Articular Facet Of The Medial Malleolus Of The Tibia, Anatomy

Description

Medial malleolus of the tibia fills the frame, with its articular facet highlighted as a flat, quadrilateral surface on the distal medial projection of the tibia. The facet lies inferior to the distal tibial plafond and faces inferolaterally toward the medial surface of the talar trochlea, forming the medial component of the ankle mortise. Anterior and posterior margins of the facet are defined by subtle ridges that transition into the nonarticular cortical bone of the malleolar tip, while the medial surface remains extra-articular for ligamentous attachment. Medial malleolar anatomy matters when you need to account for stability of the tibiotalar joint: even small step-offs or incongruity along this facet can change contact mechanics and contribute to post-traumatic ankle osteoarthritis. Fractures through the medial malleolus (including transverse avulsion patterns related to the deltoid ligament and vertical shear patterns extending toward the tibial plafond) are assessed by how they disrupt this articular surface and the mortise width, and they are commonly correlated with CT for joint depression and with radiographic ankle mortise views for talar tilt. Orientation is everything. Use this illustration in orthopedic and podiatric anatomy teaching, surgical technique manuals for medial malleolar fixation and ankle fracture classification, and radiology education that correlates cortical landmarks with the tibiotalar articular interface. Anatomical accuracy verified by SciePro's Medical Advisory Board.