Scapho-Lunate Instability
Most common carpal instability; due to disruption of scapholunate ligament. Clinical: wrist pain, weakness, clicking; positive Watson’s test. Radiology: gap >3 mm (‘Terry Thomas sign’), DISI deformity. Acute injury—repair; chronic—reconstruction or salvage (four-corner fusion). Untreated cases progress to SLAC wrist (Scapholunate Advanced Collapse).
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10What is the most common cause of scapholunate instability?
mcqWhich clinical test is most commonly used to assess scapholunate instability?
mcqWhat radiological sign is indicative of scapholunate instability?
mcqWhat is the typical mechanism of injury for scapholunate instability?
mcqWhich of the following conditions may result from untreated scapholunate instability?
mcqIn the Geissler grading system, what does a Grade II injury indicate?
mcqWhat is the recommended treatment for an acute scapholunate ligament tear?
mcqWhat is the characteristic deformity seen in scapholunate instability?
mcqWhich of the following statements about the scapholunate ligament is true?
mcqWhat is the long-term outcome of untreated scapholunate instability?