[The lower ankle joint. Anatomic and pathophysiologic observations].

The lower ankle joint is highly variable in ligamental guidance. It has to be considered in unity with the upper ankle joint. Biomechanical investigations have shown the posterior lower ankle joint to be relatively unstable primarily in supination position. Radiological techniques are available to procedure radiographic evidence to that clinical instability of the lower ankle joint. A surgical approach to instability of both upper and lower ankle joints is proposed in this paper and is discussed in some detail.