IP Library › Granted Patent US 9,795,393

Granted Patent B2

US 9,795,393 · App. 15/175,464 · Granted Oct 24, 2017

Patient-matched instruments

Inventors: Michael Dean Hughes (Cordova, TN); Abraham Biglari Salehi (Bartlett, TN); Aashiish Agnihotri (Memphis, TN); Luke Andrew Gibson (Southaven, MS); David L. Evans (Bartlett, TN); Jeffrey A. Sharp (Salt Lake City, UT); Thomas S. Wolfe (Collierville, TN)

Assignee: Smith & Nephew, Inc.

A61B17/155 A61B17/157 A61B17/1764 A61B17/1767 A61B2017/00526 A61B2017/568 A61B2034/108 A61F2/38 A61F2002/30952

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Quick Facts

Patent No.: US 9,795,393
App. No.: 15/175,464
Granted: Oct 24, 2017
Kind: B2

External Links

USPTO Patent Center↗ Full Patent PDF↗

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.

Claims (40)

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

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 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.

22. The patient-matched surgical instrument of claim 18 , 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.

23. The patient-matched surgical instrument of claim 18 , wherein the plurality of discrete recessed portions are positioned proximate to the parts of the plurality of discrete anatomy contacting portions.

24. The patient-matched surgical instrument of claim 18 , wherein the plurality of discrete anatomy contacting portions are physically separated from one another, and wherein the plurality of discrete recessed portions are physically separated from one another.

25. The patient-matched surgical instrument of claim 18 , wherein the plurality of discrete recessed portions extends between the plurality of discrete anatomy contacting portions.

26. A patient-matched surgical instrument matched to the anatomy of a particular patient, comprising:

wherein the plurality of discrete anatomy contacting portions are at least one of non-uniform in distribution, non-uniform in shape, and non-uniform in surface area;

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 define a second total area of the anatomy facing side that is greater than the first total area; and

wherein parts of the plurality of discrete anatomy contacting portions define borders separating the plurality of discrete recessed portions from one another.

27. The patient-matched surgical instrument of claim 26 , wherein the plurality of discrete recessed portions are positioned proximate to parts of the plurality of discrete anatomy contacting portions.

28. The patient-matched surgical instrument of claim 26 , wherein the plurality of discrete anatomy contacting portions are physically separated from one another, and wherein the plurality of discrete recessed portions are physically separated from one another.

29. The patient-matched surgical instrument of claim 26 , wherein the plurality of discrete recessed portions extends between the plurality of discrete anatomy contacting portions.

Continuity (4)

Continuation 13817160

Provisional Application 61393643 · Oct 15, 2010

Provisional Application 61402095 · Aug 23, 2010

Related Publication 20160287268A1 · Oct 6, 2016