One-stage total knee arthroplasty for knee osteoarthritis combined with ipsilateral femoral extra-articular deformity:individual design / 中国组织工程研究

ABSTRACT

BACKGROUND:Total knee arthroplasty for knee osteoarthritis accompanied with extra-articular deformity is stil chal enging. An individual replacement plan should be designed to obtain good mechanical axis and to recover suitable soft-tissue balance. OBJECTIVE:To observe the safety and feasibility of individual y designed one-stage total knee arthroplasty for knee osteoarthritis combined with ipsilateral femoral extra-articular deformity. METHODS:A total of eight patients with knee osteoarthritis combined with ipsilateral femoral extra-articular deformity were enrol ed in this study. According to preoperative plan, five patients underwent intra-articular compensatory osteotomy, and the remaining three received extra-articular corrective osteotomy. Multi-planar deformities as wel as soft-tissue conditions were recorded. Main outcome measures included the hospital for special surgery score, Western Ontario and McMaster Universities Arthritis Index score and alignments deviation. RESULTS AND CONCLUSION:The patients were averagely fol owed up for 29 months. The hospital for special surgery score changed from preoperative 32.5 points to postoperative 87.5 points. The Western Ontario and McMaster Universities Arthritis Index score was increased from preoperative 37.1 points to postoperative 88.8 points (P<0.05). Mean mechanical axis deviation (either varus or valgus) changed from preoperative 17.1° to postoperative 1.4° (P<0.05). Al cases with extra-articular corrective osteotomy healed within 3 months, and none had postoperative infection, loosening or venous thromboembolic events. One patient was with 5° residual knee anti-sheets. Results verified that one-stage total knee arthroplasty procedures are effective in the treatment of knee osteoarthritis accompanied with ipsilateral femoral extra-articular deformity in accordance with individual preoperative plan.