The talocrural joint is a hinge formed by the tibial plafond and both malleoli cradling the talar dome — the ankle mortise — most stable in dorsiflexion where the wider talus locks in the mortise.
Most commonly injured joint in sport. Weber classification guides fracture management. Plantarflexion instability explains why lateral sprains dominate.
Plantarflexion-inversion tearing the ATFL — the most common musculoskeletal sport injury.
Malleolar fractures from rotation classified by Weber system — stability determines operative versus conservative management.
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