Femoral Component For Bone Conservation

Abstract

A femoral prosthetic component includes a patellar guide portion, a pair of condyles projecting from the guide portion and forming an intercondylar notch therebetween, a bearing surface, and an interface surface configured to face a resected surface of a femur. The interface surface comprises an anterior face and a posterior face, and is substantially contoured between the anterior and posterior face to match a contoured surface of the femur. The substantially contoured interface surface may include at least one planar surface portion to about a flat cut portion in the surface of the femur. This planar surface portion may be a distal flat at a distal face of the interface surface. The contoured interface surface may alternatively include a plurality of planar surface portions. The femoral prosthetic component is configured such that preparation of the bone to match the interface surface results in minimal resection of the distal femur.

1 - 3 . (canceled) 
     
     
         4 . A femoral prosthetic component, comprising:
 a patellar guide portion;   a pair of condyles projecting from the patellar guide portion and forming an intercondylar notch therebetween;   a bearing surface; and   an interface surface configured to face a resected surface of a femur;   wherein the interface surface comprises a planar anterior face and a planar posterior face; and   wherein the entirety of the interface surface between the anterior face and posterior face is fully contoured such that no portion of the interface surface between the anterior face and the posterior face is planar so that the interface surface between the anterior face and posterior face matches a contoured surface of the femur.   
     
     
         5 . The femoral prosthetic component of  claim 4 , wherein the femoral prosthetic component is configured such that preparation of the femur to match the interface surface results in minimal resection of a distal portion of the femur. 
     
     
         6 . The femoral prosthetic component of  claim 4 , further comprising an elongated projection extending from a distal face portion of the interface surface, configured to engage with a hole prepared in the femur. 
     
     
         7 . A femoral prosthetic component, comprising:
 a bearing surface; and   an interface surface configured to face a resected surface of a femur;   wherein the interface surface comprises an anterior face and a posterior face; and   wherein the entirety of the interface surface between the anterior face and posterior face is fully contoured such that no portion of the interface surface between the anterior face and the posterior face is planar so that the interface surface between the anterior face and posterior face matches a contoured surface of the femur.   
     
     
         8 . A method for implanting a prosthetic implant, comprising:
 selecting a prosthetic component, wherein the prosthetic component comprises a prosthetic body portion, the prosthetic body portion having a bearing surface and an interface surface configured to face a resected surface of a bone prepared to receive the prosthetic component   removing, using a first cutting tool, a first portion of the bone to form a portion of the resected surface of the bone configured to match a counterpart portion of the interface surface of the prosthetic component;   wherein the interface surface of the prosthetic component comprises a planar anterior face and a planar posterior face, and wherein the entirety of the interface surface between the anterior face and posterior face is fully contoured so that no portion of the interface surface between the anterior face and the posterior face is planar so that the interface surface between the anterior face and posterior face is configured to match the resected surface of the bone that is substantially contoured.   
     
     
         9 . The method of  claim 8 , wherein the first cutting tool is a rotary cutting tool. 
     
     
         10 . The method of  claim 8 , further comprising removing, using one of the first cutting tool or a second cutting tool, a second portion of the bone to form a second resected surface of the bone. 
     
     
         11 . The method of  claim 10 , comprising using the second cutting tool comprising a planar cutting blade, and wherein the second resected surface of the bone includes one or both of the planar anterior face and planar posterior face. 
     
     
         12 . The method of  claim 8 , wherein removing the first portion of the bone is performed using the first cutting tool guided by a robotic surgery system, wherein the robotic surgery system comprises:
 a surgical device configured to hold the first cutting tool and be manipulated by a user to perform the removal of bone;   a feedback mechanism configured to supply feedback to the user manipulating surgical device based on a relationship between the bone and the surgical device; and   a computing system programmed to associate a virtual object with the bone, and wherein the computing system is further programmed to control the feedback mechanism to provide guidance to the user while the user manipulates the surgical device.