Minimally invasive bunion surgery: what the research says, and who it suits

A bunion is a bump at the base of the big toe where the toe drifts toward its neighbor; surgery is worth discussing only when it keeps hurting after a fair trial of wider shoes, pads and inserts.^[12,13,3] Here’s what the research shows about the “minimally invasive” version.

What “minimally invasive” means

Open surgery uses one incision long enough to cut the bone in direct view. Minimally invasive (percutaneous) surgery works through incisions researchers define as about 2 cm at most, shifts the bone under live X-ray because it can’t be seen directly, and holds it with one or two screws.^[1,2,14,3] The term describes the incisions, not the job. Our Center for Lower Extremity Surgery explains how it’s done (external site).

Where it does better: early pain, the wound and the scar

• Pain. In a randomized study of 50 patients, pain was lower after percutaneous surgery from day one to week six.^[4] In another, of 71 patients, day-one pain averaged 4.2 out of 10 versus 5.3 after open surgery.^[5]
• Scar and wound. In a non-randomized comparison followed for at least two years, scars were 1.2 cm versus 5 cm.^[15] A randomized trial of 40 feet found better wound healing at six weeks.^[6]

Where it’s equivalent: a year and beyond

A meta-analysis of seven controlled studies (395 feet) found no clinically important difference in function (88 versus 85 on a 100-point scale), pain, X-ray angles or complications; its authors suspected study weaknesses had inflated the apparent benefits and declined to recommend it over open surgery.^[1] A 2026 meta-analysis of the minimally invasive chevron technique (352 feet) found comparable function, pain and correction at every follow-up, with only small differences either way.^[16]

Other reviews lean each way: one called the approach more effective, another found better function after open surgery, and a living review found a possible edge for third-generation minimally invasive techniques in straightening the toe angle.^[7,8,17] The American Academy of Orthopaedic Surgeons still calls it not widely accepted and needing long-term research.^[3]

The trade-offs

• Complications. Neither meta-analysis found a significant difference.^[1,16] A review of 766 feet without a comparison group found complications in about 21%, which its authors judged comparable with open surgery.^[14]
• Screws. In a review of 1,088 procedures, 6.2% had hardware removed.^[10] In the non-randomized comparison above, 27% of minimally invasive feet had a second operation (mostly for protruding screws) versus 8% after open surgery (mostly for stiffness), and 14% were converted to open during surgery.^[15]
• Radiation. One trial measured 14 times more X-ray exposure, which its authors called small; a later study found doses within safety limits with a mini C-arm.^[2,18]
• The learning curve. One review put the plateau at 27 to 40 operations (about 36 on average); early cases took longer and used more X-ray, though outcomes weren’t clearly worse in those small studies.^[11] The meta-analysis above warned that patients may be harmed while surgeons learn.^[1]
• Recurrence happens after any bunion operation.^[19] In 78 of 126 feet operated on by an experienced surgeon and followed at least five years, 7.7% had drifted back past 15 degrees.^[20]

Who it suits, and what recovery looks like

The classic candidate has a mild-to-moderate bunion, no painful arthritis in the big toe joint, and a stable joint at the base of the first metatarsal; arthritis or instability points to a different operation (see big toe arthritis).^[9,8] For severe bunions, a review of 676 feet reported good results but few studies, and another says it “may” correct them better, mostly on single-surgeon series.^[21,22] Cut-offs between mild, moderate and severe vary between studies, with no agreed standard.^[23]

Almost all bunion surgery is same-day, and swelling is common for six months to a year.^[3] In one study of one technique (90 feet), median return to driving, work and normal walking was 4 weeks, low-impact sport 8, regular shoes 12, with wide ranges around each.^[24] The Center’s recovery timeline (external site) goes stage by stage.

How we decide

Dr. Efe Ozturk is a Foot and Ankle Surgeon and podiatrist who performs minimally invasive bunion surgery through our Center for Lower Extremity Surgery. Non-surgical care comes first (see what helps a bunion). Standing X-rays taken at the practice measure the angles and check for arthritis; with the examination, they guide the choice between small incisions, an open operation, or neither. Ask any surgeon how often they do the technique, whether they might switch to open, and how often their screws come out. A second opinion (external site) before elective surgery is reasonable.

Common questions

Is minimally invasive bunion surgery less painful?

In the first days to weeks, yes, in trials; by six months to a year, pain scores were similar.^[4,5,16]

Will the screws need to come out?

Usually not: 6.2% in one review, though one series reported 27% reoperations, mostly for protruding screws.^[10,15]

Can the bunion come back?

Yes, after any bunion operation; reported rates depend on the defining angle and the length of follow-up.^[19,20]

When to see a podiatrist