Coronal dorsal hamate fractures.

Four patients with a rare injury, coronal fracture of the dorsal hamate with associated dorsal subluxations of the ring and small metacarpal bases were treated with open reduction and internal fixation with the use of cortical mini-lag screws and Kirschner wires. Average follow-up was 12 months (range, 6 to 19 months). Subjective patient assessment and objective strength, range of motion measurements, and radiographs demonstrated excellent overall results. Open reduction and internal fixation is recommended for the treatment of this unusual fracture-subluxation.