Posterior Tibiotalar Capsule

capsula articulationis tibiotalis posterior

The posterior tibiotalar capsule is the posterior wall of the ankle joint, reinforced by the posterior tibiotalar components of the deltoid and PITFL. It is the site of posterior ankle impingement from capsular fibrosis or synovitis.

Region: Lower Leg

Biomechanics

Function & Actions

Provides the posterior ankle joint boundary, limits excessive ankle plantarflexion, and is the capsule impinged between the posterior tibia and calcaneus during forced plantarflexion.

Clinical Relevance

Clinical Notes

Posterior ankle impingement syndrome from posterior capsular hypertrophy or os trigonum produces pain during forced plantarflexion — common in ballet dancers. Posterior ankle arthroscopy in prone position addresses posterior capsular pathology through posteromedial and posterolateral portals.

Pathology

Common Injuries & Conditions

Posterior Capsular Impingement in Ballet Dancers

Posterior tibiotalar capsule fibrosis and/or os trigonum impingement producing posterior ankle pain during forced plantarflexion, treated by arthroscopic posterior capsulectomy and os trigonum excision.