Abstract

Category: Bunion Introduction/Purpose: A severe hallux valgus deformity in rheumatoid patient is usually treated with the 1st MTP fusion, since the high success rate with low percentage of recurrence leads to higher patient satisfaction. However the large 1st inter- metatarsal angle, sometimes, is not decreased after the fusion, and the patient may suffer the persistent bunion pain. We tried to solve this problem by performing the 1st MTP fusion and the 1st proximal metatarsal osteotomy in one stage. We report our surgical technique with the outcome analysis of the patients. Methods: Six patients with the severe rheumatoid hallux valgus deformity were followed for more than 12 months after the combined 1st MTP fusion and 1st proximal metatarsal osteotomy. All were women. The mean age of patients was 51.3 years, and the mean follow up period was 2 years and 1 month. Inclusion criterion was a rheumatoid hallux valgus deformity of more than 18 degrees of the 1st intermetatarsal angle. The MTP fusion was fixed with threaded Steinmann pins and the proximal metatarsal osteotomy was fixed with Kirschner wires through the single curvilinear skin incision. Clinically American Orthopaedic Foot and Ankle Society (AOFAS) hallux MP-IP scale, and patient’s satisfaction after the surgery were analyzed. Radiographically the union of the fusion and the osteotomy was investigated. Results: Clinically the AOFAS scale improved from the preoperative 51.2 points to the postoperative 84.3 points. All patients were satisfied with the results. There were no wound problem or nonunion of fusion/osteotomy. Conclusion: The combined 1st MTP fusion and 1st proximal metatarsal osteotomy was an effective and safe procedure for the severe rheumatoid hallux valgus deformity with the large 1st inter-metatarsal angle.

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