Treatment of anterolateral impingements of the ankle joint by arthroscopy.

Impingement syndromes of the ankle joint are among the most common intraarticular ankle lesions. Soft tissue impingement lesions of the ankle usually occur as a result of synovial, or capsular irritation secondary to traumatic injuries, usually ankle sprains, leading to chronic ankle pain. The aim of this prospective study was to evaluate arthroscopic debridement of an anterolateral soft tissue impingement of the ankle. During the period between October 2000 and February 2004, 23 patients with residual complaints after an ankle sprain were diagnosed as anterolateral impingement of the ankle, and were treated by arthroscopic debridement. At a minimum of 6 months follow up, patients were asked to complete an American orthopaedic foot and ankle society (AOFAS) ankle and hind foot score. The average follow-up was 25 months (range 12-38). The average pre-operative patient assessed AOFAS score was 34 (range 4-57). At the end of follow-up the mean AOFAS score was 89 (range 60-100). In terms of patient satisfaction 22 patients said they would accept the same arthroscopic procedure again for the same complaints. At the end of follow-up, 7 patients had excellent results, and 14 patients had good results while two patients had fair results. We believe that arthroscopic debridement of the anterolateral impingement soft tissues are a good, and effective method of treatment.