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  • Title: Preoperative planning and intraoperative technique for accurate realignment of the Dwyer calcaneal osteotomy.
    Author: Lamm BM, Gesheff MG, Salton HL, Dupuis TW, Zeni F.
    Journal: J Foot Ankle Surg; 2012; 51(6):743-8. PubMed ID: 22999297.
    Abstract:
    The Dwyer calcaneal osteotomy is an effective procedure for the correction of calcaneal varus deformity. However, no intraoperative method has been described to determine the amount of bone resection. We describe a simple intraoperative method for assuring accurate bone resection and measure the realignment effects of the Dwyer calcaneal osteotomy. We also review radiographic outcomes associated with 20 Dwyer calcaneal osteotomies (in 17 patients) using the intraoperative realignment technique described in this report. Preoperative and postoperative radiographs at a mean of 2.5 (range 1.5 to 5) years taken after Dwyer osteotomy were measured and compared, which revealed a mean reduction in calcaneal varus of 18° (range 2° to 36°) (p < .001), a mean decrease in the calcaneal inclination angle of 5° (range -40° to 7°) (p < .05), a mean decrease in medial calcaneal translation of 10 (range 0 to 18) mm (p < .001) relative to the tibia, and a mean dorsal translation of 2 (range 0 to 7) mm (p = .002). In an effort to attempt to structurally realign the calcaneus to a more rectus alignment, by means of Dwyer osteotomy, we recommend the use of the intraoperative bone wedge resection technique described in this report. Our experience with the patients described in this report demonstrates the usefulness of the intraoperative method that we describe in order to accurately restore the axial tibial and calcaneal relationship.
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