METHOD AND SYSTEM FOR CREATING PATIENT-SPECIFIC INSTRUMENTATION FOR CHONDRAL GRAFT TRANSFER

• US 20130191085A1
• Filed: 01/24/2013
• Published: 07/25/2013
• Est. Priority Date: 01/24/2012
• Status: Active Grant

• Current Assignee: Zimmer Incorporated (Zimmer Biomet Holdings, Inc.)
• Original Assignee: Zimmer Incorporated (Zimmer Biomet Holdings, Inc.)
• Inventors: Li, Jia, Hatfield, David
• Granted Patent: US 10,325,065 B2
• Time in Patent Office: Days
• US Class Current: 703/1
• CPC Class Codes: A61B 17/1604 Chisels; Rongeurs; Punches; Stamps
• CPC Class Codes: A61B 17/1635 for grafts, harvesting or transplants
• CPC Class Codes: A61B 17/32053 Punch like cutting instruments, e.g. using a cylindrical or oval knife A61B17/326 takes precedence; trepans A61B17/1695; for use on the cornea A61F9/007
• CPC Class Codes: A61B 2017/00969 used for transplantation
• CPC Class Codes: A61B 2017/320052 Guides for cutting instruments by marking A61B2090/395
• CPC Class Codes: A61B 2017/320064 with tissue or sample retaining means
• 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: F04C 2270/041 Controlled or regulated
• CPC Class Codes: G16H 50/50 for simulation or modelling of medical disorders

Abstract

A system for creating a patient-specific instrument model for chondral graft plugging comprises a bone model generator for producing a bone/cartilage model of an articular region of a bone from images thereof. A defect geometry identifier identifies a graft geometry from a defect region of said bone/cartilage model. A donor locator locates an autograft at a donor site or identifies an allograft from a database, using said bone/cartilage model and the graft geometry. A patient-specific instrument model generator creates a model of a graft-plugging patient-specific instrument from said bone/cartilage model, and the graft geometry, the graft-plugging patient-specific instrument model comprising a bone/cartilage interface surface shaped as a function of the bone/cartilage model for the at least one graft-plugging patient-specific instrument to be selectively positioned on the bone/cartilage to pose the autograft or the allograft at the defect region.

Claims

1. A method for creating at least one patient-specific instrument model for chondral graft removal, comprising:

determining a graft geometry from a defect region in a bone/cartilage model of an articular region of a bone;

identifying at least one donor location from the bone/cartilage model, using the graft geometry; and

creating a model of at least one graft-removal patient-specific instrument using the at least one donor location, the graft geometry, and the bone/cartilage model, the graft-removal patient-specific instrument model comprising a bone/cartilage interface surface shaped as a function of the bone/cartilage model for the at least one graft-removal patient-specific instrument to be selectively positioned on the bone/cartilage to remove cartilage from the at least one donor location.

2. The method according to claim 1, wherein creating the model of the at least one graft-removal patient-specific instrument comprises creating the bone/cartilage interface surface for contacting the bone, and a tooling end positioned relative to the bone/cartilage interface surface for removing cartilage at the donor location.

3. The method according to claim 2, wherein creating the model of the at least one graft-removal patient-specific instrument comprises creating a joint between the bone/cartilage interface surface and the tool for guiding the tool toward the donor location.

4. The method according to claim 1, further comprising creating a model of a graft-plugging patient-specific instrument adapted to plug the defect region with at least one graft, using the bone/cartilage model of the articular region of the bone and the graft geometry, the graft-plugging patient-specific instrument model comprising a bone/cartilage interface surface shaped as a function of the bone/cartilage model for the at least one graft-plugging patient-specific instrument to be selectively positioned on the bone/cartilage to pose a graft at the defect region.

5. The method according to claim 4, wherein creating the model of the at least one graft-plugging patient-specific instrument comprises creating the bone/cartilage interface surface for contacting the bone, and a tooling end positioned relative to the bone/cartilage interface surface for posing the graft at the defect region.

