Capitolunate arthrodesis maintaining carpal height for the treatment of SNAC wrist

The clinical and radiological results of a modified midcarpal fusion technique for scaphoid nonunion advance collapse were retrospectively studied in eight patients. All had partial resection of the proximal part of the fractured scaphoid, limited radial styloidectomy, scaphocapitate and lunocapitate arthrodesis, using a block of iliac crest graft to maintain carpal height. All united without complications and wrist motion, grip strength and carpal height were improved postoperatively. The modified Mayo wrist score at follow-up was 70%. Three patients continued to have some pain and one patient had a poor result.