US 12,167,860 B2
Devices and methods for posterior resection in robotically assisted partial knee arthroplasties
Emily Gogarty, Montreal (CA); Jean-Sebastien Merette, Mont-St-Hiliare (CA); Benoit Pelletier, Laval (CA); Suntara Ly, Longgueuil (CA); and Emmanuelle Bouvier, Val-David (CA)
Assigned to Orthosoft ULC, Montreal (CA)
Filed by Orthosoft ULC, Montreal (CA)
Filed on Apr. 14, 2021, as Appl. No. 17/230,203.
Claims priority of provisional application 63/010,761, filed on Apr. 16, 2020.
Prior Publication US 2021/0322032 A1, Oct. 21, 2021
Int. Cl. A61B 17/15 (2006.01); A61B 17/17 (2006.01); A61B 34/20 (2016.01); A61B 34/30 (2016.01); A61B 90/00 (2016.01); A61B 90/50 (2016.01); A61B 17/16 (2006.01); A61B 17/56 (2006.01)
CPC A61B 17/1764 (2013.01) [A61B 17/1721 (2013.01); A61B 34/20 (2016.02); A61B 34/30 (2016.02); A61B 90/37 (2016.02); A61B 90/50 (2016.02); A61B 17/1675 (2013.01); A61B 2017/564 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A system for performing femoral resections for a partial knee arthroplasty, the system comprising:
a surgical robot comprising an articulating arm configured to move within a coordinate system for the surgical robot;
a femoral resection guide instrument comprising:
a coupler for connecting to the articulating arm;
an extension arm extending from the coupler; and
a resection block attached to the extension arm the resection block including a guide surface for performing a resection of a distal surface of a single condyle of a distal femur; and
a finishing guide separate from and releasably couplable to the femoral resection guide instrument for performing a posterior resection of the single condyle of the distal femur, wherein the finishing guide can be intraoperatively attached to and separated from the femoral resection guide instrument by a user;
wherein the finishing guide is positionable by the surgical robot to determine a thickness and rotation of the posterior resection;
wherein the finishing guide comprises a resection block body comprising:
a first surface for facing bone;
a second surface opposite the first surface;
a first resection surface configured to perform a posterior femoral resection when the first surface is positioned to engage flush with the resected distal surface; and
a second resection surface configured to perform a chamfer resection when the first surface is positioned to engage flush with the resected distal surface:
wherein the first resection surface and the second resection surface extend from the first surface to the second surface through the resection block body; and
wherein the first resection surface and the second resection surface are located a fixed distance from each other.