Subtalar arthroscopy: indications, technique, and results.

Abstract

The purpose of this study was to present the indications, technique, and results for subtalar arthroscopy in 50 consecutive patients. In each case, ankle arthroscopy was performed concomitantly to assess the exact source of the patient's pain. Surgical indications included chronic pain, swelling, buckling, and/or locking that failed conservative treatment. Arthroscopy of the ankle and subtalar joints were performed using both 2.7- and 1.9-mm arthroscopes through standard and accessory portals; distraction was used in all cases. All patients were followed-up for an average of 48 months (range, 36 to 70 months). Group 1 included 21 patients (42%) with chronic lateral ankle pain following an inversion injury. In this group, the subtalar joints were completely normal and the pathology was found to be limited only to the ankle joint. In group 2, 29 patients (58%) had the following diagnoses at arthroscopy: synovitis, 7; degenerative joint disease, 5; subtalar dysfunction, 5; chondromalacia, 4; nonunion of os trigonum, 4; arthrofibrosis, 2; loose bodies, 1; and osteochondral lesions of the talus, 1. Overall, the results were 86% good-to-excellent in group 2.