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Change in capitate shift after osteotomy for distal radial fracture malunion
Nick A Johnson1,2, Gar-Ling Simcock2, Dupinderjit Rye2
1Academic Team of Musculoskeletal Surgery, University Hospitals of Leicester NHS Trust, Leicester, UK.
Abstract:
Loss of anterior tilt after a distal radial fracture can lead to carpal malalignment, which may cause functional impairment. The aim of this study was to establish whether distal radial osteotomy for malunion, which primarily restores the dorsal tilt, will also improve carpal malalignment as measured by capitate shift. Radiographs of 67 patients who underwent osteotomy after malunion of a distal radial fracture were reviewed. Measurements of capitate shift and dorsal tilt were recorded. Linear regression modelling was used to assess the relationship between dorsal tilt and capitate shift. Change in capitate shift was strongly associated with change in dorsal tilt following osteotomy. This relationship was maintained on long-term radiographs. Capitate shift is strongly related to dorsal tilt following a distal radial fracture. Correcting the dorsal tilt during an osteotomy, therefore, will improve capitate shift and carpal malalignment. Capitate shift is unrelated to age, sex and is easy to visually assess.Level of evidence: IV.
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