posterior talofibular ligament(redirected from PTFL)
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pos·te·ri·or ta·lo·fib·u·lar lig·a·ment[TA]
the nearly horizontal fibrous band that extends from the posterior border of the talus to the malleolar fossa.
Synonym(s): ligamentum talofibulare posterius [TA]
posterior talofibular ligamentAbbreviation: PTL
A ligament of the lateral ankle that attaches the posterior portion of the talus, and a portion of the posterolateral calcaneus, to the medial malleolus. The posterior talofibular ligament limits the excessive dorsiflexion and inversion of the talus within the ankle mortise.
See also: ligament
posterior talofibular ligament; PTFL posterior part of lateral collateral ligament of ankle joint; see Table 1
|Type||Characteristics of the injury to the ankle ligament|
|Grade I||History of mild inversion injury|
|Overstretching of lateral collateral ligament + microscopic tears of ATFL fibres|
|Stable ankle joint but some restriction in range of motion/weight-bearing|
|Mild local swelling without bruising/ecchymosis along lateral border of ankle|
|Pinpoint area of tenderness overlying area of ligament injury|
|Grade II||History of moderate inversion injury|
|Complete tear of ATFL and partial tear of CFL|
|Mild/moderate ankle instability with restricted range of motion|
|Moderate swelling over anterior lateral aspect of ankle with marked soft-tissue bruising/ecchymosis or haemorrhage in area of injury|
|Marked pain on direct palpation of ATFL|
|Grade III||History of severe inversion injury|
|Complete tear of ATFL, CFL and underlying joint capsule|
|Marked instability and laxity of ankle with positive anterior drawer test, talar inversion tilt and inability to evert foot at subtalar joint|
|Severe swelling along lateral border of ankle and heel with marked haemorrhage and ecchymosis|
|Discrete pain and tenderness of soft tissues overlying ATFL, CFL and anterolateral joint capsule|
ATFL, anterior talofibular ligament; CFL, calcaneofibular ligament.