Chin enhancement

The usual complaint is that the lower third of the face does not hold its own against the rest of the profile. A chin that sits back makes the nose look larger than it is, shortens the jawline, and can give the neck the impression of more volume than it actually carries. A chin that sits too far forward, or that is too wide or too long, does the opposite: it dominates the lower face and can make an otherwise well-proportioned nose look small.

In our practice the conversation is about balance rather than about making the chin larger or smaller as an isolated project. Moderate, well-directed change in the chin often does more for the face than a striking change in one neighbouring feature. That is why chin work so often sits next to rhinoplasty, next to an anterior neck lift, or inside a broader facial-sculpting plan, rather than as a procedure considered only on its own.

The development of the lower jaw can be associated with significant problems of the dental occlusion — the way the upper and lower teeth meet. When that relationship is wrong, the right operation is not a chin implant or a limited genioplasty. Surgery to align the upper and lower jaws more accurately is carried out by maxillofacial surgeons, usually after orthodontic preparation, and it can take a long time to plan.

When the relationship between the upper and lower teeth is relatively good, but the chin projection is deficient or excessive, the appearance of the chin can be dealt with on its own. That is the situation this page describes. The distinction matters, because treating a bite problem as if it were only a contour problem leaves both the occlusion and the face unfinished.

It is possible either to build, using an implant or a genioplasty, or to reduce, again directly or through a genioplasty.

Dermal fillers can increase projection for a period. They are useful when someone wants to test a change, or when the deficiency is modest and a temporary result is acceptable. They do not change the bone, they do not last, and they are a poor substitute when the deficiency is in width as well as in projection, or when the plan is a lasting alteration of the lower-face proportions.

An implant increases projection and can also change width and height, depending on the shape chosen and on how that shape is adjusted. The types of implant that can be used are silicone or Medpor. In our practice the Medpor implant is the one normally used. It can be shaped at the time of surgery for a more customised set of features, both in width and in projection, rather than relying only on a stock form.

The implant sits on the bone. The tissues of the chin are lifted, the implant is placed, adjusted, and fixed — in our practice typically with titanium screws — and the tissues are closed over it. That sequence is what allows the change to be stable rather than floating in the soft tissue.

Genioplasty reshapes the mandible at the chin point. For enhancement it can advance the chin and adjust height by moving a segment of bone and fixing it in a new position — a sliding genioplasty. For reduction it can set the same segment back, or shorten it, depending on what the contour needs. It is the operation we turn to when the change required is not well served by an implant: a vertical adjustment, a reduction, or a movement that an onlay implant cannot produce cleanly.

If the genioplasty is only for augmentation without a specific vertical change, an implant is often the more direct way to expand the chin in more than one direction. That is a planning decision, not a hierarchy of techniques.

Reduction can also be carried out by working the surface of the bone — shaving or burring it down — rather than by moving a segment. Ultrasonic instruments allow more precise work around the mandible and more control of the detail of the contour than older manual tools. Direct reduction is useful when the excess is in the surface shape rather than in the position of the chin point. Genioplasty is the better tool when the whole point of the chin needs to move.

The procedure for either an implant or a reduction of the chin is carried out from inside the mouth. A chin implant can also be inserted through an incision under the chin.

In our practice, the access under the chin is used when there is also a neck-lift intervention, and it is shared between the two procedures. That avoids a second incision when the same sitting already needs a short cut under the chin for the neck. When the chin is treated on its own, the intra-oral route leaves no skin scar on the chin itself.

Planning is generally carried out well using 3D imaging and computer simulations. That allows accurate analysis of a variety of angles and of the impact of different projection and width for the chin — not only the familiar side-view line, but the front view and the obliques, where width shows itself.

Simulations are a planning tool. They are not a photograph of the result. The computer can show the direction and the scale of a proposed change; it cannot show healing, the way the soft tissue will drape, or the small differences that appear once swelling has gone. We treat the images as a way of agreeing what we are trying to do, not as a guarantee of an identical outcome.

For the balance of the facial contours, and in particular for reduction in chin projection, a cone beam CT scan is critical. It shows the bone that will actually be reduced, the tooth roots, and the course of the mental nerves. For enhancement of chin projection it can be useful, but it is not as critical, because the work is additive on the surface of the bone rather than subtractive through it.

