Abstract
Aims Lateral ligament complex injuries are a common cause of chronic ankle instability. It has been found that functional and mechanical instability of the ankle joint can respond to arthroscopic debridement of the ankle alone and that not all structurally unstable joints require stabilisation. The aim of this study was to find out the role of examination under anaesthesia (EUA) and arthroscopy in the management of these problems.
Method We retrospectively studied 43 patients with chronic lateral ankle instability who had failed to respond to a functional rehabilitation programme. All patients underwent an EUA with stress views to determine instability, proceeded by arthroscopic examination of the ankle.
Results Intra-articular bony lesion was seen in 41.8% of cases. Fibrosis in the anterolateral gutter was found in 79.1%, 27.9% had osteochondral defect, 30.2% had osteophytes causing impingement and 9.3% had loose bodies. Structural instability was confirmed in 53.4% and functional instability in 46.6%. Arthroscopy demonstrated attenuation of the anterior talofibular ligament in 14%. Following arthroscopic debridement lateral reconstruction was required in only 14 (32.5%). Twenty-three patients (53.4%) went on to improve after arthroscopy alone and did not need lateral reconstruction. Three patients (6.9%) needed supplementary procedures for other associated problems.
Conclusion Arthroscopic assessment and treatment of intraarticular lesion in patients with chronic ankle instability can result in a stable ankle that does not necessitate a lateral ligament complex reconstruction.
Correspondence should be addressed to BOFSS, c/o Wrightington Wigan and Leigh NHS Trust, Hall Lane, Appley Bridge, Wigan, Lancashire WN7 9EP.
