Minimally Invasive Bunion Surgery: MICA and Reverdin-Isham Techniques in 2026

Medically reviewed by Dr. Tom Biernacki, DPM — Board-Certified Podiatric Surgeon — Balance Foot & Ankle, Howell & Bloomfield Hills, MI. Last updated April 2026.

Minimally invasive surgery (MIS) for bunion correction has undergone a renaissance in the past decade, driven by the development of fluoroscopically guided percutaneous osteotomy techniques — most prominently the MICA (Minimally Invasive Chevron and Akin) procedure — that produce outcomes comparable to traditional open osteotomy with smaller incisions, faster recovery, and reduced soft tissue damage. Understanding who is an appropriate candidate for MIS bunion correction, how the technique differs from open surgery, and the current evidence base helps patients make informed decisions.

MICA: The Current Gold Standard MIS Bunion Technique

The MICA procedure combines a percutaneous distal first metatarsal chevron osteotomy (through a 3–5mm portal incision) with a percutaneous Akin closing wedge phalangeal osteotomy for hallux pronation correction, both performed under continuous fluoroscopic guidance. The osteotomies are fixed with dedicated percutaneous screws inserted through the same portal incisions. The key technical advance over earlier MIS techniques (which used burrs without fluoroscopic guidance and produced unpredictable correction) is the precision that fluoroscopic visualization and dedicated implants provide — allowing controlled, reproducible correction equivalent to open Chevron-Akin osteotomy. Major advantages: smaller scars (3–5mm portals vs. 5–8cm open incision); significantly less soft tissue dissection and periosteal stripping preserving blood supply; immediate weight-bearing in a surgical shoe in most cases (compared to non-weight-bearing for open osteotomy); and faster return to standard footwear (4–6 weeks vs. 6–10 weeks for open procedures).

Reverdin-Isham and Earlier MIS Techniques

The Reverdin-Isham osteotomy — an earlier minimally invasive percutaneous medial closing wedge osteotomy without internal fixation — is technically simpler but produces less correction and carries higher malunion risk from the lack of fixation. It remains used in some European practices for mild-moderate bunions but has largely been superseded by the MICA technique in practices performing high volumes of MIS bunion correction.

Appropriate Candidates

MIS bunion correction is appropriate for mild-to-moderate hallux valgus (HVA <40 degrees, IMA <18 degrees) in patients without significant first TMT joint instability. Severe bunions with significant first ray hypermobility or large intermetatarsal angles are better addressed with Lapiplasty (first TMT fusion) than MIS metatarsal osteotomy. Dr. Biernacki at Balance Foot & Ankle offers both open and minimally invasive bunion correction techniques and selects the appropriate procedure based on deformity severity and first TMT joint stability. Call (810) 206-1402 at our Bloomfield Hills or Howell office for a bunion consultation.

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When to See a Podiatrist

Many foot conditions can be managed conservatively at home, but some require professional evaluation. See a podiatrist promptly if you experience:

• Pain that persists for more than 2 weeks despite rest
• Swelling, redness, or warmth that isn’t improving
• Numbness, tingling, or burning in the feet
• A wound or sore that is not healing within 2 weeks
• Any foot concern if you have diabetes or poor circulation
• Nail changes that suggest fungal infection or other problems

At Balance Foot & Ankle, our three board-certified podiatrists — Dr. Tom Biernacki, Dr. Carl Jay, and Dr. Daria Gutkin — provide comprehensive foot and ankle care at our Howell and Bloomfield Township offices. Most insurance plans are accepted.

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Minimally Invasive Bunion Surgery in Michigan

MICA and percutaneous bunion correction techniques offer smaller incisions, less scarring, and faster recovery. Our surgeons are trained in the latest minimally invasive approaches.

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Clinical References

1. Vernois J, Redfern DJ. Percutaneous surgery for severe hallux valgus. Foot Ankle Clin. 2016;21(3):479-493.
2. Lai MC, Rikhraj IS, Woo YL, et al. Clinical and radiological outcomes of percutaneous surgery for hallux valgus. Foot Ankle Int. 2018;39(9):1076-1083.
3. Holme TJ, Sivaloganathan SS, Patel B, Kunasingam K. Third-generation minimally invasive chevron and akin osteotomy (MICA) for hallux valgus. Foot Ankle Int. 2020;41(1):50-56.

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Dr. Tom Biernacki, DPM is a double board-certified podiatrist and foot & ankle surgeon at Balance Foot & Ankle Specialists in Southeast Michigan. With over a decade of clinical experience, he specializes in heel pain, bunions, diabetic foot care, sports injuries, and minimally invasive surgery. Dr. Biernacki is a member of the APMA and ACFAS, and his patient education content on MichiganFootDoctors.com and YouTube has reached over one million views.