Early Outcomes of Minimally Invasive Surgery Using Percutaneous Technique for Hallux Valgus

CATEGORY: Bunion; Midfoot/Forefoot INTRODUCTION/PURPOSE: There are myriad procedures for hallux valgus deformity. Minimally invasive Surgery (MIS) using percutaneous technique has been recently introduced for the treatment of hallux valgus. The purpose of this study was to evaluate early radiological and clinical outcomes of MIS using percutaneous technique for hallux valgus deformity. METHODS: This was a prospective cohort study of 19 feet (13 patients) undergoing operative correction of hallux valgus using MIFS technique with minimum 2-year of follow-up. Outcome measures include the visual analogue scale (VAS) for pain and the American Orthopaedic Foot & Ankle Society Hallux-Metatarsophalangeal-Interphalangeal (AOFAS-HMI) scale, Foot Function Index (FFI), hallux valgus angle (HVA), 1-2 intermetatarsal angle (IMA), and distal metatarsal articular angle (DMAA). RESULTS: All patients were traced for a mean of 27.2 (range 24.7 - 30.4) months. The VAS, AOFAS-HMI scale and FFI were improved respectively with significance after operation (p<0.05). The mean HVA and 1-2 IMA showed significant improvements from 37.5’+-9.2 and 14.0+-3.1’ to 11.5+-7.9’ and 5.8+-3.6’ (p<0.05, p<0.05). The DMAA was decreased from 16.5+-3.9’ to 5.1+- 2.5’ (p<0.05). One patient underwent a revision surgery because of a screw loosening. CONCLUSION: The MIS using percutaneous technique for hallux valgus deformity achieved enough correction and relief of pain. All patients were satisfied with the clinical assessments. However, a long-term study is necessary to compare with other techniques.