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  • Title: Modified Mitchell osteotomy with screw fixation for correction of hallux valgus.
    Author: Huang SH, Cheng YM, Chen CH, Huang PJ.
    Journal: Foot Ankle Int; 2012 Dec; 33(12):1098-102. PubMed ID: 23199860.
    Abstract:
    BACKGROUND: The authors have performed more than 1500 cases of a Mitchell osteotomy and traditionally used two crossed pins for fixation. The previous series showed some complications related to pin tract infection, pin migration, and transfer metatarsalgia. Since 2009, the authors have used a compression screw for fixation and made some technical modifications and the results are reported in this article. METHODS: A total of 95 patients underwent a Mitchell ostotomy to correct hallux valgus deformity with fixation with multi-use compression (MUC) screws. Hallux valgus angle (HVA), intermetatarsal angle (IMA), the American Orthopaedic Foot and Ankle Society (AOFAS) hallux metatarsophalangeal-interphalangeal scale were measured preoperatively and postoperatively. RESULTS: ~There were statistically differences between the preoperatively and postoperatively HVA, first IMA, and AOFAS hallux metatarsophalangeal-interphalangeal scores. Five patients (8/137 feet, 5.8%) underwent removal of the screw because of screw tip irritation. Eight patients (9/137 feet, 6.5%) had transfer metatarsalgia of the second metatarsal, with two of them caused by dorsal tilt of the metatarsal head. One patient (1/137 feet, 0.7%) had undercorrection. There was no superficial infection, deep infection, nonunion, or osteonecrosis of the first metatarsal head. CONCLUSION: On the basis of the results observed in this study, it appears that the use of a multi-use compression screw provides satisfactory stabilization of the modified Mitchell osteotomy and was not associated with any serious complications. The modified technique also helped reduce transfer metatarsalgia.
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