Short answer
Masseter Botox is a low-dose botulinum toxin injection into the masseter, the strong chewing muscle of the jaw. Weakening its contraction eases the strain of clenching and grinding on the teeth and gradually slims a square lower face. It takes 5 to 10 minutes and lasts 4 to 6 months. Spec. Dr. Tuba Çelebi Kayhan offers it in Denizli.
At a glance
| Target muscle | Masseter, the chewing muscle just above the angle of the jaw |
|---|---|
| Used for | Teeth clenching, grinding and a muscle-related square lower face |
| Procedure time | 5 to 10 minutes |
| How long it lasts | 4 to 6 months on average; may last longer with repeat treatments |
When you clench your teeth, the muscle that hardens in front of your earlobe, at the lower part of your cheek, is the masseter. In people who clench without noticing during the day or while asleep, this muscle works constantly and thickens, just like a muscle trained at the gym. Jaw pain and a square lower face often share this same source.
Why Does the Masseter Muscle Get Bigger?
The masseter lifts the lower jaw during chewing and presses the teeth together. It is one of the strongest muscles in the face. These habits make it work harder than it should:
- Clenching or grinding the teeth during sleep (bruxism)
- Locking the jaw at stressful moments, at the computer or while driving
- Chewing gum for long periods and preferring hard foods
As the muscle thickens, the area above the angle of the jaw fills out and the face takes on a wider, square shape towards the bottom. In some people this structure also runs in the family.

How Does Botox Ease Teeth Clenching and Grinding?
The signs of clenching are usually clearest in the morning: pain in the jaw and temples, difficulty opening the mouth, worn or sensitive teeth, or a clicking jaw joint. Botox in the masseter reduces the force the muscle can produce. Even if the clenching habit continues, the load on the teeth and the jaw joint falls and morning pain eases.
Botox does not solve the cause of clenching; stress, sleep problems or a faulty bite need to be addressed separately. The way botulinum toxin relaxes a muscle is the same principle here; the difference is that the target is a chewing muscle rather than a muscle of expression.
How Does Masseter Botox Slim the Jawline?
A weakened muscle works less and its bulk shrinks over the following months. As the fullness above the angle of the jaw reduces, the lower face narrows; in women the face moves towards a V shape, while in men only the excess is reduced and the sharpness of the jawline is kept. Because a strong, square jaw is a desired feature in many men, we choose a more measured dose for this face shape. Planning Botox for the male face calls for a separate assessment in this respect.
How Is Masseter Botox Carried Out?
- Examination: we ask you to clench your teeth and feel the borders and thickness of the muscle.
- Marking: the safe injection zone is drawn separately on each side.
- Cleansing: the jaw area is cleaned and disinfected.
- Injection: small doses are placed at several points in the muscle on each side with a fine needle. The procedure takes 5 to 10 minutes.
You can return to your usual routine the same day. For a few hours afterwards we advise you not to press on or massage the area.
How Long Does Masseter Botox Last?
In treatments at our clinic the effect lasts 4 to 6 months on average. With regular repeat treatments the muscle stays slimmer, so the effect may last longer and a smaller dose may be needed. Even so, this change is not permanent; when treatments stop, the muscle gradually returns to its former thickness.
Who Is Masseter Botox Not Recommended For?
- Anyone who is pregnant or breastfeeding
- People with a history of allergy to botulinum toxin
- People with a disorder of muscle and nerve transmission
- People whose lower face is already slim, or whose width comes from bone structure
If fullness below the cheek is caused by fat or sagging, a different method is considered instead of Botox.
What Are the Risks of Masseter Botox?
Brief tenderness and bruising may occur at the injection site. In the first weeks you may feel tiredness when chewing hard foods. Spread of the medicine to nearby muscles is rare; if it happens, a temporary asymmetry may appear when you smile. Because too much slimming can leave a hollow below the cheek, we increase the dose gradually. If you notice any unexpected difficulty swallowing, speaking or breathing, go to the emergency department of the nearest hospital.
Teeth Grinding and Masseter Botox in Denizli: Your Assessment
At the examination we look at the thickness of the muscle, the signs of clenching and the shape of your face together. The plan changes depending on whether your concern is pain alone or appearance alone. At our clinic in Denizli, the treatment is performed by Spec. Dr. Tuba Çelebi Kayhan; you can read about Botox treatment in Denizli or book an appointment by phone.
Frequently asked questions
Will masseter Botox stop my teeth clenching completely?
Will chewing be difficult after jaw Botox?
When will my face look slimmer after masseter Botox?
Can masseter Botox change my smile?
Is a square-looking face always caused by the jaw muscle?
Should I see a dentist before having Botox for teeth grinding in Denizli?
Sources
- Teeth grinding (bruxism) — NHS
- Botulinum toxin — DermNet
This page is for general information only and does not replace an examination, diagnosis or treatment. Please consult your doctor for advice about your own situation.