Triple arthrodesis. A, Oblique incision in sinus tarsi to expose subtalar, talonavicular, and calcaneocuboid joints. B, Cartilage and cortical bone removed from all joint surfaces; appropriate wedges are removed if necessary. C, Wedges necessary for correction of valgus deformity. D, Wedges necessary for correction of varus deformity. SEE TECHNIQUES 34.4 AND 34.5.