Arthroscopic Notchplasty in the Treatment of Flexion Contracuture of Early Osteoarthritic Knee ( a preliminary study ) / 대한정형외과학회잡지

ABSTRACT

Although causes of restriction of knee extension in osteoarthritis are thought to be contractures involving the posterior capsule and the hamstring muscles, intercondylar notch stenosis, osteophyte, loose body, and displacement of ruptured meniscus, few studies have investigated incidence and treatment. The purpose of this study is to consider intercondylar notch stenosis and anterior impingement as major causes of flexion contracture in osteoarthritic knee and to assess their relationship through arthroscopic notchplasty. We performed arthroscopic notchplasty and debridement in sixty patients (sixty-eight cases) with more than Sflexion contracture for early osteoarthritic knee and compared flexion contracture before and after operation. The average flexion contracture was 13degrees (5degrees-35degrees) before operation and 4degrees (0degrees- 25degrees) immediately after. An average of 9degrees improvement was shown, with 29 cases ( 48% ) showing improvement of over 5degrees. Our study indicates that flexion contracture in the 29 cases (48%) improved by arthroscopic notchplasty was caused by intercondylar notch stenosis and anterior impingement. Arthroscopic notchplasty may beneficially affect those with flexion contracture in early osteoarthritic knee when conservative management of this disease has failed. This is a preliminary study on the immediate postoperative outcome, therefore, long-term follow-up and recurrence rate should be investigated in future studies.