Herbert Screw Fixation of Scaphoid Fractures.

Forty-four scaphoid fractures treated with open reduction and internal fixation using the Herbert screw were available for evaluation at an average follow-up period of 2.1 years and a range of 1 to 6 years. They were classified according to Herbert into 25 unstable (type B); 8 delayed unions (type C); and 11 nonunions (type D). Bone grafting was required in 22 cases. Sound radiological union was achieved in 42 cases at an average of 3.2 months. The two nonunions healed after revision grafting. Using the Mayo wrist score, excellent results were achieved in 14 cases; good in 22; fair in 4; and poor in 4. Poor results were associated with nonunion in two; untreated scapholunate dissociation in 1; and screw protrusion in 1.