Minimally Invasive Distal Metatarsal Osteotomy For Surgical Treatment of Hallux Valgus: Clinical Study of the First 1000 Consecutive Cases at Mean 5 Years Follow Up

INTRODUCTION: Distal metatarsal osteotomies have been described for surgical treatment of hallux valgus with good results. The aim of this study is to review the results of our first 1000 consecutive hallux valgus cases treated by minimally invasive distal metatarsal osteotomy, SERI (Simple Effective Rapid Inexpensive). MATERIAL AND METHODS: 1000 feet in 641 patients (359 bilateral), aged between 20 and 65 years (mean 49) affected by hallux valgus without arthritis were studied. Inclusion criteria were deformity less than 40° and intermetatarsal angle up to 18°. A 1-cm medial incision at the metatarsal neck, and a complete osteotomy were performed using an oscillating saw. With the naked eye all characteristics of the deformity were corrected by displacement of the metatarsal head (HVA, IMA, PASA, dorsal or plantar displacement). The osteotomy was stabilized by a 2-mm Kirschner wire. Immediate weight bearing was allowed with gauze bandage and talus shoes for 4 weeks. All patients were checked at an average follow-up of 37 months. RESULTS: All osteotomies healed, delayed consolidation was observed in 25 feet. Slight stiffness was observed in 31 feet. Mean AOFAS score was 48+15 pre-op and 89+13 at follow up. The pre-op HVA was 32+8, while at follow-up it was 18+8 (p<0.005), pre-op IMA was 14+3, while at follow-up it was 6+4 (p<0.005), the pre-op PASA was 21+9, while at follow-up was 9+8(p