Femoral Tibial Customized Patient-Specific Orthopaedic Surgical Instrumentation

• US 20090131942A1
• Filed: 09/29/2008
• Published: 05/21/2009
• Est. Priority Date: 09/30/2007
• Status: Active Grant

• Current Assignee: DePuy Synthes Products LLC (Johnson & Johnson)
• Original Assignee: DePuy Synthes Products LLC (Johnson & Johnson)
• Inventors: Sheeks-Hoffman, Janell, Guzman, Jose F., Lester, Mark B., Aker, Chris
• Granted Patent: US 8,398,645 B2
• Time in Patent Office: Days
• US Class Current: 606/88
• CPC Class Codes: A61B 17/155 Cutting femur
• CPC Class Codes: A61B 17/157 Cutting tibia
• CPC Class Codes: A61B 17/1764 for the knee
• CPC Class Codes: A61B 2017/00526 Methods of manufacturing
• CPC Class Codes: A61B 2017/568 produced with shape and dimensions specific for an individual patient
• CPC Class Codes: A61B 2034/108 Computer aided selection or customisation of medical implants or cutting guides
• CPC Class Codes: Y10T 409/30084 with regulation of operation by templet, card, or other replaceable information supply

Abstract

A number of orthopaedic surgical instruments are also disclosed. A method, apparatus, and system for fabricating such instruments are also disclosed.

Claims

1. An orthopaedic instrument assembly, comprising:

a femoral cutting block having (i) a negative contour surface that is configured to receive a portion of a distal femur of a patient, (ii) a cutting guide, and (iii) a pair of trial condylar surfaces formed in the distal end of the femoral cutting block, and

a tibial cutting block having (i) a negative contour surface that is configured to receive a portion of a proximal tibia of the patient, (ii) a cutting guide, and (iii) a pair of trial articular surfaces formed in the proximal end of the tibial cutting block, the pair of trial articular surfaces being configured to receive the pair of trial condylar surfaces formed in the distal end of the femoral cutting block.

2. The orthopaedic instrument assembly of claim 1, wherein:

the negative contour surface of the femoral cutting block comprises a customized patient-specific negative contour surface that is configured to receive a portion of a distal femur of a patient that has a corresponding contour, and

the negative contour surface of the tibial cutting block comprises a customized patient-specific negative contour surface that is configured to receive a portion of a proximal tibia of a patient that has a corresponding contour.

3. The orthopaedic instrument assembly of claim 1, wherein the pair of trial condylar surfaces formed in the distal end of the femoral cutting block comprises:

a medial condylar surface having a concave outer profile which resembles a natural medial condyle of a femur, and

a lateral condylar surface having a concave outer profile which resembles a natural lateral condyle of the femur.

4. The orthopaedic instrument assembly of claim 1, wherein the pair of trial articular surfaces formed in the proximal end of the tibial cutting block comprises:

a medial articular surface having a convex outer profile which resembles a natural articular surface of a medial condyle of a tibia, and

a lateral articular surface having a convex outer profile which resembles a natural articular surface of a lateral condyle of a tibia.

5. The orthopaedic instrument assembly of claim 1, wherein both the femoral cutting block and the tibial cutting block have a number of guide pin holes defined therein.

6. The orthopaedic instrument assembly of claim 1, wherein the cutting guide of the femoral cutting block is substantially parallel to the cutting guide of the tibial cutting block.

7. A customized patient-specific orthopaedic instrument, comprising:

a customized patient-specific cutting block having a body comprising (i) a femoral-facing surface having a customized patient-specific negative contour configured to receive a portion of a femur of a patient that has a corresponding contour, (ii) a tibial-facing surface having a customized patient-specific negative contour configured to receive a portion of a tibia of the patient that has a corresponding contour, (iii) an outer surface opposite the femoral-facing surface and the tibial-facing surface, and (iv) at least one cutting guide.

8. The customized patient-specific orthopaedic instrument of claim 7, wherein the body of the customized patient-specific cutting block further comprises a tibial guide pin hole extending through the body from the outer surface to the tibial-facing surface.

9. The customized patient-specific orthopaedic instrument of claim 8, wherein the body of the customized patient-specific cutting block further comprises a femoral guide pin hole extending through the body from the outer surface to the femoral-facing surface.

10. The customized patient-specific orthopaedic instrument of claim 7, wherein the body of the customized patient-specific cutting block further comprises a femoral guide pin hole extending through the body from the outer surface to the femoral-facing surface.

11. The customized patient-specific orthopaedic instrument of claim 7, wherein the at least one cutting guide includes a tibial cutting guide extending through the body from the outer surface to the tibial-facing surface.

12. The customized patient-specific orthopaedic instrument of claim 11, wherein the at least one cutting guide further includes a femoral cutting guide extending through the body from the outer surface to the femoral-facing surface.

13. The customized patient-specific orthopaedic instrument of claim 7, wherein the at least one cutting guide includes a femoral cutting guide extending through the body from the outer surface to the femoral-facing surface.

14. The customized patient-specific orthopaedic instrument of claim 7, wherein the body of the customized patient-specific cutting block further comprises an elongated tongue positioned between the femoral-facing surface and the tibial-facing surface and extending in a general direction away from the outer surface.

15. The customized patient-specific orthopaedic instrument of claim 7, wherein the body of the customized patient-specific cutting block defines a monolithic body.

16. A method of performing an orthopaedic surgical procedure on a knee of a patient, comprising:

securing a customized patient-specific cutting block to the knee of the patient such that (i) a portion of a femur of the patient is received into a femoral-facing surface having a customized patient-specific negative contour, and (ii) a portion of a tibia of the patient is received into a tibial-facing surface having a customized patient-specific negative contour, and

making a cut in at least one of the tibia of the patient and the femur of the patient with the customized patient-specific cutting block.

17. The method of claim 16, further comprising inserting a guide pin through a tibial guide pin hole and into the tibia of the patient.

18. The method of claim 17, further comprising inserting a guide pin through a femoral guide pin hole and into the femur of the patient.

19. The method of claim 16, further comprising inserting a guide pin through a femoral guide pin hole and into the femur of the patient.

20. The method of claim 16, wherein making the cut in at least one of the tibia of the patient and the femur of the patient comprises making a cut in the tibia of the patient with the customized patient-specific cutting block.

21. The method of claim 20, wherein making the cut in at least one of the tibia of the patient and the femur of the patient further comprises making a cut in the femur of the patient with the customized patient-specific cutting block.

22. The method of claim 16, wherein making the cut in at least one of the tibia of the patient and the femur of the patient comprises making a cut in the femur of the patient with the customized patient-specific cutting block.