Micro Screw Fixation for Small Proximal Pole Scaphoid Fractures with Distal Radius Bone Graft

摘要

>Background  Achieving adequate fixation and healing of small proximal pole acute scaphoid fractures can be surgically challenging due to both fragment size and tenuous vascularity. >Purpose  The purpose of this study was to demonstrate that this injury can be managed successfully with osteosynthesis using a “micro” small diameter compression screw with distal radius bone graft with leading and trailing screw threads less than 2.8 mm. >Patients and Methods  Patients with proximal pole scaphoid fragments comprising less than 20% of the entire scaphoid were included. Fixation was accomplished from a dorsal approach with a micro headless compression screw and distal radius bone graft. Six patients were included. Average follow-up was 44 months (range, 11–92). >Results  Mean proximal pole fragment size was 14% (range, 9–18%) of the entire scaphoid. The mean immobilization time was 6 weeks, time-to-union of 6 weeks, and final flexion/extension arc of 88°/87°. All patients had a successful union, and no patient had deterioration in range of motion, avascular necrosis, or fragmentation of the proximal pole. >Conclusion  Small diameter screws with a maximal thread diameter of ≤ 2.8 mm can be used to fix the union of proximal pole acute scaphoid fractures comprising less than 20% of the total area with good success. >Level of Evidence Therapeutic case series, Level IV.