Jaw and Chin Masculinization

Who it’s for

People with a narrow, tapered or receding lower face who want a wider jaw or a stronger chin. And who have let testosterone show what it will do first. Most surgeons want a year or more on testosterone before planning implants.

The face loses fat and the masseters, the chewing muscles over the jaw angles, bulk up. A jaw that looked soft at six months can look fine at three years. If you are not taking testosterone, the plan is what you see in the mirror now.

Which operation suits you depends on what is actually wrong with the shape. A chin that is set back but the right height suits an implant. A chin that is short from top to bottom, or off to one side, needs a genioplasty.

An implant can only add to the front and sides. Jaw angles are implant territory either way. There is no bone operation that widens the back of the jaw the way an implant does.

Two groups should look elsewhere first. If the chin is small because the whole lower jaw sits back, an orthodontist or oral surgeon may recommend moving the jaw forward instead. A chin operation on its own only masks that profile. And if your gums or teeth are in poor shape, the incisions inside the mouth are a problem. Most surgeons want dental work finished first.

Testosterone is not required. What surgeons care about is nicotine, because it slows the healing of the mouth incisions and raises the infection risk around an implant. See eligibility.

Before you book

Decide how you feel about carrying a piece of silicone in your face for life, and say so at the consultation. Some people do not mind and some hate the idea, and that settles implant or genioplasty before any measurement does.

How it’s done

Before anything else, the surgeon works out the shape on your photos or a CT scan. Custom implants milled from a scan of your own jaw are common now for the angles. That planning stage decides more about the result than the operation itself.

Under general anaesthetic, a chin implant goes in through a short incision inside the lower lip or, less often, under the chin. The surgeon lifts the soft tissue off the bone and makes a pocket the exact size of the implant. It slides onto the front of the chin and is usually fixed with a screw. Silicone and porous polyethylene are the usual materials. Silicone sits in a thin shell of scar tissue and comes out easily; porous polyethylene lets tissue grow into it, so it moves less and is harder to remove.

A sliding genioplasty starts the same way, through the lip. The surgeon then cuts horizontally through the chin bone, below the tooth roots and below the mental nerve, the one that gives the lower lip and chin their feeling. It leaves the jaw at about the corner of the mouth. The freed segment of bone slides forward, down, or sideways into its new position and is held there with a small titanium plate. Because it is your own bone, it can lengthen a short chin, and it can be shifted to correct asymmetry.

Jaw angle implants go in through incisions along the back of the lower gum on each side. The surgeon lifts the masseter muscle off the bone, seats the implant over the angle, and screws it to the jaw. Widening the angle sideways, lengthening it downward, or both, depends on the implant. All of the incisions are closed with dissolving stitches inside the mouth, and you wake up in a chin strap.

The week before

Stock the fridge with two weeks of food you can eat without chewing, and practise drinking from a cup with your lower lip numb. Soup, yoghurt and smoothies stop being fun by day four, so buy more variety than you think you need.

Jaw and chin recovery

The first week is mostly about the mouth. The stitches inside the lip pull when you talk. The lower lip feels like it belongs to someone else. The swelling makes your face look wider than it ever will once it settles.

You eat soft food, rinse with an antibiotic mouthwash after every meal, and sleep with your head up. It is uncomfortable rather than painful. Jaw angle implants ache more than a chin, because the masseter has been lifted off the bone and complains every time you chew.

The part nobody warns you about is how long the swelling lasts. The obvious swelling drops in two weeks, and you can go back to a desk. Then the lower face stays subtly puffy for months, and jaw angles are the slowest of all, because the muscle over them is thick. People I have walked through this often hate the result at week three and like it at month four. I would plan not to judge the shape before then.

In the first month

Take a straight-on photo every week in the same light and do not look at them until month three. The lower face changes too slowly to see day to day. Week three is the point where most people decide it has all gone wrong.

Jaw and chin scars

There is almost nothing to see. The incisions sit inside the lower lip and along the back of the lower gum. They heal into soft lines you can feel with your tongue and nobody else can find. If the surgeon used the route under the chin for a chin implant, there is a scar of roughly 2–3 cm tucked into the crease under the jaw. It fades to pale within a year and a beard hides it.

The thing to look after is the mouth, not a scar. The gum incision over a jaw angle implant is the one that opens up if you chew too soon or skip the mouthwash. An open incision over an implant is how infections start.

Sensation after jaw and chin

The mental nerve gives feeling to the lower lip and chin. It runs straight through the field of every one of these operations. Expect the lower lip and chin to be numb after surgery, then to tingle and itch for weeks as the nerve wakes up. Most people have normal feeling back by three to six months. Dribbling from a cup and biting the lip while eating are common early on and pass.

A small minority keep some permanent numbness, most often a patch on one side of the lower lip. Published figures vary with the operation, and genioplasty carries a higher chance than a chin implant, because the bone cut passes close to the nerve. Jaw angle implants rarely touch it. Movement of the lip is a separate nerve and is very rarely affected.