6. The method according to claim 5, wherein creating the model of the at least one graft-plugging patient-specific instrument comprises creating a joint between the bone/cartilage interface surface and the tool for guiding the tool in posing the graft at the defect region.

7. The method according to claim 1, further comprising creating the bone/cartilage model from imaging of the bone and cartilage.

8. The method according to claim 1, wherein the method is performed pre-operatively.

9. A system for creating a patient-specific instrument model for chondral graft plugging, comprising:

a bone model generator for producing a bone/cartilage model of an articular region of a bone from images thereof;

a defect geometry identifier for identifying a graft geometry from a defect region of said bone/cartilage model;

a donor locator for locating an autograft at at least one donor site or identifying an allograft from a database, using said bone/cartilage model and the graft geometry; and

a patient-specific instrument model generator for creating a model of a graft-plugging patient-specific instrument from said bone/cartilage model, and the graft geometry, the graft-plugging patient-specific instrument model comprising a bone/cartilage interface surface shaped as a function of the bone/cartilage model for the at least one graft-plugging patient-specific instrument to be selectively positioned on the bone/cartilage to pose at least one of the autograft and the allograft at the defect region.

10. The system according to claim 9, wherein the patient-specific instrument model generator creates the bone/cartilage interface surface of the graft-plugging patient-specific instrument model for contacting the bone/cartilage, and a tooling end positioned relative to the bone/cartilage interface surface for posing the graft at the defect region.

11. The system according to claim 10, wherein the patient-specific instrument model generator creates a joint in graft-plugging patient-specific instrument model the between the bone/cartilage interface surface and the tool for guiding the tool in posing the graft at the defect region

12. The system according to claim 9, wherein the patient-specific instrument model generator creates a model of a graft-removal patient-specific instrument from said bone/cartilage model, the donor site and the graft geometry, the graft-removal patient-specific instrument model comprising a bone/cartilage interface surface shaped as a function of the bone/cartilage model for the at least one graft-removal patient-specific instrument to be selectively positioned on the bone/cartilage to remove the autograft from the at least one donor location.

13. The system according to claim 12, wherein the patient-specific instrument model generator creates the bone/cartilage interface surface of the graft-removal patient-specific instrument model for contacting the bone/cartilage, and a tooling end positioned relative to the bone/cartilage interface surface for removing the autograft at the donor location.

14. The system according to claim 13, wherein the patient-specific instrument model generator creates a joint in graft-removal patient-specific instrument model between the bone/cartilage interface surface and the tool for guiding the tool toward the donor location.

15. A method for creating at least one patient-specific instrument model for chondral graft plugging, comprising:

determining a graft geometry from a defect region in a bone/cartilage model of an articular region of a bone;

identifying at least one of a corresponding allograft and autograft with a donor location from the bone/cartilage model, using the graft geometry; and

creating a model of at least one graft-plugging patient-specific instrument using the graft geometry, and the bone/cartilage model, the at least one graft-plugging patient-specific instrument adapted to plug at least one of an autograft and an allograft at the defect region.

16. The method according to claim 15, wherein the graft-plugging patient-specific instrument model comprising a bone/cartilage interface surface shaped as a function of the bone/cartilage model for the at least one graft-plugging patient-specific instrument to be selectively positioned on the bone/cartilage to pose at least one of the autograft and allograft at the defect region.

17. The method according to claim 16, wherein creating the model of the at least one graft-plugging patient-specific instrument comprises creating the bone/cartilage interface surface for contacting the bone, and a tooling end positioned relative to the bone/cartilage interface surface for posing at least one of the autograft and allograft at the defect region.

18. The method according to claim 17, wherein creating the model of the at least one graft-plugging patient-specific instrument comprises creating a joint between the bone/cartilage interface surface and the tool for guiding the tool in posing the graft at the defect region.

19. The method according to claim 15, further comprising creating the bone/cartilage model from imaging of the bone and cartilage.

20. The method according to claim 15, wherein the method is performed pre-operatively.