Bruxism – Botox for the jaw muscles
Botulinum toxin treatment for bruxism refers to a procedure in which excessive activity of the masticatory muscles (masseter and temporalis) is reduced. Botulinum toxin acts at the neuromuscular junction and weakens muscle activation, thereby reducing the load on the muscles.
In some cases, this treatment can be used to supplement the primary treatment for bruxism, namely a bite splint.
Botulinum toxin treatment for bruxism at a glance:
- Botox treatment reduces overactivity of the masticatory muscles at the neuromuscular junction
- This treatment can be used as part of a comprehensive treatment plan for bruxism
- Does not replace a bite splint
- Does not affect the underlying causes of bruxism, such as stress or bite issues.
- The effects usually last 3–6 months
- The need for treatment is assessed on a case-by-case basis
Bruxism, or teeth grinding and clenching, can place significant strain on the masticatory muscles. As a result, these muscles may enlarge and become more active.
In some cases, botulinum toxin (Botox) can be used to reduce this muscle activity. The goal of treatment is not to eliminate bruxism entirely, but to reduce muscle strain and the associated symptoms.
The suitability of treatment is always assessed on an individual basis during the consultation.
How does botulinum toxin affect the masticatory muscles in bruxism?
Bruxism, or teeth grinding, places particular strain on the masseter muscle. In cases of chronic bruxism, muscle activity can increase significantly.
Botulinum toxin treatment reduces muscle activity in a controlled manner, which can relieve tension in the masticatory muscles and reduce the strain on the jaws.
The treatment does not eliminate the cause of bruxism but affects muscle activity.
Botox treatment for bruxism – when is it used?
Teeth grinding, jaw clenching, and tension in the chewing muscles can affect our daily lives more than many of us realize. Most often, bruxism affects people at night, but some of us grind our teeth even when we’re awake. Nighttime grinding often goes unnoticed and undiagnosed, whereas daytime bruxism is much easier to detect.
If left untreated for a long time, bruxism can cause facial pain, persistent, vague headaches, daytime fatigue, and tooth wear.
Botulinum toxin treatment—more commonly known as Botox—can, in some cases, be an effective and safe way to relieve symptoms caused by bruxism. In this context, however, it is important to remember that treatment for bruxism usually begins with a mouthguard.
When treating occlusal problems, the first line of treatment is usually a bite splint. In some cases, botulinum toxin treatment may be used as an adjunctive therapy if overactivity of the masticatory muscles causes significant symptoms.
Source: Current Care Guideline: Bruxism
Botox treatment can complement the effectiveness of a mouthguard by reducing the activity of the jaw muscles and alleviating the intensity of teeth grinding. Together, a mouthguard and Botox can form an effective comprehensive treatment:
- A bite guard protects teeth from wear.
- Botox can reduce teeth grinding.
I perform botulinum toxin treatments for bruxism every day at all of my clinics. In addition, I train doctors and dentists in the use of botulinum toxin to treat bite problems. I am currently working on my doctoral dissertation, which focuses, among other things, on botulinum toxin treatments for the masticatory muscles.
What is bruxism (teeth grinding)?
Bruxism refers to involuntary and repetitive clenching and grinding movements that occur either during sleep (nocturnal bruxism) or while awake (waking bruxism). Both nocturnal and waking bruxism can cause similar unpleasant symptoms. However, many people are unaware that they suffer from bruxism until they notice the consequences of grinding.
Bruxism is associated with increased activity in the masticatory muscles, which can be influenced by factors such as stress, occlusal factors, and central nervous system regulation.
Bruxism is often caused by stress, sleep issues, and nervous system regulation.
👉 Read more: Causes of bruxism
Temporomandibular disorders (TMD) are the most common cause of pain in the mouth and face after toothache. According to estimates, up to about half of the population experiences symptoms of temporomandibular disorders from time to time, and about 10% suffer from significant symptoms. (Source: research literature on temporomandibular disorders)
Sometimes nocturnal bruxism is only diagnosed during a dental checkup,
when the dentist notices damage to the teeth caused by grinding.
The symptoms of bruxism can range from mild jaw stiffness to severe pain in the jaw muscles and recurring headaches. In cases of prolonged bruxism, teeth grinding can wear down tooth enamel and put strain on the jaw joints.
- jaw muscle pain
- headache
- jaw stiffness
- tooth wear
👉 Read more: Symptoms of bruxism
Symptoms of bruxism – what are the signs of bruxism?
Typical symptoms of bruxism include
- headaches, especially in the morning
- pain in the face and temples
- jaw tension or tenderness
- jaw clicking, grinding, and other noises
- tooth wear or chipping
- in some cases, changes in the shape of the lower face (enlargement of the masseter muscle)
In cases of chronic bruxism, the strain can extend beyond the jaws and masticatory muscles to the neck and shoulder area. In such cases, the symptoms may become more complex and prolonged.
