[Indications, technique and results in treatment of the chronically unstable ankle joint].

This paper shall prove that with the chronic unstable ankle-joint the unit of both joints is to be taken into account. This unit consists anatomically as well as biomechanically and neuromuscularly. The practicable diagnostic of the instability in the lower ankle-joint ist presented. Then the known therapy methods are analysed. In our clinic some treatment methods for the single decompensate instabilities have proved success. The results of 119 operated decompensate ankle-joints are satisfied.