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I think it would be best to just break this down....subchondral..........situated beneath cartilage <subchondral bone>insufficiency..........inability of an organ or body part to function normally fracture.............the act or process of breaking or the state of being broken and or the breaking of hard tissue (as bone) Fractures of the Talar Head Talus fractures are relatively uncommon injuries, but can be associated with significant complications. The talus is involved in about 2% of all lower extremity injuries and about 5-7% of foot injuries. It is the most important bone of the foot to stabilize and mobilize soon after injury. Talus fractures are usually associated with hyperdorsiflexion of the ankle as the talar neck impacts the anterior margin of the tibia, such as in a motor vehicle accident or fall from height. The talus articulates superiorly with the tibia and fibula in the ankle mortise and the calcaneous and navicular inferiorly. Body weight is transmitted through the tibia to the superior surface of the talus. The anterior portion of the body is wider than the posterior portion giving stability to the ankle. The neck of the talus connects to the head which connects to the navicular and calcaneous and is the most vulnerable to fracture. The talus has no muscular or tendinous attachments, but has a groove for the flexor hallicus longus tendon. The majority of the talus is covered by articular cartilage. It articulates with the spring ligament inferiorly, the sustentaculum tali posteroinferiorly and the deltoid ligament medially.

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16y ago

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