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Journal of Hand Surgery (British and European Volume)
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Articles

Correction of Dorsi-Flexed Intercalated Segment Instability after Restoration of Scaphoid Height in a Cadaver Model of Scaphoid Non-Union

M. YASUDA
M. KUSUNOKI
K. KAZUKI
Y. YAMANO

From the Department of Orthopaedic Surgery, Osaka City University Medical School, Osaka, Japan

Correspondence: Masataka Yasuda, MD, PhD, Department of Orthopaedic Surgery, Osaka City University Medical School, 1-5-7 Asahimachi, Abeno-ku, Osaka 545, Japan.

Models of scaphoid non-union with static dorsi-flexed intercalated segment instability were produced in five frozen arms from cadavers or subjects following accidents by repetitive mechanical loading of the wrist joints longitudinally after a bone defect has been made at the mid-portion of the scaphoid. We designed four models of reduction: anatomical reduction; reduction with a shortened scaphoid; anatomical reduction but with the radio-lunate ligament sectioned, and a shortened scaphoid with the radio-lunate ligament sectioned. Results suggested that anatomical reduction with rigid fixation with a Herbert screw was most effective for correction of malalignment with DISI. Preservation of the radio-lunate ligament during the palmar approach to the scaphoid seemed to be important to prevent ligamentous carpal instability.

Journal of Hand Surgery (British and European Volume), Vol. 20, No. 5, 596-602 (1995)
DOI: 10.1016/S0266-7681(05)80117-2
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