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Correction of Intermetatarsal Angle in Hallux Valgus Using Small Suture Button Device

Background: Hallux valgus is a common foot ailment causing pain and disability, and correction of the intermetatarsal angle (IMA) deformity is often accomplished using a first metatarsal distal or proximal osteotomy. These osteotomies can be technically challenging and may lead to complications such as loss of fixation, shortening of the first metatarsal, avascular necrosis, malunion, and nonunion. Endobuttons (Mini TightRope device) provide an alternative to first metatarsal osteotomies for correction of the IMA. The purpose of this preliminary study was to determine the short-term clinical and radiographic outcomes of hallux valgus correction using the Mini TightRope. Methods: A total of 14 cases of hallux valgus correction using the Mini TightRope technique with a 1.1-mm drill and mini-buttress plate were reviewed. Clinical examinations and radiographs were performed preoperatively and postoperatively at 1-week (non-weight-bearing), 3-month (weight-bearing), and 6-month (weight-bearing) follow-up. Results: The overall 1-week postoperative decreases in IMA and hallux valgus angle (HVA) of all cases compared with preoperative status were 9 degrees and 28 degrees, respectively. Decreases in IMA and HVA continued at 3 months postoperatively but to a lesser extent, with decreases of 7 degrees and 20 degrees, respectively. Reductions in IMA and HVA were maintained through 6 months of follow-up compared with preoperatively, with IMA and HVA decreases of 6 degrees and 19 degrees, respectively. Two minor soft-tissue complications and 1 intraoperative second metatarsal fracture were treated with a buttress plate, with uneventful healing. Conclusions: Overall short-term results demonstrated notable improvements in IMA and HVA with use of the Mini TightRope, and few early complications were associated with the procedure. Level of Evidence: Level IV, retrospective case series.