An oxidized Zr ceramic surfaced femoral component for total knee arthroplasty.
A ceramic surfaced oxidized Zr femoral component was used in total knee replacedent. Prior mechanical testing had shown a decrease in adhesive and abrasive wear using this material as compared with CoCrMo suggesting its use in younger patients in whom long-term PE wear is a consideration. The alloy had no demonstrable Ni impurities and was applicable to patients with Ni or Co allergies. In a randomized prospective study comparing femoral components of the same design but fabricated either of cast CoCrMo or oxidized Zr, there was a more rapid return of flexion and regaining functional milestones in the oxidized Zr group. No adverse effects had been observed at the 2-year evaluation.
Laskin
Richard S
RS
Institute for Hip and Knee Replacement, Hospital for Special Surgery, New York, NY 10021, USA. laskinr@aol.com
D019645:Arthroplasty, Replacement, Knee / Q000295:instrumentation*; D002516:Ceramics; D002858:Chromium Alloys / Q000627:therapeutic use; D003035:Cobalt / Q000627:therapeutic use; D005269:Femur; D006801:Humans; D007720:Knee Prosthesis; D008982:Molybdenum / Q000627:therapeutic use; D011446:Prospective Studies; D011474:Prosthesis Design; D011475:Prosthesis Failure; D016059:Range of Motion, Articular; D013499:Surface Properties; D016896:Treatment Outcome; D015040:Zirconium / Q000627:therapeutic use*
D002858:Chromium Alloys; D003035:Cobalt; D008982:Molybdenum; D015040:Zirconium