Third-Generation Minimally Invasive Chevron Akin Osteotomy for Hallux Valgus: Three-Year Outcomes

Area of Science:

• Orthopaedic Surgery
• Foot and Ankle Surgery
• Minimally Invasive Procedures

Background:

• Hallux valgus is commonly treated with surgical interventions.
• Minimally invasive techniques are increasingly utilized for hallux valgus correction.
• Long-term outcomes of third-generation Minimally Invasive Chevron Akin (MICA) osteotomy require further investigation.

Purpose of the Study:

• To evaluate the three-year clinical and radiological outcomes of third-generation MICA osteotomy.
• To assess the sustainability of patient-reported improvements following MICA surgery.
• To determine patient satisfaction rates at a minimum three-year follow-up.

Main Methods:

• A cohort of 33 patients undergoing third-generation MICA osteotomy was retrospectively reviewed.
• Clinical outcomes were assessed using the American Orthopaedic Foot & Ankle Society (AOFAS) and Manchester-Oxford Foot Questionnaire (MOXFQ) scores.
• Radiographic outcomes, including hallux valgus angle (HVA) and inter-metatarsal angle (IMA), were measured at 36 months post-operatively.

Main Results:

• Significant improvements were observed in AOFAS scores (48.2 to 95.6) and MOXFQ scores (57.6 to 6.7) at 36 months.
• 81.8% of patients reported 'Excellent' and 18.2% reported 'Good' outcomes based on the Coughlin scale.
• Radiographic parameters improved, with mean HVA decreasing from 34.6 to 16.0 degrees and mean IMA from 13.1 to 6.1 degrees.

Conclusions:

• Third-generation MICA osteotomy provides sustained clinical improvement and high patient satisfaction.
• The technique demonstrates effective correction of hallux valgus deformity with long-term stability.
• Minimally invasive MICA osteotomy is a viable option for hallux valgus treatment with durable results.