Fracture of any one of the four inner metacarpals can be reduced by upward or dorsal pressure on the flexed distal fragment, with the metacarpophalangeal and proximal interphalangeal joints of the involved finger held at 90 degrees of flexion. This position at the metacarpophalangeal joint relaxes the interosseous muscles and at the same time tenses the collateral ligaments, permitting extension (correction of the angulation) of the distal fragment through upward or dorsal pressure on the flexed proximal interphalangeal joint. This correction can be best maintained if the plaster-of-Paris dressing is applied in two sections: the first, to immobilize the proximal fragment; and the second, to maintain the correction.