[The fibular incisure of the tibia. The cross-sectional position of the fibula in distal syndesmosis].

The ligamentous structure of the distal tibiofibular syndesmosis has been described by numerous authors. Yet the bony part, i.e. the fibular incisure of the tibia and the relationship of the fibula to this joint surface have hardly been dealt with. For this reason, we decided to investigate and typify the bony structures and the surrounding areas of the syndesmosis on 25 frozen cadaver feet. We found these could be divided into three groups: about 75% had concave surfaces, 16% convex surfaces, and in 8% typification was not possible because of irregular forms. In addition, measurements were taken that reflect the position of the fibula in the distal tibiofibular syndesmosis. These data are useful on X-ray examination of the ankle and are therefore of practical clinical significance.