Nested cutting block

• US 6,007,537 A
• Filed: 06/15/1998
• Issued: 12/28/1999
• Est. Priority Date: 06/15/1998
• Status: Expired due to Term

• Current Assignee: Zimmer Incorporated (Zimmer Biomet Holdings, Inc.)
• Original Assignee: Sulzer Orthopedics Inc. (Centerpulse Orthopedics Incorporated)
• Inventors: Burkinshaw, Brian D., Mumme, Charles W.
• Primary Examiner(s): Buiz, Michael
• Assistant Examiner(s): Bui, Vy Q.
• Application Number:
  US09/097,501
• Time in Patent Office: 561 Days
• Field of Search: 606/86, 606/87, 606/88, 606/89, 606/96, 606/98, 606/82
• US Class Current: 606/66
• CPC Class Codes: A61B 17/155 Cutting femur

Abstract

A nested cutting block includes at least a first slot for guiding a saw blade during a first bone cutting operation. The first block has a cavity formed therein. A first securing interlock is formed on the first block. A second block is detachably mounted in the cavity and includes at least a second slot for guiding the saw blade during a second bone cutting operation. A second securing interlock is attached to the second block. An interlock member engages the first and second securing interlocks for detachably engaging the second block within the first block. The first bone cutting operation is made with the first and second blocks interconnected and mounted in a cutting position. The second bone cutting operation may be made with the first and second blocks nested together in the cutting position. Alternatively, the second bone cutting operation may also be made with the first block detached from the second block and the second block remaining in the cutting position.

Claims

1. A nested cutting block comprising:

a first block including at least one first slot for guiding a saw blade during a first bone cutting operation, and having a cavity formed therein;

a second block detachably mounted in the cavity and including at least one second slot for guiding the saw blade during a second bone cutting operation; and

an interlocking member for detachably securing the second block within the first block.

2. The nested block as defined in claim 1 further comprising a first securing interlock on the first block.

3. The nested block as defined in claim 2 wherein the first securing interlock includes a locking recess formed in the first block.

4. The nested block as defined in claim 2 further comprising a second securing interlock on the second block.

5. The nested block as defined in claim 4 wherein the second securing interlock includes an attachment member extending from the second block.

6. The nested block as defined in claim 5 wherein the interlocking member includes a handle for receiving the attachment member and for nested engagement with the first block.

7. The nested block as defined in claim 6 wherein the at least one first slot is disposed at a first angle for the femoral cutting operation.

8. The speed block as defined in claim 7 wherein the at least one second slot is disposed at a second angle, different from the first angle, for the chamfer cutting operation.

9. The speed block as defined in claim 1 further comprising an anterior referencing member extending from the first block.

10. A nested cutting block comprising:

a first block including a first pair of slots for guiding a saw blade during a first bone cutting operation, and having a cavity formed therein;

a first securing interlock on the first block;

a second block detachably mounted in the cavity and including a pair of second slots for guiding the saw blade during a second bone cutting operation;

a second securing Interlock on the second block; and

an interlock member engaging the first and second securing interlocks for detachably engaging the second block within the first block, wherein the first and second bone cutting operations are femoral and chamfer cutting operations and include an anterior cutting operation and a posterior cutting operation.

11. The nested cutting block as defined in claim 10 wherein the first securing interlock includes a locking recess formed in the first block, the second securing interlock includes an attachment member extending from the second block, and the interlock member includes a handle for receiving the attachment member and for nested engagement with the locking recess.

12. The nested cutting block as defined in claim 11 further comprising means for securing the second block to a bone during the first and second bone cutting operations.

13. The nested cutting block as defined in claim 11 wherein the first and second bone cutting operations are femoral and chamfer cutting operations.

14. The nested block as defined in claim 13 wherein the femoral and chamfer cutting operations include an anterior cutting operation and a posterior cutting operation.

15. The nested cutting block as defined in claim 11 wherein the first slots are disposed at a first angle for the first bone cutting operation.

16. The nested cutting block as defined in claim 15 wherein the second slots are disposed at a second angle, different from the first angle, for the second bone cutting operation.

17. The nested cutting block as defined in claim 11 further comprising an anterior referencing member extending from the first block.

18. A nested cutting block comprising:

a first block including at least one first slot for guiding a saw blade during a first cutting operation;

a second block detachably connected to the first block, the second block including at least one second slot for guiding the saw blade during a second cutting operation;

means on the first block for receiving the second block; and

means for detachably Interconnecting the first and second blocks, whereby the first cutting operation is made with the first and second blocks being interconnected and mounted in a cutting position, and the second cutting operation is made with the first block detached from the second block and the second block remaining in the cutting position, wherein the first and second bone cutting operations are femoral and chamfer cutting operations and include an anterior cutting operation and a posterior cutting operation.

19. A nested chamfer speed block comprising:

a first block having a cavity formed therein;

a first securing interlock on the first block;

a second block detachably mounted in the cavity of the first block;

a second securing interlock on the second block;

a first and a second pair of slots for guiding a saw blade during a femoral and chamfer cutting operation, respectively;

the first block and the first pair of slots being optionally removable from the second block after the femoral cutting operation is completed, to permit improved visual contact of the second pair of slots and the second block during the chamfer cutting operation; and

an interlock member engaging the first and second securing interlocks for detachably engaging the second block with the first block, wherein the first and second bone cutting operations are femoral and chamfer cutting operations and include an anterior cutting operation and a posterior cutting operation.

20. A nested cutting block comprising:

a first block having a cavity formed therein and including at least one cutting guide for guiding a saw blade during a first bone cutting operation;

a second block detachably mounted in the cavity of the first block and including at least one cutting guide for guiding a saw blade during a second bone cutting operation, and a securing member for fixedly securing the second block to a bone during the first and second cutting operations;

an interlocking member for detachably securing the first block to the second block so that the first block may be either secured to or detached from the second block during the second cutting operation, wherein the first and second bone cutting operations are femoral and chamfer cutting operations and include an anterior cutting operation and a posterior cutting operation.