Chin Augmentation: Implant or Sliding Genioplasty, and What Each One Changes

19 hours ago

6 min read

Quick answer: A short or set-back chin can be lengthened in two ways. A chin implant is a shaped silicone piece placed on the bone through a small incision, usually under the chin or inside the mouth. A sliding genioplasty cuts the lower edge of the chin bone and moves it forward, downward or sideways before fixing it with plates. The implant is simpler and reversible; the genioplasty moves the patient's own bone, can correct height and asymmetry as well as projection, and does not depend on a foreign material. Filler can suggest the change but lasts months, not years.

Key takeaways

The chin decides how the profile reads almost as much as the nose does.
A short chin makes a normal neck look full and a normal nose look large.
An implant adds projection; a genioplasty can change projection, height and midline at once.
Both are usually done under local anaesthesia with sedation, as part of a facial plan.
A chin assessment belongs in every rhinoplasty and every neck consultation.

Why the chin matters more than patients expect

The chin is the front support of the lower face. When it is short or set back, three things follow. The nose looks larger in profile, because the two points that frame the profile are no longer in balance. The angle between the chin and the neck becomes shallow, so the neck reads as full even in a slim patient. And the jawline loses its front anchor, which makes early jowling more visible.

This is why a patient who asks for liposuction under the chin is sometimes better served by lengthening the chin. The relationship between chin position and fullness under the chin is explained in double chin: fat, muscle or gland.

Side profile before and after showing the chin
Deep plane facelift before and after
Deep plane facelift before and after

How a short chin is assessed

The assessment is made in profile with the head level and the teeth together. The surgeon looks at where the chin sits in relation to the lower lip and the rest of the face, at the height of the chin from the lower lip to its lowest point, at the depth of the crease between the lip and the chin, at the bite, and at whether the midline of the chin matches the midline of the face.

Two findings change the plan completely. If the bite is significantly off, the problem may be the jaw rather than the chin, and an orthodontic and surgical opinion is needed. If the chin is not only short but also long or deviated, an implant alone will not correct it.

Option one: a chin implant

A shaped silicone implant is placed directly on the bone through a short incision, most often hidden under the chin. The implant is sized during the operation and secured so that it cannot move.

It suits a patient whose chin is short in projection only, whose bite is normal and whose chin height and midline are satisfactory.

Its advantages are a shorter operation, a quicker recovery and the fact that it can be removed or exchanged.

Its limits are that it adds projection only, that a foreign material is placed on bone, and that over many years the bone beneath an implant can remodel.

Option two: sliding genioplasty

The lower part of the chin bone is cut and moved into the planned position, then fixed with small titanium plates and screws. The bone heals as one piece.

It suits a patient who needs more than projection: height reduction or increase, correction of a deviated midline, or a large advancement.

Its advantages are that it uses the patient's own bone, that it can change three dimensions at once, and that there is no implant to maintain.

Its limits are a slightly longer operation, temporary numbness of the lower lip in some patients, and the fact that it is not reversible in the way an implant is.

Option three: filler

Filler placed on the chin can add a few millimetres of projection and is useful to show a patient what a change would look like. It lasts months, it cannot lengthen a short chin vertically, and repeated large volumes in this area migrate. It is a test, not a treatment.

Chin and nose together

Changing the nose changes how the chin reads, and the reverse is also true. A patient who asks only for a smaller nose sometimes needs a slightly longer chin instead, or as well. Planning the two together is what is meant by profile surgery; it is described in profiloplasty: what profile aesthetics means. Prof. Dr. Suleyman Tas performs closed atraumatic rhinoplasty and assesses the chin as part of every nasal consultation.

Chin and the neck

Lengthening a short chin deepens the angle between the chin and the neck and tightens the soft tissue under it. In a younger patient this alone can change the profile. In an older patient whose neck has also lost support, the chin is combined with a neck lift; the two together give a result neither achieves alone. See deep plane neck lift and jawline definition.

Recovery

Both operations are usually performed under local anaesthesia with sedation. Swelling peaks on the second or third day and most of it settles within two to three weeks, although the final shape of the chin becomes clear over two to three months. A supportive tape is worn for the first days. Soft food is advised for about a week when the incision is inside the mouth. Office work is usually possible after about one week.

Risks worth knowing

Temporary numbness of the lower lip and chin, which recovers in most patients over weeks to months
Asymmetry, which is why the midline is marked before surgery and checked during it
Implant movement or infection, which is uncommon but is the main reason an implant may need to be removed
Over-projection, which looks harder to correct than under-projection and is why a conservative plan is preferred

How to judge before and after photographs

Look only at profile views taken with the head level and the teeth together.
Check the relationship between the lower lip and the chin, not the chin alone.
Look at the angle under the chin, which should be deeper rather than simply emptier.
Check the midline from the front.
Ask how long after surgery the photograph was taken; chin swelling settles slowly.

Frequently Asked Questions

Is a chin implant or a sliding genioplasty better?

Neither is better in general. An implant suits a chin that is short in projection only. A sliding genioplasty suits a chin that also needs its height, midline or a large advancement corrected.

Is a chin implant permanent?

It is designed to stay, but it can be removed or exchanged, which is one of its advantages. Over many years the bone under an implant can remodel slightly.

Does chin surgery change my neck?

Yes. Lengthening a short chin deepens the angle between the chin and the neck and tightens the tissue under it, which is why some patients who ask for chin liposuction need chin lengthening instead.

Will my lower lip be numb afterwards?

Temporary numbness of the lower lip and chin is common after a sliding genioplasty and recovers in most patients over weeks to months. It is less common after an implant.

Can filler replace chin surgery?

Filler can add a few millimetres and is useful to preview a change. It lasts months, cannot correct a vertically short chin, and large repeated volumes migrate.

Can chin surgery be combined with rhinoplasty?

Yes, and it often should be, because the nose and the chin frame the same profile. The two are planned together.

About the Author

This article was written and medically reviewed by Prof. Dr. Suleyman Tas, a plastic, reconstructive and aesthetic surgeon in Istanbul with over 20 years of experience. He is the author of Rhinoplasty in Practice (CRC Press, 2020), has more than 40 peer-reviewed scientific publications and five patents, and teaches facelift and rhinoplasty techniques to surgeons at international courses. Read more about Prof. Dr. Suleyman Tas.

Individual results vary. Before and after photos and videos are shared with patient consent. This article is for general information and does not replace a personal medical consultation.

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