, further comprising a connector coupling the acetabular cup to the compliant fixator.

26. The pelvic implant assembly of claim 21, further comprising a biasing mechanism for biasing a compliant body of the compliant fixator.