[Lateral instability of the ankle joint (2). Active training programs can prevent surgery].

One hundred consecutive patients with chronic lateral functional instability of the ankle were treated non-operatively with physiotherapy (active range-of-motion training, strengthening exercises and co-ordination training with a tilt-board). All patients were evaluated functionally with a special rating scale, and radiologically with standardised stress radiographs measuring anterior talar translation (ATT) and talar tilt (TT). Excellent or good functional results were obtained in 49 of the patients, fair or poor in the remainder. The outcome was better in those with painful functional instability or mild mechanical instability, while those with more pronounced mechanical instability required further treatment (i e, reconstructive surgery). Of 10 patients with generalised joint laxity, only fair or poor results were obtained in seven, all of whom had mechanical instability.