Within the ring, stability is provided by 2 bones: Medial malleolus of the tibia and lateral malleolus of the fibula 2 ligament complexes: Medially, the deltoid ligament; laterally, mainly the anterior and posterior talofibular ligaments and calcaneofibular ligament (see figure Ligaments of the ankle) Fractures that disrupt the ring in one place often disrupt it in another (eg, if only one bone is fractured, a ligament is often simultaneously and severely torn).