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Purpose  The aim of this study is to investigate the radiographic and functional results of die-punch fracture of distal radius treated by volar locking plate (VLP) or external fixation (EF).    Methods  Between January 2015 and June 2018, 87 patients who were treated with EF or VLP were included in this study. At postoperative 6 months and at least 12 months, radiographic and functional outcomes were evaluated, and compared between two groups using SPSS 21.0.    Results  The follow-up period was 15.6 months in average, and at the mean 8.5 weeks bony union was achieved in all patients. At 6-month visit, patients in VLP group had significantly better wrist flexion (79.2° vs. 71.8°) and pronation (79.5° vs. 75.2°) than those in EF group, but the difference was non-significant at the last visit (> 12 months); as for other parameters, no significant differences were observed. No significant difference was found between both groups in term of volar tilt, radial inclination, radial height, ulnar variance, or Gartland–Werley score and DASH. The articular step-off was significantly greater in EF than VLP group (0.6 mm vs. 0.3 mm,  p  < 0.001). The overall incidence of complications seemed higher in EF group (25% vs. 14%), but not approaching to the statistical significance level.    Conclusions  Patients with VLP fixation of die-punch fractures had better wrist flexion and pronation at 6-month visit and more favorable wrist joint congruence at the last visit, but ultimately their outcome was comparable with those treated by EF.

journal of orthopaedic surgery and research

Comparison of radiographic and functional results of die-punch fracture of distal radius between volar locking plating (VLP) and external fixation (EF)