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Masseter Botox

Name: Masseter Botox
Creator: Dore Medical Editorial Board
Published: 2026-05-11

Botulinum toxin injection reduces excessive masseter muscle activity in teeth grinding and jaw muscle hypertrophy. Muscle relaxation protects your teeth, jaw joint, and dental restorations.

Medically reviewed. Last updated: May 13, 2026.

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What Is Masseter Botox?

Masseter botox is a treatment method in which botulinum toxin (botox) is injected into the masseter muscle — the largest chewing muscle — to reduce its overactivity. It is used for both functional and aesthetic purposes. Botox temporarily reduces the muscle's contraction strength, causing it to thin over time and generate less force. The effect begins within 3-7 days and lasts 6-12 months. When the effect wears off, the treatment can be repeated if needed.

Masseter botox is most commonly used to treat bruxism. In patients with severe teeth grinding, a night guard alone may not be sufficient. Botox reduces the muscle's strength, lowering the pressure caused by grinding. Patients experience significant relief from morning jaw stiffness, headaches, jaw pain, and tooth sensitivity. It is also considered as an additional treatment option for TMJ disorders and jaw joint clicking.

Aesthetic application is also common. The masseter muscle can become overdeveloped due to genetics or long-term bruxism, giving the lower face a square appearance. Botox gradually thins the muscle, creating a more oval and balanced facial contour. The procedure can be performed on both male and female patients. Results are felt within the first few weeks, and visible thinning of the muscle may take 2-3 months.

Before the procedure, an examination is performed, the muscle volume is assessed by palpation, and injection points are marked. The application takes 10-15 minutes, is done with fine-tipped needles, and typically does not require anesthesia. Patients can return to normal activities immediately after treatment. For the first 24 hours, it is recommended to avoid firm massage of the injection area and strenuous exercise. Serious side effects are rare. When the treatment effect wears off, it can be repeated every 6-12 months. With regular application, muscle thinning begins to become more permanent. In cases of severe joint-related symptoms, a TMJ splint may be used in combination. For cost information, you can visit our masseter botox cost calculator page.

Treatment Process

Alternative Treatments

Risks and Complications

Masseter botox is a clinically well-understood procedure that has been applied in dentistry and aesthetic medicine for many years. When performed with proper patient selection, correct dosage, and proper injection technique, it is safe. However, like any medical procedure, there are certain risks and possible side effects that should be known. At Doredent, openly sharing all risks so our patients can make informed decisions is a fundamental principle. Below you can find a transparent overview of the risks that may be encountered with masseter botox application. The vast majority of these risks are temporary and mild.

💉 Temporary Pain and Tenderness at Injection Site

A slight stinging sensation during injection and local tenderness lasting a few hours afterward is normal. This condition usually does not require additional intervention in most patients and resolves quickly.

🟣 Temporary Bruising or Swelling

Mild bruising or swelling may be seen at the injection site. This typically resolves on its own within a few days. The risk of bruising is higher in patients taking blood-thinning medications; therefore, medication use is reviewed before the procedure.

↔️ Asymmetric Effect

In rare cases, the effect of botox may not be equal on both sides; the muscle on one side may relax more or less than the other. This can lead to a feeling of asymmetry during chewing or slight imbalance in facial appearance. It usually resolves on its own as the effect wears off; if necessary, dosage adjustment can be made in the next session.

🍽️ Temporary Chewing Difficulty

In the first few weeks after the botox begins to take effect, temporary difficulty chewing hard foods may be experienced. This is related to muscle relaxation and is an expected effect. In most patients, chewing function returns to normal within a few weeks; the muscle is not completely paralyzed, only the force is reduced.

😊 Smile Asymmetry (Very Rare)

In very rare cases, if botox spreads to adjacent muscles near the masseter, slight asymmetry in the smile may be seen. This is temporary and resolves on its own as the botox effect wears off (usually within a few weeks). Proper injection technique and anatomical knowledge greatly minimize this risk.

🔄 Temporary Nature of Effect

The effect of masseter botox is not permanent; it lasts an average of 4-6 months. As the effect wears off, the muscle regains strength and teeth grinding force may return. For this reason, if symptoms persist, regular repeat sessions are required. However, the positive side is this: if an unwanted side effect occurs, it is also temporary.

💊 Allergic Reaction (Very Rare)

Allergic reactions to botulinum toxin preparations (Allergan Botox) are extremely rare; however, as with any medication administration, a theoretical risk exists. Patients with a known allergy to botulinum toxin must report this.

🦴 Long-Term Muscle Atrophy

With repeated high-dose botox applications over a long period, the masseter muscle may permanently thin and weaken (atrophy). This can lead to significant volume loss in the lower face and reduced chewing force. Proper dosage planning, regular clinical follow-up, and avoiding unnecessary repeat applications minimize this risk.

