Customized Patient-Specific Bone Cutting Blocks

• US 20090099567A1
• Filed: 09/29/2008
• Published: 04/16/2009
• Est. Priority Date: 09/30/2007
• Status: Active Grant

• Current Assignee: Depuy Products Incorporated (Johnson & Johnson)
• Original Assignee: Depuy Products Incorporated (Johnson & Johnson)
• Inventors: Zajac, Eric
• Granted Patent: US 8,323,288 B2
• Time in Patent Office: Days
• US Class Current: 606/79
• 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. A customized patient-specific orthopaedic instrument, comprising:

a customized patient-specific cutting block having;

an anterior body piece comprising (i) a bone-facing surface having a customized patient-specific negative contour configured to receive a portion of an anterior side of a bone of a patient that has a corresponding contour, (ii) an outer surface opposite the bone-facing surface, and (iii) a cutting guide,

an end body piece that is separate from the anterior body piece, the end body piece comprising (i) a bone-facing surface having a customized patient-specific negative contour configured to receive a portion of the bone of the patient that has a corresponding contour, and (ii) an outer surface opposite the bone-facing surface, and

a number of fasteners securing the anterior body piece and the end body piece to one another.

2. The orthopaedic instrument of claim 1, wherein:

the anterior body piece of the customized patient-specific cutting block further comprises a pair of guide pin holes defined therein, and

the pair of guide pin holes extend from the outer surface to the bone-facing surface.

3. The orthopaedic instrument of claim 2, wherein:

the end body piece of the customized patient-specific cutting block further comprises a pair of guide pin holes defined therein, and

the pair of guide pin holes of the end body piece extend from the outer surface to the bone-facing surface.

4. The orthopaedic instrument of claim 1, wherein:

the end body piece of the customized patient-specific cutting block further comprises a pair of guide pin holes defined therein, and

the pair of guide pin holes of the end body piece extend from the outer surface to the bone-facing surface.

5. The orthopaedic instrument of claim 1, wherein the customized patient-specific cutting block comprises a customized patient-specific femoral cutting block.

6. The orthopaedic instrument of claim 1, wherein the customized patient-specific cutting block comprises a customized patient-specific tibial cutting block.

7. The orthopaedic instrument of claim 1, wherein the cutting guide of the anterior body piece comprises a captured cutting guide.

8. The orthopaedic instrument of claim 1, wherein the number of fasteners comprises a number of pins, wherein:

the anterior body piece has a number of holes defined therein,

the end body piece has a number of holes defined therein, and

the number of pins are positioned in the number of holes defined in the anterior body piece and the number of holes defined in the end body piece so as to secure the anterior body piece and the end body piece to one another.

9. A method of performing an orthopaedic surgical procedure on a bone of a patient, comprising:

inserting an anterior body piece of a customized patient-specific cutting block through an incision,

inserting an end body piece of the customized patient-specific cutting block through the incision, the end body piece being separate from the anterior body piece,

securing the anterior body piece and the end body piece to one another subsequent to the insertion of both pieces to create an assembled customized patient-specific cutting block,

positioning the assembled customized patient-specific cutting block in contact with the bone of the patient, and

making a cut in the bone of the patient with the assembled customized patient-specific cutting block.

10. The method of claim 9, further comprising inserting a pair of guide pins into a pair of guide pin holes defined in the assembled customized patient-specific cutting block prior to making the cut in the bone of the patient.

11. The method of claim 9, wherein the securing step comprises securing the anterior body piece and the end body piece to one another with a number of pins.

12. The method of claim 9, wherein:

positioning the assembled customized patient-specific cutting block in contact with the bone of the patient comprises positioning the assembled customized patient-specific cutting block in contact with a femur of the patient, and

making the cut in the bone of the patient with the assembled customized patient-specific cutting block comprises making a cut in the femur of the patient with the assembled customized patient-specific cutting block.

13. The method of claim 9, wherein:

positioning the assembled customized patient-specific cutting block in contact with the bone of the patient comprises positioning the assembled customized patient-specific cutting block in contact with a tibia of the patient, and

making the cut in the bone of the patient with the assembled customized patient-specific cutting block comprises making the cut in the tibia of the patient with the assembled customized patient-specific cutting block.

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

a customized patient-specific cutting block having a body that comprises (i) a bone-facing surface having a customized patient-specific negative contour configured to receive a portion of an anterior side of a bone of a patient that has a corresponding contour, (ii) an outer surface opposite the bone-facing surface, and (iii) a non-captured cutting guide.

15. The orthopaedic instrument of claim 14, wherein:

the body of the customized patient-specific cutting block further comprises a pair of guide pin holes defined therein, and

the pair of guide pin holes extend from the outer surface to the bone-facing surface.

16. The orthopaedic instrument of claim 14, wherein the customized patient-specific cutting block comprises a customized patient-specific femoral cutting block.

17. The orthopaedic instrument of claim 14, wherein the customized patient-specific cutting block comprises a customized patient-specific tibial cutting block.

18. The orthopaedic instrument of claim 14, wherein the non-captured cutting guide is defined by a sidewall extending from the outer surface to the bone-facing surface.