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Hallux Valgus — Minimally Invasive Surgery (MIS)

Percutaneous and minimally invasive surgical correction of bunion deformity using small incisions, specialized burrs, and fluoroscopic guidance with techniques like MICA (Minimally Invasive Chevron-Akin), PECA, and percutaneous distal metatarsal osteotomy offering reduced recovery time and improved cosmesis.

Written by: Saygı Hospital Health Guide Editorial Board
Last updated:

This content has been compiled by the Saygı Hospital Health Guide Editorial Board and is periodically reviewed by a specialist physician.

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This content is for informational purposes only and does not constitute medical advice. You can book an appointment at our Ortopedi ve Travmatoloji department. Book Appointment →

What is Hallux Valgus — Minimally Invasive Surgery (MIS)?

Minimally invasive hallux valgus surgery (MIS) represents the evolution of bunion correction from traditional open techniques (Scarf, Chevron, Lapidus, Akin osteotomies) to percutaneous approaches using small 3-5 mm incisions, specialized burrs, fluoroscopic guidance, and modern internal fixation. Generations of MIS evolved: first generation lacked fixation with high recurrence, second generation added k-wire fixation, third generation introduced screw fixation enabling correction of moderate-to-severe deformities.

Modern third-generation techniques include MICA (Minimally Invasive Chevron-Akin osteotomy) using screw fixation of distal metatarsal Chevron osteotomy and proximal phalanx Akin osteotomy, PECA (Percutaneous Chevron-Akin), modified Lin osteotomy with translation and rotation, and percutaneous distal metatarsal osteotomies. Indications match traditional open surgery: mild-moderate (some surgeons severe) hallux valgus with HVA <40°, IMA <20°, congruent or incongruent joint, with absent or moderate arthritis.

Outcomes show comparable correction maintenance, AOFAS scores, and patient satisfaction compared to open techniques with significantly reduced soft tissue trauma, smaller scars, less postoperative swelling, faster early ambulation, and potentially less postoperative pain. Complications include nerve injury (dorsomedial cutaneous, deep peroneal), screw irritation requiring removal, recurrence, transfer metatarsalgia, and steep learning curve requiring specialized training and fluoroscopic equipment.

Symptoms

Bunion deformity with painful first metatarsophalangeal (MTP) joint
Difficulty wearing shoes due to medial bony prominence
Pain with weight-bearing and ambulation
Hallux deviation lateral (valgus) with rotation
Bursitis or skin breakdown over bunion prominence
Lesser toe deformities (hammer toes) and metatarsalgia
Sesamoid pain and arthritis from progressive deformity

Risk Factors

Female sex (10:1 female:male predominance)
Family history of hallux valgus (genetic component)
Tight or narrow-toed shoe wear (high heels, fashion shoes)
Hypermobile first ray (Lapidus indication)
Pes planus (flat foot) with overpronation
Ligamentous laxity (Marfan, Ehlers-Danlos)
Inflammatory arthritis (rheumatoid arthritis)

When to See a Doctor?

If you experience any of the following symptoms, seek medical attention promptly:

  • Bunion pain limiting daily activities or shoe wear
  • Failed conservative therapy: shoe modifications, orthotics, padding, splinting
  • Progressive deformity with worsening pain
  • Lesser toe involvement with metatarsalgia or hammer toes
  • Skin breakdown or recurrent bursitis over bunion
  • Considering surgical correction with interest in minimally invasive approach
  • Cosmetic concerns about deformity affecting quality of life

Treatment Methods

01
Conservative therapy first: wide toe-box shoes, bunion pads, custom orthotics, NSAIDs, activity modification
02
Comprehensive evaluation: clinical examination, weight-bearing radiographs (HVA, IMA, DMAA, congruency), gait assessment
03
Patient selection for MIS: appropriate deformity severity, patient understanding of technique, surgeon experience
04
Preoperative planning: osteotomy type selection, fixation strategy, expected correction goals
05
Surgical procedure: percutaneous bunion exostectomy, distal metatarsal osteotomy with translation/rotation, screw fixation, Akin osteotomy if needed, lateral release
06
Modern fixation: cannulated screws (compression or position), percutaneous insertion under fluoroscopy
07
Postoperative protocol: immediate weight-bearing in postoperative shoe, early ambulation, transition to regular shoes at 4-6 weeks, return to activities at 8-12 weeks, long-term follow-up

Which Department to Visit?

You can visit our Ortopedi ve Travmatoloji department for these complaints. Our specialist physicians will create the most suitable treatment plan for you.

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Health Disclaimer: The information on this page is prepared for general informational purposes only. It does not replace medical diagnosis and treatment. Please consult your physician for your complaints. Saygı Hospital does not accept responsibility for actions taken based on the information on this page.