Scaphoid Non-Union with D.I.S.I. Deformity

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Abstract
To clarify whether or not scapho-lunate ligamentous injury is common in scaphoid non-union with D.I.S.I. deformity and whether ligamentous repair is required to treat scaphoid non-union with D.I.S.I. deformity, roentgenographic, arthrographic and arthroscopic findings were analysed and compared to those of scaphoid non-union without D.I.S.I. deformity. The carpal alignment of scaphoid non-union with D.I.S.I. deformity treated by reduction and anterior wedge grafting without ligamentous repair was also studied. No significant difference in the scapho-lunate gap was present between 26 patients with D.I.S.I. deformity and 20 without. No statistically significant difference was detected in the incidence of arthrographically-proved scapho-lunate ligamentous tears between the two groups. Arthroscopic examination carried out in 22 patients did not detect massive ligamentous injury, and carpal alignment was satisfactory in most patients who underwent anterior wedge grafting. These results show that ligamentous injury rarely causes D.I.S.I. deformity in scaphoid non-union, and anterior wedge grafting alone is sufficient to correct D.I.S.I. deformity in most cases.

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