Abstract
Introduction: Conventional total hip replacement has a high rate of failure in young or high demand patients due to polyethylene wear, therefore, we perform a metal on metal hip resurfacing in these patients. Materials and Methods: The cup is all chrome cobalt alloy, with HA coating and the beads of the porous ingrowth surface are integrated with the substrate metal. The metal head is þxed with low viscosity cement, after careful precise preparation of femoral head.33 hybrid hip resurfacing in 29 patients. Average age was 42.8 years. Results: Harris Hip Score: 34.2 points average preoperatively and 97.1 points at the last examination. The average follow-up was 14.7 month. Discussion: The advantages: Minimal bone resection which makes for easier future revision, normal proximal femoral loading that hence avoidance of the stress shielding present in standard hip replacements, less risk of dislocation with greater range of motion, the physiological biomechanics of the joint is maintained, proprioception is maintained and we have noted that the postoperative recovery is extremely smooth and quick.
The disadvantages: Leg length and neck version cannot be altered. Hip resurfacing is, technically, a demanding procedure.
Contraindications: osteoporosis, varus neck.
Conclusions: Our early results are encouraging. We believe that metal on metal hybrid resurfacing is a legitimate alternative for active patients who require hip arthroplasty.
Theses abstracts were prepared by Professor Dr. Frantz Langlais. Correspondence should be addressed to him at EFORT Central Office, Freihofstrasse 22, CH-8700 Küsnacht, Switzerland.
