Tangential fit of patient-specific guides

• US 9,826,981 B2
• Filed: 03/10/2014
• Issued: 11/28/2017
• Est. Priority Date: 03/13/2013
• Status: Active Grant

• Current Assignee: Biomet Manufacturing, LLC (Zimmer Biomet Holdings, Inc.)
• Original Assignee: Biomet Manufacturing, LLC (Zimmer Biomet Holdings, Inc.)
• Inventors: Schoenefeld, Ryan J., Hershberger, Troy W., Mauch, Thomas J.
• Primary Examiner(s): Boles, Sameh
• Application Number:
  US14/202,861
• Publication Number:
  US 20140276854A1
• Time in Patent Office: 1,359 Days
• Field of Search: None
• CPC Class Codes: A61B 17/155 Cutting femur
• CPC Class Codes: A61B 17/157 Cutting tibia
• CPC Class Codes: A61B 17/1746 for the acetabulum
• CPC Class Codes: A61B 17/1764 for the knee
• 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

Abstract

A bone preparation guide including a first patient-specific portion based on image data of a specific patient'"'"'s bone and configured to match the patient'"'"'s specific bone surface. A second patient-specific portion is based on image data of the specific patient'"'"'s bone and configured to match the patient'"'"'s specific bone surface. A patient-generic portion is configured to be a bone-facing portion supported by the first and the second patient-specific bone contacting members at a portion of the patient'"'"'s bone surface not imaged during preparation of a preoperative plan.

Claims

1. A bone preparation guide comprising:

a first patient-specific portion based on image data of a specific patient'"'"'s bone and configured to match the patient'"'"'s specific bone surface;

a second patient-specific portion based on image data of the specific patient'"'"'s bone and configured to match the patient'"'"'s specific bone surface; and

a patient-generic portion configured to be a bone-facing portion supported by the first patient-specific portion and the second patient-specific portion at a portion of the patient'"'"'s bone surface not imaged during preparation of a preoperative plan;

wherein the first patient-specific portion and the second patient-specific portion both include bone contacting members including pointed tips.

2. The bone preparation guide of claim 1, wherein the patient-generic portion includes a compliant portion.

3. The bone preparation guide of claim 1, wherein the patient-generic portion is flexible, and both the first patient-specific portion and the second patient-specific portion are rigid.

4. The bone preparation guide of claim 1, wherein the patient-generic portion includes a plurality of movable members configured to conform to the patient'"'"'s bone shape.

5. The bone preparation guide of claim 1, wherein the bone preparation guide defines a guide aperture.

6. The bone preparation guide of claim 1, wherein the guide includes a plurality of patient-specific guide rods configured to rest against an outer surface of the patient'"'"'s specific bone.

7. The bone preparation guide of claim 1, wherein the first patient-specific portion is customized based on first two-dimensional image data of a specific patient and to correspond to the patient'"'"'s own specific bone geometry, and the second patient-specific portion is customized based on second two-dimensional image data of the specific patient to correspond to the patient'"'"'s own specific bone geometry, the first two-dimensional image data is different than the second two-dimensional image data.

8. The bone preparation guide of claim 7, wherein the first patient-specific portion and the second patient-specific portion are customized based on a three-dimensional model of the specific patient'"'"'s bone, the three-dimensional model based solely on two-dimensional x-ray images of the specific patient'"'"'s bone.

9. The bone preparation guide of claim 1, wherein the first patient-specific portion and the second patient-specific portion are customized based on historical data from other patients, the historical data including age and physical dimensions.

10. The bone preparation guide of claim 1, wherein the guide defines a cutting slot.

11. The bone preparation guide of claim 1, wherein the guide is entirely compliant.

12. The bone preparation guide of claim 1, wherein the bone preparation guide is one of a tibia guide, femoral guide, or acetabular guide.

13. A bone preparation guide comprising:

a plurality of first patient-specific bone contacting members customized based on two-dimensional image data of a specific patient to match the patient'"'"'s specific bone geometry and provide a first bone coupling surface;

a plurality of second patient-specific bone contacting members customized based on two-dimensional image data of the specific patient to match the patient'"'"'s specific bone geometry and provide a second bone coupling surface; and

a patient-generic portion configured as a bone-facing surface to be supported by the plurality of first patient-specific bone contacting members and the plurality of second patient-specific bone contacting members at a portion of the patient'"'"'s bone surface not imaged during preparation of a preoperative plan;

wherein the plurality of first patient-specific bone contacting members and the plurality of second patient-specific bone contacting members both include pointed tips.

14. The bone preparation guide of claim 13, wherein the plurality of first patient-specific bone contacting members and the plurality of second patient-specific bone contacting members are customized based directly on two-dimensional x-ray data from only two x-ray images taken along intersecting planes.

15. The bone preparation guide of claim 13, wherein the plurality of first patient-specific bone contacting members and the plurality of second patient-specific bone contacting members are customized based on a three-dimensional bone model, which is based on two-dimensional x-ray data.

16. The bone preparation guide of claim 15, wherein the guide includes a compliant material, and the patient-generic portion is between the plurality of first patient-specific bone contacting members and the plurality of second patient-specific bone contacting members.

17. The bone preparation guide of claim 15, wherein the plurality of first patient-specific bone contacting members and the plurality of second patient-specific bone contacting members are rigid, and the patient-generic portion is flexible.

18. The bone preparation guide of claim 13, further comprising a plurality of patient-specific guide rods configured to rest against an outer surface of the patient'"'"'s specific bone.

19. A bone preparation guide comprising:

a first patient-specific portion based on image data of a specific patient'"'"'s bone and configured to match the patient'"'"'s specific bone surface;

a second patient-specific portion based on image data of the specific patient'"'"'s bone and configured to match the patient'"'"'s specific bone surface;

a patient-generic portion configured to be a bone-facing portion supported by the first patient-specific portion and the second patient-specific portion at a portion of the patient'"'"'s bone surface not imaged during preparation of a preoperative plan; and

a plurality of patient-specific guide rods configured to rest against an outer surface of the patient'"'"'s specific bone.

20. A bone preparation guide comprising:

a first patient-specific portion based on image data of a specific patient'"'"'s bone and configured to match the patient'"'"'s specific bone surface;

a second patient-specific portion based on image data of the specific patient'"'"'s bone and configured to match the patient'"'"'s specific bone surface; and

a patient-generic portion configured to be a bone-facing portion supported by the first patient-specific portion and the second patient-specific portion at a portion of the patient'"'"'s bone surface not imaged during preparation of a preoperative plan;

wherein the patient-generic portion is flexible, and both the first patient-specific portion and the second patient-specific portion are rigid.