Early results of a new implant: 3.0 mm headless compression screw for scaphoid fracture fixation.

There has been a considerable evolution of screws used for internal fixation of scaphoid fractures. We discuss here, early results of a recently introduced implant Synthes 3.0 mm headless compression screw used for scaphoid fracture fixation. Twenty eight patients with scaphoid fractures (five acute and 23 nonunions) were treated with internal fixation by this non-variable pitch screw over a period of 18 months. All nonunions had pedicle vascularized bone grafting. All five patients with acute scaphoid fracture fixation had radiological healing at a mean of 8 weeks. Fifteen of 23 scaphoid fracture nonunions showed definite signs and a further seven showed probable signs of radiological healing at a mean of 8 months. One nonunion has failed to unite after surgery.