Subtalar dislocation.

Eleven medial subtalar dislocations, two of them open, were treated during the decade from 1969 to 1978 in four metropolitan Detroit hospitals. There was one open lateral dislocation. Eight patients were available for follow-up study. None of the dislocations was associated with a major fracture of the talus. The average time between injury and our follow-up was twenty-eight months. A simple qualitative method of measuring range of motion of the subtalar joint was devised. All of the patients had some loss of subtalar motion, but the lateral dislocation was the only one causing important disability.