Patient-matched instruments

Patent metadata

Field	Value
Publication number	US-9386994-B2
Application number	US-201113157991-A
Country	US
Kind code	B2
Filing date	Jun 10, 2011
Priority date	Jun 11, 2010
Publication date	Jul 12, 2016
Grant date	Jul 12, 2016

Abstract

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

First claim

We claim:

1. A patient-matched surgical instrument matched to the anatomy of a particular patient, comprising:
(a) an anatomy-facing side;
(b) wherein the anatomy-facing side includes a plurality of discrete, physically separate anatomy-contacting portions shaped such that engagement with the anatomy of the particular patient orients the instrument in a predetermined orientation;
(c) wherein the anatomy-facing side includes a plurality of discrete, physically separate recessed portions, wherein the plurality of recessed portions are recessed relative to parts of the anatomy-contacting portions proximate the plurality of recessed portions;
(d) wherein the plurality of anatomy-contacting portions are at least one of:
(i) non-uniform in distribution;
(ii) non-uniform in shape; or
(iii) non-uniform in surface area; and

(e) wherein the anatomy-facing side of the patient-matched surgical instrument includes areas of relatively greater contour and areas of relatively lower contour, wherein a concentration of the plurality of anatomy-contacting portions is lower in the areas of relatively greater contour than in the areas of relatively lower contour;
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 anatomy-contacting portions comprise at least one anatomy-contacting portion proximate the patella-femoral groove portion, at least one anatomy-contacting portion proximate the intercondylar notch portion, at least one anatomy-contacting portion proximate the medial condyle portion, and at least one anatomy-contacting portion proximate the lateral condyle portion.

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

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

4. The patient-matched surgical instrument of claim 1 , wherein a total area of the anatomy-contacting portions proximate the patella-femoral groove portion and the intercondylar notch portion is greater than a total area of the anatomy-contacting portions proximate the medial condyle portion and the lateral condyle portion.

5. The patient-matched surgical instrument of claim 1 , wherein a total area of the anatomy-contacting portions proximate the patella-femoral groove portion and the intercondylar notch portion is less than a total area of the anatomy-contacting portions proximate the medial condyle portion and the lateral condyle portion.

6. The patient-matched surgical instrument of claim 1 , wherein a density of anatomy-contacting portions proximate the patella-femoral groove portion and the intercondylar notch portion is greater than a density of anatomy-contacting portions proximate the medial condyle portion and the lateral condyle portion.

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

8. The patient-matched surgical instrument of claim 7 , wherein the plurality of anatomy-contacting portions further comprise at least one anatomy-contacting portion defining a substantially linear contact.

9. The patient-matched surgical instrument of claim 7 , wherein the plurality of anatomy-contacting portions further comprise at least one anatomy-contacting portion defining a substantially point contact.

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

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

12. The patient-matched surgical instrument of claim 11 , wherein the guide is a through slot including at least one planar surface.

13. A patient-matched surgical instrument matched to the anatomy of a particular patient, comprising:
(a) an anatomy-facing side;
(b) wherein the anatomy-facing side includes a plurality of discrete, physically separate anatomy-contacting portions shaped such that engagement with the anatomy of the particular patient orients the instrument in a predetermined orientation;
(c) wherein the anatomy-facing side includes a plurality of discrete, physically separate recessed portions, wherein the plurality of recessed portions are recessed relative to parts of the anatomy-contacting portions proximate the plurality of recessed portions;
(d) wherein the plurality of anatomy-contacting portions define a first total area of the anatomy-facing side and wherein the plurality of recessed portions define a second total area of the anatomy-facing side, wherein the second total area is greater than the first total area; and
(e) wherein the anatomy-facing side of the patient-matched surgical instrument includes areas of relatively greater contour and areas of relatively lower contour, wherein a concentration of the plurality of anatomy-contacting portions is lower in the areas of relatively greater contour than in the areas of relatively lower contour;
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 anatomy-contacting portions comprise at least one anatomy-contacting portion proximate the patella-femoral groove portion, at least one anatomy-contacting portion proximate the intercondylar notch portion, at least one anatomy-contacting portion proximate the medial condyle portion, and at least one anatomy-contacting portion proximate the lateral condyle portion.

14. The patient-matched surgical instrument of claim 13 , wherein a total area of the anatomy-contacting portions proximate the patella-femoral groove portion and the intercondylar notch portion is greater than a total area of the anatomy-contacting portions proximate the medial condyle portion and the lateral condyle portion.

15. A patient-matched surgical instrument matched to the anatomy of a particular patient, comprising:
(a) an anatomy-facing side;
(b) wherein the anatomy-facing side includes a plurality of discrete, physically separate anatomy-contacting portions shaped such that engagement with the anatomy of the particular patient orients the instrument in a predetermined orientation;
(c) wherein the anatomy-facing side includes a plurality of discrete, physically separate recessed portions, wherein the plurality of recessed portions are recessed relative to parts of the anatomy-contacting portions proximate the plurality of recessed portions; and
(d) wherein the anatomy-facing side of the patient-matched surgical instrument includes areas of relatively greater contour and areas of relatively lower contour, wherein a concentration of the plurality of anatomy-contacting portions is lower in the areas of relatively greater contour than in the areas of relatively lower contour;
wherein the patient-matched surgical instrument is a femoral cutting guide;
wherein the anatomy-facing side includes a patella-femoral

Assignees

• Agnihotri Aashiish
• Conway Patrick Brian
• Evans David L
• Gibson Luke Andrew
• Griffin Jennifer Allyn
• Hughes Michael Dean
• Mehl David Timothy
• Salehi Abraham Biglari
• Sharp Jeffrey Andrew
• Tarsha Maroun Hanna
• Wald Andrew Justin
• Wolfe Thomas S
• Smith & Nephew Inc

Inventors

• Agnihotri Aashiish
• Conway Patrick Brian
• Evans David L
• Gibson Luke Andrew
• Griffin Jennifer Allyn
• Hughes Michael Dean
• Mehl David Timothy
• Salehi Abraham Biglari
• Sharp Jeffrey Andrew
• Tarsha Maroun Hanna
• Wald Andrew Justin
• Wolfe Thomas S

Classifications

• A61B2034/108

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

• A61B2017/568

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

• A61B17/157

  Cutting tibia · CPC title

• A61B34/10

  Computer-aided planning, simulation or modelling of surgical operations · CPC title

• A61B17/155 Primary

  Cutting femur · CPC title