Alternative TKR bearing surfaces: the femur? You have got to be kidding.
D019645:Arthroplasty, Replacement, Knee / Q000295:instrumentation*; D002858:Chromium Alloys; D019544:Equipment Failure Analysis; D006801:Humans; D007720:Knee Prosthesis; D020959:Polyethylene / Q000737:chemistry; D011474:Prosthesis Design; D011475:Prosthesis Failure; D013499:Surface Properties; D015040:Zirconium / Q000737:chemistry
D002858:Chromium Alloys; D020959:Polyethylene; D015040:Zirconium