Proximal interphalangeal joint fracture dislocations: stable and unstable.

Injuries to a competitive athlete's hand are common occurrences routinely treated by team training staff and physicians. These injuries are particularly prevalent in contact and ball catching sports. Although timely recognition and treatment of these injuries can avoid lifelong morbidity, the initial presentation may be deceptively benign. These injuries are classified according to the pattern of fracture and the resultant stability of the joint. Treating physicians must have an understanding of the biomechanics, injury patterns, assessment, and treatment guidelines in order to identify these injuries and provide for the earliest safe return to play with the best functional outcome for the athletes.