Minimally Invasive Fusion of the First Metatarsophalangeal Joint: A Technical Report

Abstract

Hallux rigidus, a common arthritic condition of the forefoot, affects a significant portion of the population, with ~8% of the population developing it at some point in their lives. Failure of first-line nonoperative treatment options may necessitate surgical treatment in symptomatic patients. Traditional surgical approaches include cheilectomy for milder cases and open arthrodesis for severe cases. The minimally invasive surgery approach to first metatarsophalangeal joint fusion is a novel technique that utilizes small incisions and arthroscopy for joint fusion. Fusion rates of 93% to 97% and low complication rates were reported by several studies on this technique. The technique involves percutaneous portal development, joint preparation and debridement, joint reduction, and fixation using k-wires and compression screws. The proper positioning of the toe is crucial to ensure optimal functional outcomes. Indications for this technique include advanced arthritis, significant scar tissue, and patient concern for cosmetic outcomes. Contraindications include poor bone quality, revision fusion, significant bone loss, active infection, or vascular compromise. Preoperative planning involves a comprehensive physical examination and imaging to assess the extent of the arthritis and any associated deformities. Complications of the procedure may include nonunion, malunion, iatrogenic thermal burns, and asymmetrical joint preparation. Postoperative management includes weight-bearing restrictions, regular follow-up visits, and gradual progression to normal activities. Preliminary results demonstrate promising outcomes for minimally invasive surgery first metatarsophalangeal fusions.