Fractures of the distal interphalangeal joint.

Displaced fractures at the distal end of the middle phalanx require reduction if function is to be restored at the distal joint. Fractures at the base of the distal phalanx take on additional significance because of the insertions of the flexor and extensor tendons. The palmar articular fracture, when displaced, needs surgical replacement to restore flexor profundus function. In contrast, the displaced dorsal lip fracture, the mallet fracture, can be treated closed with the expectation of excellent results.