Skin feeling over the jaw angles can be dull for months where the muscle was lifted, and comes back on its own.

Risks and complications

The early risk that matters is infection. It is higher here than for implants elsewhere, because the incisions are inside the mouth and the mouth is not clean. An infected implant usually has to come out, wait several months, and go back in. That is the scenario to ask about before you book. Hematoma and wound opening at the gum incision are the other early ones.

The later problems are about position. Jaw angle implants can shift, sit at different heights, or show an edge you can feel through the cheek. A revision to reseat one is not unusual. Chin implants can drift to one side.

Over years they can wear a shallow dent into the bone under them, which rarely matters unless the implant has to be replaced. A genioplasty avoids all of that. In exchange it carries the risks of bone surgery, which are injury to a tooth root, a plate you can feel, and, rarely, bone that fails to knit back together.

The risk specific to this procedure is the nerve. It is covered in sensation above, and it is the one to weigh against the shape you want.

Jaw and chin results

At a year, a wider face from the front and a chin that reads as male in profile. The chin change is the more reliable of the two. Chin implants and genioplasties are common operations with predictable outcomes, and the profile difference is obvious in photos.

Jaw angle implants are the less predictable half. They give the width most people are actually after, but they are harder to place symmetrically. And they sit under a muscle that keeps changing on testosterone, so the look can strengthen for a year or two after surgery.

What tends to disappoint is size. Angles that are too big look like a shelf rather than a jaw. Once the swelling has gone, some people find the surgeon was right to be conservative. The results that look best in galleries a year on are the ones where the chin and angles were planned together. Not the chin first and the angles added later.

Alternatives to jaw and chin

If the jaw is the feature that bothers you, there is no alternative operation, only a choice between the ways of doing it. The chin is the decision. An implant if the chin needs only to come forward and can be undone. A genioplasty if it needs to lengthen or straighten, or if you would rather carry nothing foreign in your face.

Fillers along the jawline are a reasonable way to see whether you like a stronger lower face before committing. They are softer and less defined than an implant, and they do not build the bony edge that reads as masculine. They also need repeating every year or so.

If your face reads as feminine but you are not sure which feature is doing it, look at the brow first. Brow and jaw carry the signal together, and a surgeon will often say the forehead is the one to fix.

Combining jaw and chin with other surgery

Jaw and chin work is often done in one operation with forehead and brow work. The two together change the face more than either alone, and one anaesthetic saves a recovery. Surgeons who do a lot of facial gender surgery plan them as a set. Cheek implants and Adam's apple augmentation can be added to the same operation, though the neck incision means a second area to heal.

It is rarely combined with chest or genital surgery. A mouth full of stitches and a soft diet do not sit well with a long recovery elsewhere. See surgery order.

Jaw and chin cost

The quote depends on what is in it. A chin implant alone sits at the bottom of the range, and a sliding genioplasty or a pair of jaw angle implants pushes towards the middle.

Custom implants milled from a CT scan add a good deal on top. Having chin and angles done together is common, and cheaper than two operations. Ask whether the quote is all-in, with surgeon, anaesthetist, facility and the implants themselves. Implants are sometimes billed separately.

Insurance in the US rarely covers masculinizing jaw surgery unless there is a functional bite problem. What the quote rarely includes is the CT scan, the chin strap, mouthwash and soft-food weeks, and any revision to reseat an implant. Ask about the revision policy. It matters more here than for most facial procedures.

Choosing a jaw and chin surgeon

The surgeons who do this well are craniofacial or facial plastic surgeons who work on the jaw for a living, and who often do the reverse operation for trans women. The two numbers I would ask for are jaw angle implants placed a year, and how many they have had to take out or reseat. A surgeon who has never removed one has not placed many.

In the photos, look at the results straight on, not just in profile, because the jaw angle change only shows from the front. Check whether the two sides match, and whether the angle blends into the jawline or sits on it like a step. Then ask the one question that shows experience, which is whether they would use an implant or a genioplasty for your chin and why. A surgeon who does both and can argue for either has the judgement you want. One who only offers the operation they do is selling that operation.

At the consultation

Ask "what happens if a jaw angle implant gets infected?" You want to hear a plan with a timeline in it, out and back in after a few months. If the answer is that it does not happen to their patients, keep looking.

Frequently asked questions

Should I wait for testosterone to work before surgery?

Most surgeons say yes, at least a year. A lot of people who wanted jaw surgery at six months on testosterone no longer want it at three years. See who it's for.

How long do the implants last?

Indefinitely. Silicone and porous polyethylene do not wear out, and an implant only comes out if it gets infected or you decide you want it gone. See risks.

Will my lip stay numb?

Most people have normal feeling back by three to six months. A small minority keep a patch of numbness on the lower lip. See sensation.

Will there be a visible scar?

No. The incisions are inside the mouth. A chin implant is sometimes placed through a short cut under the chin instead, which hides in the crease and under a beard. See scars.