🤕 Temporary Headache

Some patients may experience a temporary headache in the first 24-48 hours after application. This is usually mild and controlled with simple pain relievers.

Factors That Increase Risk

Blood-thinning medication use: Aspirin, warfarin, and similar medications increase the risk of bruising at the injection site. Medication use is reviewed before the procedure.
Pregnancy and breastfeeding: Masseter botox is not administered during pregnancy or breastfeeding.
Neuromuscular diseases: Botox is not administered in patients with neuromuscular diseases such as myasthenia gravis or Lambert-Eaton syndrome.
Known allergy to botulinum toxin: If an allergic reaction to botulinum toxin has occurred previously, the procedure is not performed.
Active infection: If there is an active infection or skin condition at the injection site, the procedure is postponed.
Unrealistic expectations: Masseter botox does not completely eliminate teeth grinding; it reduces muscle strength. Managing expectations realistically is important for satisfaction.

How Are These Risks Managed at Doredent?

Detailed clinical evaluation: Before the procedure, the masseter muscle volume, bruxism findings, jaw joint condition, and overall health are evaluated by Uzm. Dt. Merve Özkan Akagündüz.
Original preparation: At Doredent, Allergan Botox (onabotulinumtoxinA) is used for masseter botox applications. Original and approved preparation is critical for safety.
Proper injection technique: Anatomical knowledge and identification of correct injection points minimize the risk of spread to adjacent muscles.
Personalized dosage planning: The same dose is not administered to every patient; dosage is determined based on muscle volume, bruxism severity, and patient needs.
Patient education: Before the procedure, expected effects, possible side effects, and post-procedure instructions are clearly explained.
Regular follow-up: After the procedure, efficacy and possible side effects are monitored; dosage adjustments are made in subsequent sessions.

Who Is This Treatment For?

Masseter botox is not automatically applied to every patient who clenches their teeth. It is planned after clinical evaluation for patients in whom masseter muscle hyperactivity requires treatment. Below you can find the patient profiles for whom masseter botox is most commonly applied.

😬 Patients with Severe Bruxism

For patients with severe nighttime teeth clenching and grinding who cannot achieve adequate relief with a night guard or TMJ splint, masseter botox is considered as an additional treatment.

If the night guard wears down quickly, muscle force is very high.
Visible wear, cracks, and fractures on teeth.
Severe jaw fatigue and pain upon waking in the morning.
Masseter botox can be used together with a night guard.

💪 Patients with Masseter Muscle Hypertrophy

In patients whose masseter muscle has enlarged (hypertrophy) due to long-term bruxism, botox provides both functional and aesthetic balance by reducing muscle volume.

Visible muscle mass in the lower face.
Square facial appearance due to muscle enlargement.
Both functional and aesthetic concerns.
Muscle volume gradually decreases with botox.

⚙️ Support for TMJ Disorders

In patients with jaw joint pain and muscle tension, masseter botox can reduce muscle load and relieve pressure on the joint. It can be applied as combination therapy together with a TMJ splint.

Reduces the muscle-related component of jaw joint pain.
Can be used together with a TMJ splint.
Not sufficient alone for every TMJ problem.
May require multidisciplinary evaluation.

🤕 Bruxism-Related Chronic Headaches

In patients who experience temple region headaches upon waking and whose symptoms are thought to be related to masseter muscle hyperactivity, botox can reduce headache frequency by supporting muscle relaxation.

Targets the bruxism component of tension-type headaches.
Bruxism relationship should be confirmed after neurological evaluation.
Can be planned together with a night guard and stress management.
Not suitable for all types of headaches.

💎 Patients Who Want to Protect Their Restorations

In patients with zirconia, veneer, or porcelain crowns who are at risk of severe bruxism, masseter botox helps extend the lifespan of restorations by reducing excessive muscle force.

Reduces the risk of crown fracture and cracking.
Reduces debonding risk in veneers.
Provides double-layered protection with a night guard.
Protects your treatment investment long-term.

👤 Those Seeking Lower Face Slimming for Aesthetic Purposes

In patients with a wide and square appearance in the lower face due to masseter hypertrophy, botox can provide slimming of the facial contour and a more oval appearance by reducing muscle volume.

Muscle-related width in the lower face creates aesthetic concern.
As muscle volume decreases with botox, the facial contour becomes slimmer.
Effect appears gradually (2-4 weeks).
Effect is temporary; repeat sessions are needed to maintain results.

Who Is This Treatment Not Suitable For?

