Tibiofibular Syndesmosis

Anatomy Understanding the tibiofibular syndesmosis needs an inclusive knowledge of the surrounding anatomic structures.

Talocrural joint The ankle, or talocrural joint, is a modified-hinge, uniaxial joint formed by the medial malleolus of the tibia, the talus and the lateral malleolus of the fibula. Specifically, the convexsuperior articular surface of the talus or trochlea articulates with the concave distal articular facet of the tibia. The medial malleolus articulates with the medial aspect of the trochlea whereas the lateral malleolus articulates with the lateral aspect of the trochlea. Stability of the ankle mortise is enhanced because the talus has dome shaped body fits snugly into the slightly concave tibial undersurface. The relation of the tibia, fibula, and talus is maintained by an articular capsule and 3 groups of ligaments (medial, lateral,and syndesmosis).

Tibiofibular Syndesmosis: The articulation between the tibia and fibula can be divided into three zones: the proximal tibiofibular joint, the interosseous membrane and the distal tibiofibular joint or distal tibiofibula syndesmosis. The proximal tibiofibular syndesmotic joint stabiliezed by posterior superior tibiofibular and anterior superior tibiofibular ligaments, this

The fibula sits in a groove created by bifurcation of the lateral ridge of the tibia into the anterior and posterior margins of the tibia, approximately 6-8cm above the level of the talocrural joint. The anterior margin ends in the anterolateral aspect of the tibial plafond called the anterior tubercle, or Chaput’s tubercle. The posterior margin ends in the posterolateral aspect of the tibial plafond called the posterior tubercle, or Volkmann’s tubercle. The apex of this fibular notch is the incisura tibialis, which has a depth that