Tool

• US 20070162039A1
• Filed: 12/12/2006
• Published: 07/12/2007
• Est. Priority Date: 12/16/2005
• Status: Abandoned Application

• Current Assignee: Finsbury (Development) Limited (WPP PLC)
• Original Assignee: Finsbury (Development) Limited (WPP PLC)
• Inventors: Wozencroft, Robert
• Application Number:
  US11/609,713
• Publication Number:
  US 20070162039A1
• Time in Patent Office: Days
• US Class Current: 606/89
• CPC Class Codes: A61B 17/15 Guides therefor arrangements for guiding straight saw blades in general B23D51/025
• CPC Class Codes: A61B 17/175 for preparing the femur for hip prosthesis insertion
• CPC Class Codes: A61B 2090/034 abutting on parts of the device itself

Abstract

An alignment guide includes locator arm having a proximal end connected to a support member and a distal end having location means for location on a high point of the femoral head. The locator arm also has a notch guard which in use will extend around at least a part of the femoral neck.

Claims

1. An alignment guide for use in femoral head surgery comprising:

a support member;

a cannulated rod supported by, and adjustable with respect to the support member; and

a locator arm having a proximal end connected to the support member and a distal end having location means for location on a high point of the femoral head and a notch guard which in use will extend around at least a part of the femoral neck.

2. An alignment guide according to claim 1 wherein the location means is of an annular configuration.

3. An alignment guide according to claim 1 wherein the notch guard is a ring extending from the location means and generally angled thereto.

4. An alignment guide according to claim 3 wherein the ring is a C-ring.

5. An alignment guide according to claim 1 wherein the alignment guide includes a support arm extending from the support member and connected thereto.

6. An alignment guide according to claim 5 wherein the support arm includes contact means.

7. An alignment guide according to claim 5 wherein at least one of the locator arm and the support arm is moveable from a first open position to a second clamping position.

8. An alignment guide according to claim 7 wherein means for causing the movement is included.

9. An alignment guide according to claim 1 wherein the locator means includes two indicator fingers.

10. An alignment guide according to claim 1 wherein the locator means is demountable.

11. An alignment guide according to claim 1 wherein the locator means includes a cutting guide.

12. An alignment guide according to claim 1 additionally including a goniometer.

13. An alignment guide according to claim 1 additionally including anteversion indicating means.

14. An alignment guide according to claim 13 wherein the anteversion indicating means is plugged onto the notch guard.

15. An alignment guide according to claim 13 wherein the anteversion indicating means is a Y shaped fork.

16. An alignment guide according to claim 13 wherein the anteversion indicating means includes a biting element.

17. An alignment guide according to claim 16 wherein the biting element is a block having a concave face having teeth extending therefrom.

18. A kit comprising at least one alignment guide according to claim 1, a goniometer and an anteversion alignment guide.

19. A kit according to claim 18 wherein the kit includes a plurality of locator means representing various sizes of resurfacing heads.

21. A method of preparing the head of a femur for femoral head resurfacing wherein the method comprises:

exposing the head of a femur;

locating the alignment guide according to claim 1 on the head of the femur; and

machining the head of the femur.

20. An alignment guide for use in femoral head surgery comprising:

a support member;

a cannulated rod supported by, and adjustable with respect to the support machine;

a locator arm having a proximal end connected to the support member and a distal end having annular location means for location on a high point of the femoral head and a c-ringnotch guide which in use will extend around at least a part of the femoral neck; and

a support arm including contact means.

22. A method according to claim 20 wherein the method comprises:

exposing the head of the femur;

locating the alignment guide according to the above first aspect on the head of the femur;

inserting a drill and drilling a well into the head of the femur;

removing the drill;

removing the alignment guide;

removing the top of the head of the femur;

inserting a guide rod into the well;

locating a sleeve cutter on the guide rod and cutting the head; and

optionally chamfer cutting the head.