Abstract
Heterotopic calcification can delay the rehabilitation process of the patient with severe head injury. This ectopic bone can cause limitation in range of motion and even ankylosis. The incidence of heterotopic calcification following severe head injury varies from 11 to 76%, and in 20-35% of patients with neurological impairment it may become a disability. The existence of this problem has long been recognized; its prevention has not been emphasized enough.