Methods and tools for femoral intermedullary revision surgery

• US 6,740,092 B2
• Filed: 01/11/2001
• Issued: 05/25/2004
• Est. Priority Date: 03/28/1998
• Status: Expired due to Term

• Current Assignee: Howmedica Osteonics Corp. (Stryker Corporation)
• Original Assignee: Howmedica Osteonics Corp. (Stryker Corporation)
• Inventors: Lombardo, Alan, Krackow, Kenneth, Bono, James V., Axelson, Stuart L. Jr.
• Primary Examiner(s): Milano, Michael J.
• Assistant Examiner(s): ROBERTS, PAUL A
• Application Number:
  US09/758,608
• Publication Number:
  US 20010001121A1
• Time in Patent Office: 1,230 Days
• Field of Search: 606/86-88, 606/102, 623/20.14, 623/20.15
• US Class Current: 606/88
• 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 17/164 intramedullary
• CPC Class Codes: A61B 17/1668 for the upper femur A61B17/164 takes precedence
• CPC Class Codes: A61B 17/921 for intramedullary devices
• CPC Class Codes: A61B 2017/00477 Coupling A61B2017/0046 takes precedence
• CPC Class Codes: A61B 2017/922 Devices for impaction, impact element
• CPC Class Codes: A61B 2090/036 abutting on tissue or skin
• CPC Class Codes: A61B 2090/062 penetration depth

Abstract

IM revision tools include reamers with depth markings or stops, an impactor-extractor with a coupling for attaching to tools which are inserted into and removed from the IM canal, a resection guide tower to which a cutting block is attached and which includes a notch which serves as both a witness mark and a holder for a femoral collar, a reversible clean-up cutting block with a quick-connect clamp attachable to the guide tower for resecting the distal femur, a selection of spacer blocks for measuring the space between the femur to determine the size of the components to be installed, a multiple cut cutting guide for preparing the femur, a set of 5 and 10 mm trial wedges, a trial stem valgus adapter, femoral sizing indicators which include indications of anterior/posterior offset, a stabilizer box cutting template which is attachable to the multiple cut cutting guide, and anterior/posterior offset adapters for attaching the femoral component to the IM stem.

Claims

1. A method of resecting the distal femur and proximal tibia prior to implanting a prosthetic component, said method comprising the steps of:

(a) securing a block having a plurality of guiding surfaces to the distal femur; and

(b) resecting the distal femur with said block;

(c) resecting the anterior cortex of the femur using an anterior cutting guide surface on the block;

(d) resecting the posterior condyles using a posterior cutting guide surface on the block;

(e) chamfering the anterior distal femur using an anterior chamfer cutting guide surface on the block;

(f) chamfering the posterior distal femur using a posterior chamfer cutting guide surface on the block;

(g) attaching a posterior stabilizer box cutting guide to the block; and

(h) resecting a posterior stabilizer box cavity.

2. A method according to claim 1 wherein said step of securing further comprises the steps of attaching a valgus adapter to the block and affixing the valgus adapter to the IM canal of the femur.

3. A method according to claim 1 wherein said step of securing further comprises the step of attaching an anterior referencing plate to the block.

4. A method according to claim 1 wherein said step of securing further comprises the step of inserting a pair of pins through holes in the block.

5. A method according to claim 2 wherein said step of attaching a valgus adapter further comprises the step of attaching with a spring biased screw.

6. A method according to claim 1 further comprising the step of rotationally aligning the block with medial and lateral handles prior to resecting the femur.

7. A method according to claim 1 further comprising the step of reaming the femoral IM canal prior to securing the block.

8. A method according to claim 1 further comprising the step of making a clean up cut resection of the distal femur prior to securing the block.

9. The method as set forth in claim 1 further including the step of cutting a cavity for an offset adapter by attaching a cutting guide for the offset adapter to the block.

10. A method of resecting the distal femur and proximal tibia prior to implanting a prosthetic component, said method comprising the steps of:

(a) placing a guide in the medullary canal;

(b) measuring the space between the distal femur and the proximal tibia;

(c) measuring the size of the distal femur;

(d) mounting a cutting block on said distal femur using said guide as a reference;

(e) resecting the anterior cortex of the femur using an anterior cutting guide surface on the block;

(f) resecting the posterior condyles using a posterior cutting guide surface on the block;

(g) chamfering the anterior distal femur using an anterior chamfer cutting guide surface on the block;

(h) chamfering the posterior distal femur using a posterior chamfer cutting guide surface on the block;

(i) attaching a posterior stabilizer box cutting guide to the block; and

(j) resecting a posterior stabilizer box cavity.

11. The method according to claim 10 further comprising the steps of attaching a valgus adapter to the block and affixing the valgus adapter to the IM canal of the femur.

12. A method according to claim 10 further comprising the step of attaching an anterior referencing plate to the block.

13. A method according to claim 10 further comprising the step of inserting a pair of pins through holes in the block.

14. A method according to claim 11 wherein said step of attaching a valgus adapter further comprises the step of attaching with a spring biased screw.

15. A method according to claim 10 further comprising the step of rotationally aligning the block with medial and lateral handles prior to resecting the femur.

16. A method according to claim 10 further comprising the step of reaming the femoral IM canal prior to securing the block.

17. A method according to claim 10 further comprising the step of making a clean up cut resection of the distal femur prior to securing the block.

18. The method as set forth in claim 10 further including the step of cutting a cavity for an offset adapter by attaching a cutting guide to the block.

19. A method of resecting the distal femur and proximal tibia prior to implanting a prosthetic component, said method comprising the steps of:

(a) securing a block having a plurality of guiding surfaces to the distal femur;

(b) resecting the distal femur with said block;

(c) resecting the anterior cortex of the femur using an anterior cutting guide surface on the block;

(d) resecting the posterior condyles using a posterior cutting guide surface on the block;

(e) chamfering the anterior distal femur using an anterior chamfer cutting guide surface on the block;

(f) chamfering the posterior distal femur using a posterior chamfer cutting guide surface on the block; and

(g) cutting a cavity for an offset adapter by attaching an offset adapter cutting guide to the block and using said offset cutting guide to form a cavity for the offset adapter.

20. The method as set forth in claim 19 further including the steps of:

(h) attached a posterior stabilizer box cutting guide to the block; and

(i) resecting a posterior stabilizer box cavity.