The human ankle joint, also known as the talocrural joint, connects the tibia and fibula bones of the leg with the talus bone in the foot. The deltoid ligament, also known as the medial ligament of the talocrural joint, holds the joint in place. The deltoid ligament is composed of four ligaments, one of which is the posterior tibiotalar ligament.

The posterior tibiotalar ligament is classified as a superficial fiber. It attaches to the inside of the talus and the medial malleolus. These ligaments are extremely durable such that they can support the weight of the body and the typical range of motion of the ankle joint.

Injuries to the ankle joint can injure the ligaments. The deltoid ligaments are at risk of being torn as a result of an ankle sprain. The posterior tibiotalar ligament is most easily visualized for the purpose diagnosis with conventional coronal plane imaging. The primary methods of treating an injury to the posterior tibiotalar ligament include rest, staying off of the injured foot, and elevating it as much as possible. It can take as long as four weeks to heal.