Patient-matched instruments

Patent metadata

Field	Value
Publication number	US-9795393-B2
Application number	US-201615175464-A
Country	US
Kind code	B2
Filing date	Jun 7, 2016
Priority date	Aug 23, 2010
Publication date	Oct 24, 2017
Grant date	Oct 24, 2017

Abstract

Patient-matched surgical instruments and associated methods having an anatomy facing side including several discrete, physically separate anatomy contacting portions configured to match the anatomy of a particular patient and including one or more of non-uniform in distribution, non-uniform in shape and non-uniform in surface area.

First claim

We claim:

1. A patient-matched surgical instrument matched to the anatomy of a particular patient, comprising:
an anatomy facing side defining a plurality of discrete anatomy contacting portions configured to match the anatomy of the particular patient and being at least one of non-uniform in distribution, non-uniform in shape, and non-uniform in surface area, the anatomy facing side further defining a plurality of discrete recessed portions that are recessed relative to parts of the plurality of discrete anatomy contacting portions; and
wherein the plurality of discrete recessed portions are physically separated from one another by the plurality of discrete anatomy contacting portions.

2. The patient-matched surgical instrument of claim 1 , further comprising a pliant material located in at least one of the plurality of discrete recessed portions.

3. The patient-matched surgical instrument of claim 1 , wherein the plurality of discrete anatomy contacting portions defines a first total area of the anatomy facing side, and wherein the plurality of discrete recessed portions defines a second total area of the anatomy facing side that is greater than the first total area.

4. The patient-matched surgical instrument of claim 1 , wherein the patient-matched surgical instrument is a femoral cutting guide; and
wherein the anatomy facing side includes a patella-femoral groove portion, an intercondylar notch portion, a medial condyle portion, and a lateral condyle portion; and
wherein the plurality of discrete anatomy contacting portions comprises at least one discrete anatomy contacting portion proximate the patella-femoral groove portion, at least one discrete anatomy contacting portion proximate the intercondylar notch portion, at least one discrete anatomy contacting portion proximate the medial condyle portion, and at least one discrete anatomy contacting portion proximate the lateral condyle portion.

5. The patient-matched surgical instrument of claim 4 , wherein a total area of the discrete anatomy contacting portions proximate the patella-femoral groove portion and the intercondylar notch portion is greater than a total area of the discrete anatomy contacting portions proximate the medial condyle portion and the lateral condyle portion.

6. The patient-matched surgical instrument of claim 4 , wherein a total area of the discrete anatomy contacting portions proximate the patella-femoral groove portion and the intercondylar notch portion is less than a total area of the discrete anatomy contacting portions proximate the medial condyle portion and the lateral condyle portion.

7. The patient-matched surgical instrument of claim 4 , wherein a density of the discrete anatomy contacting portions proximate the patella-femoral groove portion and the intercondylar notch portion is greater than a density of the discrete anatomy contacting portions proximate the medial condyle portion and the lateral condyle portion.

8. The patient-matched surgical instrument of claim 1 , wherein the plurality of discrete anatomy contacting portions comprises at least one discrete anatomy contacting portion defining an area contact.

9. The patient-matched surgical instrument of claim 8 , wherein the plurality of discrete anatomy contacting portions further comprise at least one discrete anatomy contacting portion defining a substantially linear contact.

10. The patient-matched surgical instrument of claim 8 , wherein the plurality of discrete anatomy contacting portions further comprises at least one discrete anatomy contacting portion defining a substantially point contact.

11. The patient-matched surgical instrument of claim 1 , wherein the anatomy facing side of the patient-matched surgical instrument includes areas of relatively greater contour and areas of relatively lower contour, and wherein a contact area of the plurality of discrete anatomy contacting portions is lower in the areas of relatively greater contour than in the areas of relatively lower contour.

12. The patient-matched surgical instrument of claim 1 , wherein the anatomy facing side of the patient-matched surgical instrument includes areas of relatively greater contour and areas of relatively lower contour, and wherein a concentration of the plurality of discrete anatomy contacting portions is lower in the areas of relatively greater contour than in the areas of relatively lower contour.

13. The patient-matched surgical instrument of claim 1 , wherein at least one of the plurality of discrete anatomy contacting portions extends along a periphery of the anatomy facing side.

14. The patient-matched surgical instrument of claim 1 , wherein the patient-matched surgical instrument is a tibial cutting guide comprising a medial paddle including at least one of the discrete anatomy contacting portions and a lateral paddle including at least one of the discrete anatomy contacting portions.

15. The patient-matched surgical instrument of claim 1 , further comprising a guide extending through the patient-matched surgical instrument.

16. The patient-matched surgical instrument of claim 15 , wherein the guide comprises a through slot including at least one planar surface.

17. The patient-matched surgical instrument of claim 1 , wherein the plurality of discrete recessed portions are positioned proximate to the parts of the plurality of discrete anatomy contacting portions.

18. A patient-matched surgical instrument matched to the anatomy of a particular patient, comprising:
an anatomy facing side defining a plurality of discrete anatomy contacting portions configured to match the anatomy of the particular patient, the anatomy facing side further defining a plurality of discrete recessed portions that are recessed relative to parts of the plurality of discrete anatomy contacting portions, wherein the plurality of discrete anatomy contacting portions define a first total area of the anatomy facing side, and wherein the plurality of discrete recessed portions defines a second total area of the anatomy facing side that is greater than the first total area; and
wherein the anatomy facing side further defines a set of boundaries separating the plurality of discrete recessed portions from one another, and wherein the set of boundaries is at least partially defined by the plurality of discrete anatomy contacting portions.

19. The patient-matched surgical instrument of claim 18 , wherein the patient-matched surgical instrument is a femoral cutting guide, wherein the anatomy facing side includes a patella-femoral groove portion, an intercondylar notch portion, a medial condyle portion, and a lateral condyle portion; and
wherein the plurality of discrete anatomy contacting portions comprises at least one discrete anatomy contacting portion proximate the patella-femoral groove portion, at least one discrete anatomy contacting portion proximate the intercondylar notch portion, at least one discrete anatomy contacting portion proximate the medial condyle portion, and at least one discrete anatomy contacting portion proximate the lateral condyle portion.

20. The patient-matched surgical instrument of claim 19 , wherein a total area of the discrete anatomy contacting portions proximate the patella-femoral groove portion and the intercondylar notch portion is greater than a total area of the discrete anatomy contacting portions proximate the medial condyle portion and the lateral condyle portion.

21. The patient-matched surgical instrument of claim 18 , wherein the anatomy facing side of the patien

Assignees

• Smith & Nephew Inc

Inventors

• Hughes Michael Dean
• Salehi Abraham Biglari
• Agnihotri Aashiish
• Gibson Luke Andrew
• Evans David L
• Sharp Jeffrey A
• Wolfe Thomas S

Classifications

• A61B17/155 Primary

  Cutting femur · CPC title

• A61B2017/568

  produced with shape and dimensions specific for an individual patient · CPC title

• A61B2034/108

  Computer aided selection or customisation of medical implants or cutting guides · CPC title

• A61B17/157

  Cutting tibia · CPC title

• A61B17/1764

  for the knee · CPC title