The tibia (shinbone), talus and fibula (smaller bone in the lower leg) are the bones that construct the ankle joint. Your ligaments border these bones on either side, holding them together to provide stability. Meanwhile the tendons connect the muscles to the bone and are responsible for the ankle and toe movements.
Covering your bones is a smooth substance called cartilage, which acts as a cushion to reduce the friction between your bones as they move. If your cartilage wears down, arthritis can develop and cause loss of motion and pain.

