Abstract
Some authors have reported acute scaphoid fracture with carpal instability; these cases are not rare.1,2 However there are only a few reports about established scaphoid nonunion assessed by x-ray, computed tomography, and arthroscopy. Our null hypotheses were as follows: (1) Scaphoid nonunion with scapholunate (SL) dissociation (SLD) is not rare, (2) scaphoid nonunion with SLD had severe dorsal intercalated segment instability deformity, (3) fracture patterns and/or lunate types are associated with SLD.
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