Pregnant and breastfeeding women: Masseter botox is not applied during pregnancy and breastfeeding.
Patients with neuromuscular diseases: Botox is contraindicated in myasthenia gravis, Lambert-Eaton syndrome, and similar neuromuscular conditions.
Those allergic to botulinum toxin: Patients who have previously had an allergic reaction to botulinum toxin.
Those with active infection in the injection area: Application is postponed until the infection resolves.
Patients under 18 years old: Masseter botox is typically applied in adult patients.
Mild bruxism cases: In mild teeth clenching, a night guard is usually sufficient; masseter botox may be unnecessary.

After the Procedure

Masseter botox requires no special recovery period; patients can return to their daily activities immediately. However, following certain guidelines is important to ensure the treatment works effectively and to minimize potential risks.

First 24 Hours

Daily activities: You can return to work and social activities immediately after the procedure. No rest period or time off is necessary.
Do not touch the injection site: Avoid touching, rubbing, or massaging the injection area for the first 4-6 hours. This prevents the botox from spreading to unintended areas.
Do not lie down: Avoid lying down for the first 4 hours after treatment. Staying upright helps keep the botox in the injection site.
Avoid heat exposure: Stay away from saunas, steam rooms, hot showers, and intense physical activity for the first 24 hours. Heat and exercise increase blood circulation, which can cause the botox to spread to unintended areas.
Alcohol consumption: Avoid drinking alcohol for the first 24 hours, as it increases the risk of bruising.

First Week

When the effect begins: Botox does not work immediately. Muscle relaxation typically becomes noticeable within 3-7 days. The full effect appears in 2-4 weeks.
Temporary chewing changes: You may experience mild difficulty chewing hard foods during the first 1-2 weeks. This is normal and resolves as your muscles adapt.
Mild tenderness: You may feel slight tenderness or tightness in the injection area for a few days.
Bruising: If bruising occurs, it typically fades within 3-5 days.

First Month: Full Effect

Muscle relaxation: The full effect of botox appears within 2-4 weeks. Jaw clenching force decreases significantly, and morning jaw fatigue and pain begin to improve.
Aesthetic effect: In patients with masseter hypertrophy, muscle volume gradually decreases. Facial slimming becomes noticeable within 4-6 weeks.
Follow-up appointment: Uzm. Dt. Merve Özkan Akagündüz recommends a follow-up visit 2-4 weeks after treatment. She evaluates the adequacy of the effect, any asymmetry, and patient satisfaction. An additional dose can be administered if needed.

Long-Term Follow-up and Repeat Sessions

Duration of effect: Masseter botox typically lasts 4-6 months. As the effect wears off, the muscle regains strength and jaw clenching force may return.
Repeat sessions: If symptoms continue, repeat sessions are scheduled every 4-6 months. Patients followed by Uzm. Dt. Merve Özkan Akagündüz are evaluated at regular intervals.
Gradual improvement: After the first few sessions, some patients notice longer intervals between treatments. As the muscle gradually weakens (atrophies), bruxism force decreases and the need for repeat sessions may become less frequent. This is a positive long-term effect of masseter botox.
Combined use with night guard: Masseter botox does not replace a night guard or TMJ splint; using them together provides the best results in most cases. Botox reduces muscle force while the night guard directly protects your teeth.
Avoiding unnecessary repetition: Repeat treatment is not performed while the botox is still effective. Muscle condition is reassessed before each session; unnecessary applications are avoided.

Expected Improvements After Treatment

Reduced jaw clenching force: The excessive force produced by the masseter muscle decreases significantly. Pressure on your teeth, restorations, and jaw joint is reduced.
Less morning jaw fatigue and pain: Most patients experience significant reduction in jaw muscle tension and pain upon waking.
Fewer headaches: Tension-type headaches related to bruxism may improve.
Facial slimming (in hypertrophy cases): Patients with masseter hypertrophy experience gradual slimming in the lower face and a more oval appearance.
Extended night guard lifespan: When muscle force decreases, your night guard wears down more slowly and lasts longer.
Protection of restorations: The risk of fracture to zirconia, laminate, and porcelain crowns is reduced.

Important Note for Patients

Masseter botox is not a permanent solution for bruxism on its own; it is a supportive treatment that temporarily reduces excessive muscle activity. Managing bruxism typically requires a multidisciplinary approach: mechanical protection with a night guard or TMJ splint, muscle force management with masseter botox, and when necessary, orthodontic treatment to correct bite alignment. At Doredent, masseter botox is administered by Uzm. Dt. Merve Özkan Akagündüz using Allergan Botox (onabotulinumtoxinA). Before treatment, bruxism severity, jaw joint condition, and muscle findings are thoroughly evaluated. Masseter botox is only recommended when clinically necessary; unnecessary treatment is never performed.

Frequently Asked Questions

What is masseter botox and how does it work?

