What are the causes for Broken Ankle
(Ankle Fracture)?

When a person stresses the ankle joint beyond the strength of its elements, the joint becomes injured.
  • If only the ligaments give way and tear, the damage is a sprained ankle.
  • If the ligaments that stabilize the joint are completely disrupted, the bones can come apart and the ankle can become dislocated.
  • If a bone gives way and breaks, the damage is an ankle fracture.
  • Fractures can occur with simultaneous tears of the ligaments. This can happen in several ways:
    • Rolling the ankle in or out
    • Twisting the ankle side to side
    • Extreme flexing or extending of the joint
    • Severe force applied to the joint by coming straight down on it as in jumping from a high level

Source: http://www.emedicinehealth.com