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Rotary Subluxation of the Scaphoid: A Spectrum of InstabilityFrom the Connecticut Combined Hand Service: Hartford Hospital, University of Connecticut, Newington Childrens Hospital, Hartford, Yale University, New Haven, and University of Massachusetts, Worcester, USA Correspondence: H. Kirk Watson, MD, 85 Seymour Street, 816 Hartford, CT 06106, USA. Rotary subluxation of the scaphoid is not an "all or nothing" phenomenon, but a spectrum of instability including constant displacement of the scaphoid apparent on plain non-stress radiographs (the previously defined static type), subluxation seen only on loading X-rays or other special studies ("dynamic"), and instability demonstrable on physical examination but not by radiographic studies ("predynamic"). A clinical study of 1,000 random individuals was carried out to determine the incidence of unilateral hypermobility of the scaphoid. 21% of the subjects were found to have an abnormal difference in mobility between their scaphoids. The incidence of significant symptoms and physical findings associated with this hypermobility was determined.
Journal of Hand Surgery (British and European Volume), Vol. 18, No. 1,
62-64 (1993) |
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