Chin adjustments are considered in relation to the proportions of the lips, the neck, the forehead and the nose. They can be carried out on their own or in combination with other profile work.

With rhinoplasty, a chin that sits back is one of the common reasons a nose looks larger than the reduction it actually needs. Building the chin a modest amount can spare the nose an over-reduction, and the two operations are often planned together for that reason.

With the neck, a slightly small chin and a full upper neck often travel together. An anterior neck lift reduces volume under the chin when skin laxity and platysma bands are not the problem; a chin implant or genioplasty changes the bone that the jawline is read against. They are different operations. They can share the under-chin incision when both are indicated. Neither replaces the other.

Facial sculpting more generally — cheek implants, buccal fat reduction, fat transfer, jaw-angle implants — follows the same principle: moderate change in more than one area is usually more coherent than a single large change in the chin.

The operation is usually carried out under general anaesthetic and is typically a day-case intervention. It lasts approximately one hour when the chin is treated on its own. Combined work with a neck lift or a rhinoplasty takes longer, because those operations have their own time.

After the access is made, the work is either placement and fixation of a shaped implant, movement and fixation of a bone segment, or reduction of the bone surface — whichever the plan requires. Absorbable stitches are used inside the mouth. If the under-chin incision is used, that skin is closed in the usual way.

A consultation for chin enhancement is an examination of the lower face in three dimensions, not a conversation about a catalogue implant. We need a medical history and a full list of medicines. Blood thinners raise the risk of bleeding and have to be managed around the operation. Raised blood pressure does the same. Both need to be known and planned for.

We also need to know about previous facial surgery, dental work, and any history of numbness in the lip or chin. The occlusion is checked. If the bite is the real problem, the honest next step is a maxillofacial opinion rather than a chin implant.

3D capture and, where reduction is being considered, a cone beam CT sit inside that same visit or shortly after it. Fees are confirmed in writing once there is a plan — implant, genioplasty, reduction, and whether anything else is being done in the same sitting. A figure offered before that plan exists is rarely a useful one.

Swelling in the chin and the lower lip is expected for the first week to ten days. An elastic chin–neck garment helps it settle and is usually worn in the early period after surgery. Sleeping with the head up is more comfortable than lying flat.

If the incision is inside the mouth, a soft diet for the first week protects the suture line. Chewing against fresh intra-oral stitches is one of the ways that line can break down. Teeth are cleaned with a soft toothbrush; an antiseptic mouthwash is used several times a day. Hot drinks are unwise while the lip is numb, because it is easy to burn a lip you cannot feel.

Most people plan around one to two weeks away from an office-facing role, so that bruising has a chance to fade and the chin has begun to settle. Exercise that raises blood pressure is left for about three weeks. The face continues to refine for several weeks after that; a working assumption of around six weeks to a more settled contour is realistic, with subtler change after that as residual swelling leaves.

All surgery carries risk. For chin enhancement the ones that need to be understood before the day, not after it, are these.

Bleeding and bruising are expected to a degree. A collection of blood under the tissues is uncommon but would need to be dealt with. Infection is a particular concern when an implant has been placed through the mouth. If the intra-oral line breaks down and the implant is involved, the implant may have to come out and the reconstruction postponed for some months. That is why the first week’s diet and mouth care are not optional details.

The mental nerves, which supply feeling to the lower lip and the chin, run through this field. Temporary numbness of the lip is not rare in the early weeks. Lasting numbness is uncommon, but it is a recognised risk of both implant surgery and genioplasty, and of reduction that comes close to the nerve canals — which is one reason a cone beam CT matters when bone is being reduced.

Asymmetry, under-correction and over-correction are possible. The 3D plan reduces the chance of a surprise in direction or scale; it does not eliminate variation in how tissues heal. Implants can shift if they are not fixed; that is why they are screwed to the bone in our practice. Medpor incorporates into the surrounding tissue over time, which is an advantage for stability and a consideration if a later removal is ever required.

Revision is sometimes needed. It is better treated as a possibility than as a failure of the original plan.