A genioplasty is a surgical procedure that reshapes the chin by cutting and repositioning the bone. Unlike chin implants, which place a synthetic material over existing bone, a genioplasty modifies the skeletal structure itself. It’s used for both cosmetic reasons (improving facial balance) and functional ones, like opening the airway in people with obstructive sleep apnea.
Types of Genioplasty
The procedure is categorized by what direction the bone moves and what problem it solves. The most common version is a sliding genioplasty, where a surgeon makes a horizontal cut through the chin bone and shifts the freed segment forward, backward, up, or down before securing it in its new position.
Within that framework, the specific types include:
- Advancement genioplasty: moves the chin forward, used when the chin is too small or recessed (a condition called microgenia)
- Setback genioplasty: moves the chin backward to reduce excess projection
- Vertical augmentation: lengthens the chin using bone grafts, improving lower facial balance
- Vertical reduction: shortens an overly tall chin by removing bone
- Narrowing genioplasty: tapers a wide chin for a slimmer contour
Surgeons often combine movements in a single procedure. For example, a chin can be advanced and vertically shortened at the same time. This flexibility is one of the main advantages a genioplasty has over implants.
How Surgeons Plan the Procedure
Before surgery, imaging and measurements help determine exactly how far and in which direction the chin needs to move. One commonly used reference is the Ricketts E-line, an imaginary line drawn from the tip of the nose to the tip of the chin. In a balanced profile, the upper lip sits about 4 mm behind this line and the lower lip about 2 mm behind it. Deviations from these proportions help guide how much correction is needed.
Modern planning typically involves 3D imaging that lets the surgeon simulate the result before making any cuts. This is especially important because the bone-to-soft-tissue translation in a genioplasty is about 85%, meaning if the bone moves 10 mm, the visible chin contour shifts roughly 8.5 mm. That ratio is more predictable than with chin implants, where only about 66% of the augmentation translates to the surface.
What Happens During Surgery
The incision is made inside the mouth, along the lower gum line, so there’s no visible scar on the face. The surgeon exposes the chin bone, makes a horizontal cut below the tooth roots, then repositions the freed segment. Metal plates and screws hold the bone in its new position while it heals.
Genioplasty can be performed under general anesthesia or, in some cases, under local anesthesia as an outpatient procedure. A prospective trial across two university centers found that sliding genioplasty under local anesthesia had minimal pain and high patient acceptance. That said, when the procedure is combined with other jaw surgery, general anesthesia and a hospital setting are standard.
Genioplasty vs. Chin Implants
Chin implants are a simpler, shorter procedure. A surgeon places a pre-shaped piece of silicone or porous polyethylene over the existing bone. Recovery is typically faster, and the operation itself is less invasive. But implants come with their own set of trade-offs.
Infection rates with implants run as high as 23.8% in some studies. Silicone implants are easier to place and remove but carry higher risks of shifting out of position and gradually eroding the bone underneath, a process called subperiosteal resorption that becomes more apparent over years. Porous polyethylene implants integrate with surrounding tissue, reducing displacement risk, but that tissue integration makes them much harder to remove if something goes wrong.
A genioplasty avoids the foreign-body risks entirely since you’re working with your own bone. The main downside is temporary numbness: the mental nerve, which provides sensation to the lower lip and chin, runs through the surgical area. Temporary numbness affects a large proportion of patients, and persistent numbness occurs in roughly 7% to 12.5% of cases. Mental nerve injury has been reported in up to 10% of patients when an osteotomy is performed, partly because the nerve’s exact path varies from person to person.
Some bone resorption also happens with genioplasty. Larger advancements (averaging about 12 mm) can lose around 24% of the initial advancement over the first six months as the bone remodels. Implants may show better long-term positional stability in some cases, though their other complications can offset that advantage.
Functional Benefits for Breathing
Genioplasty isn’t purely cosmetic. When the chin bone is moved forward, it pulls the tongue muscle attachment forward too, creating more space behind the tongue and reducing airway collapse during sleep. This makes advancement genioplasty a treatment option for obstructive sleep apnea.
The numbers are meaningful. In studies measuring airway changes, total airway volume increased by an average of 8.5% after genioplasty, with the greatest expansion in the throat area behind the tongue. The space behind the airway widened by an average of about 3 mm. Two studies tracking sleep apnea severity found that the apnea-hypopnea index (a measure of how many times breathing stops per hour) dropped from 27.7 to 12.7 in one group and from 12.4 to 4.4 in another. Snoring severity improved as well.
For this airway benefit to work, the surgeon needs to ensure the cut captures the attachment point of the tongue muscle on the inner surface of the chin bone. If the cut is placed too low, the tongue muscle stays put and the airway benefit is lost.
Age and Candidacy
The chin bone can’t be safely cut and repositioned until certain teeth have fully come in. The permanent canines, which typically erupt around age 12 to 13, sit in the path of the osteotomy line. Once those teeth are through, the procedure becomes feasible. Research in growing patients suggests that when a genioplasty is clearly indicated, performing it before age 15 produces better bone remodeling outcomes than waiting until adulthood.
For adults, there’s no upper age limit as long as general health supports surgery. Candidates typically include people with a recessed or overly prominent chin, facial asymmetry, or sleep apnea that hasn’t responded well to other treatments. Genioplasty is frequently performed alongside broader jaw surgery (orthognathic surgery) to achieve a balanced result across the entire face.
Recovery Timeline
The first few days after surgery are liquid-only. Your jaw will be swollen and sore, and chewing is off the table. After several days, most surgeons transition patients to a soft, no-chew diet: think mashed potatoes, yogurt, scrambled eggs, and smoothies.
This soft diet phase lasts three to six weeks, sometimes longer if the genioplasty was part of a larger jaw procedure. Your surgeon will specifically clear you before you return to solid foods. Swelling peaks around the second or third day and gradually resolves over several weeks, though subtle swelling can linger for months. Numbness in the lower lip and chin is normal in the early weeks and usually resolves on its own, though as noted above, a small percentage of patients have some lasting change in sensation.
Most people return to desk work or school within one to two weeks. Contact sports and strenuous activity typically need to wait six weeks or more to protect the healing bone and hardware.
Cost and Insurance
Genioplasty costs vary widely depending on the surgeon, geographic location, and whether it’s combined with other procedures. In the United States, the range typically falls between $3,000 and $15,000 for the surgeon’s fee alone, with total costs (including anesthesia, facility fees, and imaging) potentially higher.
Insurance coverage depends entirely on why the surgery is being done. Purely cosmetic genioplasty is almost never covered. When the procedure is performed to correct a birth defect, restore form after an injury, or treat a functional problem like obstructive sleep apnea, coverage becomes more likely. Documentation of the medical necessity, including sleep studies or evidence that other treatments have failed, is usually required for approval.