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Keyhole Bunion Surgery—also known as minimally invasive bunion surgery (MIS)—is a modern surgical technique used to correct bunions (hallux valgus) through small incisions, without fully opening the foot.Here are 5 keyhole (minimally invasive) bunion surgery techniques explained, offering less pain, smaller scars, and faster recovery.
1. Minimally Invasive Chevron and Akin Osteotomy (MICA) - A popular keyhole method combining two bone cuts—Chevron (at the metatarsal head) and Akin (at the base of the big toe).Less soft tissue damage, reduced swelling, faster walking recovery.
2. PECA (Percutaneous Chevron and Akin Osteotomy) - A fully percutaneous variant of MICA.Performed entirely through 2–3 mm skin punctures using burrs and fluoroscopy (X-ray guidance).Extremely small scars, minimal postoperative pain, early weight-bearing.
3. Minimally Invasive Scarf Osteotomy - A refined version of traditional scarf osteotomy, done via keyhole incisions.Strong correction for moderate-to-severe bunions with less visible scarring.
4. Minimally Invasive Reverdin-Isham Technique - A gentle correction for mild bunions using a burr.A wedge of bone is removed near the metatarsal head without any screws.Simple, quick, and suitable for early-stage bunions; minimal invasiveness.
5. Distal Minimally Invasive Metatarsal Osteotomy (DMMO) - Often used in combination with other techniques for metatarsal alignment.Corrects metatarsal overload and relieves pain, especially when bunions are accompanied by other foot deformities.
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