Revision total knee arthroplasty using large distal femoral augments for severe metaphyseal bone deficiency: a preliminary study.

Abstract

Managing severe structural femoral metaphyseal bone loss in revision total knee arthroplasty is a challenging problem facing the revision knee surgeon. This study assesses the use of large (30 mm) metal distal femoral augments to compensate for severe bone deficiencies. Hospital for Special Surgery scores, Knee Society scores, and range of motion improved after implantation of femoral components with 30-mm distal femoral augments. There was no radiographic evidence of loosening, and no implants had been revised at mean 37-month follow-up. This appears to be an acceptable technique based on the intermediate-term results.