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Purpose: Hamate coronal body fracture is a rare injury and often associated with dislocation of the carpometacarpal joint. For preserving the carpometacarpal joint, open reduction and rigid internal fixation is needed to displaced fracture. The purpose of this study was to evaluate the outcome of treating hamate coronal fracture with the screw fixation method through a temporary Kirschner wire (K-wire) fixation hole.Methods: From August 2016 to January 2021, eight patients who had displaced coronal hamate body fractures were enrolled. All patients were performed open reduction and multiple K-wires fixations. After that, the cortical screws were then inserted directly into the holes made by removing the K-wires one by one. The outcome measures were Disabilities of the Arm, Shoulder and Hand (DASH) scores and visual analogue scale (VAS) scores.Results: The average follow-up period was 11.5 months (range, 5–8 months) after surgery, and the bone union was observed at the 8 weeks after surgery. We confirmed that bone union had been completed for all the patients, and functional tests showed that the average DASH score was 3.95 (range, 0–8.3) and VAS score was 0.8 (range, 0–3).Conclusion: In coronal hamate body fractures, open reduction and screw fixation method through temporary K-wire fixation hole is simple and effective treatment technique.

Screw Fixation Method through Temporary Kirschner Wire Hole for Coronal Hamate Fracture