Hip replacement systems and methods

Abstract

Disclosed are systems, methods, devices and surgical techniques for joint arthroplasty, including implant components that facilitate the position and implantation of a hip replacement using cutting guides and various femoral implant arrangements.

1 . A femoral prosthesis for implantation into a resected proximal end of a femur, the prosthesis comprising:
 a stem having a proximal end and a distal end,   a collar portion for placement in a location adjacent the proximal end of the stem to engage at least a portion of the resected proximal end of the femur, wherein the collar portion comprises an interior surface sized and configured to be at least partially in intimate contact with an unresected outer surface of the femur when the stem is implanted into the femur;   the stem further including an alignment indicator that aligns with at least a portion of a hole formed into a cortical wall of the femur when the stem is implanted into the femur.   
     
     
         2 . The femoral prosthesis of  claim 1 , wherein the alignment indicator comprises a generally cylindrical bar which extends outwardly from the stem. 
     
     
         3 . The femoral prosthesis of  claim 1 , wherein the alignment indicator comprises a generally cylindrical bar which extends laterally outward from opposing sides of the stem, wherein a first portion of the alignment indicator aligns with a first portion of the hole and a second portion of the alignment indicator aligns with a second portion of the hole. 
     
     
         4 . The femoral prosthesis of  claim 1 , wherein the alignment indicator comprises a bar which extends laterally outward from at least one side of the stem. 
     
     
         5 . The femoral prosthesis of  claim 1 , wherein the alignment indicator comprises a bar which extends completely through the stem. 
     
     
         6 . The femoral prosthesis of  claim 1 , wherein the alignment indicator is integrally attached to the stem. 
     
     
         7 . The femoral prosthesis of  claim 1 , wherein the alignment indicator is modularly attached to the stem. 
     
     
         8 . The femoral prosthesis of  claim 1 , wherein the alignment indicator includes a non-circular cross-section. 
     
     
         9 . The femoral prosthesis of  claim 1 , wherein the alignment indicator is removeable from the stem. 
     
     
         10 . A femoral prosthesis for implantation into a resected proximal end of a femur, the prosthesis comprising:
 an elongated stem having at least one opening formed therein, the opening extending generally transverse to a longitudinal axis of the elongated stem,   a first bar secured within the at least one opening, the first bar including a first portion that extends outwardly from the elongated stem, the first portion including an outer surface that engages with at least a portion of the resected proximal end of the femur when the stem is implanted into the femur,   wherein at least a portion of the first portion is pre-operatively shaped to substantially match one or more anatomical features of the patient.   
     
     
         11 . The femoral prosthesis of  claim 10 , wherein the first portion includes an outer surface that keys into the engaged portion of the resected proximal end of the femur. 
     
     
         12 . The femoral prosthesis of  claim 10 , wherein the at least one opening extends completely through the elongated stem. 
     
     
         13 . The femoral prosthesis of  claim 12 , wherein the first portion extends outwardly from a first side of the opening, and the first bar further includes a second portion extending outwardly from an opposing side of the opening. 
     
     
         14 . The femoral prosthesis of  claim 12 , wherein the first bar is integrally attached to the stem. 
     
     
         15 . The femoral prosthesis of  claim 12 , wherein the first bar is modularly attached to the stem. 
     
     
         16 . The femoral prosthesis of  claim 12 , wherein the first bar includes a non-circular cross-section. 
     
     
         17 . The femoral prosthesis of  claim 12 , wherein the first bar includes a circular cross-section. 
     
     
         18 . The femoral prosthesis of  claim 12 , wherein the first bar is removeable from the stem. 
     
     
         19 . The femoral prosthesis of  claim 12 , wherein the stem further comprises a collar portion for placement in a location adjacent the proximal end of the stem to engage at least a portion of the resected proximal end of the femur, wherein the collar portion comprises an interior surface sized and configured to be at least partially in intimate contact with an unresected outer surface of the femur when the stem is implanted into the femur. 
     
     
         20 . The femoral prosthesis of  claim 19 , wherein the collar portion includes a non-circular opening for accommodating the stem.