Masseter botox is a botulinum toxin (Allergan Botox) injection applied to the masseter muscle in the jaw area, which is responsible for chewing function. This procedure temporarily weakens the nerve-muscle connection, reducing the excessive force generated by the muscle. The masseter muscle is one of the strongest muscles in the body and works much more actively in bruxism patients than normal. Due to constant clenching, the muscle grows over time (hypertrophy) and the force it generates increases. This force leads to tooth wear, cracks, fractures, jaw joint problems, and morning jaw pain. Botox reduces this muscle activity in a controlled manner, alleviating these harmful effects. At Doredent, masseter botox is performed by Uzm. Dt. Merve Özkan Akagündüz. The procedure takes approximately 10-15 minutes, does not require local anesthesia, and patients can immediately return to their daily activities.

Is masseter botox painful?

Masseter botox is a much more comfortable procedure than most patients expect. The injections are performed with very fine needles, and only a brief pinching sensation is felt at each injection point for a few seconds. Local anesthesia is usually not necessary. The sensation during injection is described by most patients as "tingling" or "a light pinch." The procedure involves a few injection points on both sides, with a total duration of approximately 10-15 minutes. Mild tenderness may be felt for a few hours after injection; this typically does not require additional intervention. Slight bruising may appear at the injection site; this risk is higher in patients taking blood-thinning medications. Bruising usually resolves on its own within 3-5 days.

How long does the effect of masseter botox last?

The effect of masseter botox lasts an average of 4-6 months. The effect does not begin immediately; muscle relaxation is usually noticeable within 3-7 days, and the full effect appears within 2-4 weeks. As the effect diminishes, the muscle regains strength and teeth-clenching force may gradually return. If symptoms persist, repeat sessions are planned every 4-6 months. After the first few sessions, some patients notice that the need for repeat treatments becomes less frequent. This is because the muscle gradually weakens and shrinks (atrophy) with repeated botox applications. This is a long-term positive effect of masseter botox. The complete reversal of the effect is also a positive safety feature: if an unwanted side effect occurs, it is also temporary and resolves on its own without requiring intervention.

Can masseter botox replace a night guard?

No. Masseter botox and a night guard work through different mechanisms and in most cases complement each other rather than replace one another. A night guard creates a physical barrier between the teeth, preventing clenching force from reaching the teeth directly. It mechanically protects the teeth, restorations, and jaw joint. Masseter botox, however, addresses the source of the problem: it reduces the excessive force generated by the muscle itself. A night guard redirects the force; botox limits the production of force. In severe bruxism cases, the most effective approach is to use both treatments together. While masseter botox reduces muscle force, the night guard directly protects the teeth. This creates a dual-layer protection system. In mild bruxism cases, a night guard alone is usually sufficient; masseter botox may be unnecessary. Which approach is appropriate for you is determined at Doredent after a detailed evaluation.

Will masseter botox change my face shape?

In patients with masseter hypertrophy (excessive muscle growth), yes; it can provide noticeable slimming in the lower face and a more oval appearance. As muscle volume decreases, the angular lower face appearance softens. This change typically becomes noticeable within 4-6 weeks. In patients without masseter hypertrophy who have normal muscle volume, no significant change in face shape is expected. In these cases, the primary effect of botox is functional: it reduces clenching force, relieves morning jaw fatigue, and protects teeth and restorations. Some patients may request masseter botox solely for aesthetic purposes (lower face slimming). At Doredent, masseter botox is always planned primarily with functional evaluation; the aesthetic effect is considered an additional benefit. Realistic expectation management is discussed in detail before the procedure.

How often is masseter botox repeated?

Since the effect of masseter botox lasts an average of 4-6 months, repeat sessions are planned every 4-6 months if symptoms persist. The timing of repeat treatments is determined when the effect begins to diminish, meaning when clenching force is felt again. After the first few sessions, some patients notice that the interval between repeat sessions lengthens. This is because the muscle gradually weakens and shrinks (atrophy) with repeated applications. These patients may need sessions at 6-9 month intervals, or even longer. In some cases, bruxism severity significantly decreases and the need for botox may be eliminated entirely. Before each repeat session, muscle condition is re-evaluated by Uzm. Dt. Merve Özkan Akagündüz. Early repeat treatments are not performed while the effect continues; unnecessary applications are avoided. The need for botox, bruxism severity, and muscle findings are individually assessed at each session.

Treatment Pricing

Pricing

Masseter Botox Pricing

At Doredent, we offer transparent pricing for our international patients. As every case is different, the final treatment cost depends on your individual evaluation.

The cost of Masseter Botox varies based on factors such as the number of units applied and the session frequency. For an accurate quote, a personalized assessment is recommended.

For pricing details, reach out via WhatsApp or book your initial consultation.

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