In total, three bones comprise your ankle joint: the lower portion of the tibia (shinbone), the lower part of the fibula, and the talus bone, which separates the heel bone from the tibia and fibula. The tibia is the broader bone in your calf, often referred to as the shinbone, while the fibula is the slenderer calf bone that extends from the knee to the ankle. These three bones in your ankle can be affected by eight different kinds of fractures, which are as follows: • Bimalleolar ankle fracture: involves both bony “knobs” on either side of the ankle, including both the fibula and tibia bone. • Bimalleolar equivalent fracture: occurs when the ligaments in the ankle are torn in addition to the fractured fibula and tibia ankle knobs. • Lateral malleolus fracture: involves the lower portion of the fibula, or the knob on the outside of your ankle. • Medial malleolus fracture: involves the lower portion of the tibia, or the knob on the inside of your ankle. • Pilon fracture: occurs at the top of the ankle and bottom of the shinbone, or tibia, and often involves the fibula, as well. • Posterior malleolus fracture: occurs at the back of the tibia in the ankle joint. • Talus fracture: involves a break in the talus, which lies between the tibia, fibula, and heel bone. • Trimalleolar fracture: occurs when all three parts of the ankle, the medial, lateral, and posterior, are all fractured.