Severe bruxism (severe teeth grinding)
Sometimes bruxism can be particularly severe and cause significant damage to the teeth and the structures of the temporomandibular joint.
In some cases, botulinum toxin treatment (Botox) can help by reducing the strength of the jaw muscles and alleviating many of the symptoms associated with bruxism.
Botox treatment is almost always combined with a bite guard. In this combination therapy, the bite guard protects the teeth, and Botox can reduce teeth grinding.
How does botulinum toxin affect the masticatory muscles in bruxism?
In the treatment of bruxism, botulinum toxin is often injected into the masseter muscle at the corner of the mouth, among other areas. For this reason, the treatment is sometimes also referred to as " masseter Botox."
The masticatory muscles play a major role in chewing and closing the jaw. In cases of prolonged bruxism, muscle activity may increase and the muscles may become enlarged.
Bruxism puts strain on the masticatory muscles (the masseter muscles at the corners of the mouth and the temporalis muscles at the temples). Constant clenching and tension can cause pain in the facial area, headaches, and many other ailments. Frequent grinding may eventually become visible to others as well.
When the chewing muscles are constantly being exercised, they grow just like any other muscles. A dentist can spot a severe bruxist just by seeing the patient’s face as they walk through the door of the examination room. Well-developed masseter muscles make the lower face wider and more robust than normal.
At the very least, just by looking inside the mouth, a dentist can make the correct diagnosis, since the effects of teeth grinding are visible on the teeth, the tongue, and even the inner surfaces of the cheeks.
Can botulinum toxin reduce overuse of the masticatory muscles?
In some cases, botulinum toxin treatment (Botox) can safely and effectively reduce the overactivity of the jaw muscles. Botulinum toxin relaxes the muscles, which can reduce biting force and alleviate symptoms. However, the treatment does not completely paralyze the jaw. Eating, speaking, and other functions remain normal.
Botulinum toxin treatment for bruxism is not the only medical use for botulinum toxin. Botulinum toxin is also used to treat migraines, excessive sweating, and various neurological conditions. In the treatment of bruxism, small, precisely targeted doses are used. In some cases, the muscles of the base of the skull and the neck and shoulder area may also be treated.
The Use of Botulinum Toxin Treatment for Bruxism
Botulinum toxin treatment for bruxism is always tailored to each individual based on facial muscle function and the patient’s symptoms.
Botulinum toxin treatment for the masticatory muscles is used particularly in cases where bruxism—or teeth grinding—causes pain, muscle tension, or strain in the jaw area.
This treatment is not suitable for everyone, and the need for it is always assessed during the consultation.
How does botulinum toxin treatment work for bruxism?
Botulinum toxin treatment for bruxism is a quick yet carefully planned procedure in which safety and individualized assessment play a central role. The typical treatment process proceeds as follows:
- Assessment. The patient’s condition and symptoms are assessed. The function of the masticatory muscles is examined, and the size and activity of the masseter muscles are evaluated. The condition of the teeth is also taken into account.
- Treatment decision. If Botox treatment is the appropriate solution, the injection sites are carefully planned.
- Procedure. Botulinum toxin is injected in small, targeted doses primarily into the chewing muscles: the masseter and temporalis muscles. The treatment usually takes only a few minutes.
- Follow-up. Post-treatment instructions will be reviewed, and a follow-up visit can be scheduled if necessary.
This treatment is not the first choice for everyone; rather, it is used judiciously as part of a comprehensive treatment plan for bruxism.
The effects of the treatment usually begin within a few days and peak after about two weeks. The effects of the treatment typically last for about 3 to 6 months.
In addition to bite splints and Botox, comprehensive treatment may also include massage of the masticatory muscles or self-guided stretching and relaxation exercises.
The mechanism of action of botulinum toxin in bruxism
The effect of botulinum toxin is based on the temporary blocking of nerve-muscle transmission. When the muscle does not receive contraction signals as strongly as before, muscle activity decreases and the muscle is able to relax. This mechanism explains why botulinum toxin treatment can alleviate the overuse of the masticatory muscles and muscle pain associated with bruxism.
Botox does not address the underlying causes of bruxism, but rather affects muscle activity.
In chronic bruxism, the masticatory muscles are easily overloaded. This constant state of tension can affect other parts of the body as well—even the entire body—although symptoms are usually concentrated in the head area.
Constant teeth grinding can lead to hypertrophy (enlargement) of the masseter muscles. This is evident in the prominence of the jawline and a widening of the lower facial contour.
Botox relaxes the jaw muscles
Botox treatment affects nerve transmission in the muscles, resulting in a controlled relaxation of the masticatory muscles that is both visible and noticeable. In some cases, it has been reported that this muscle relaxation may continue to affect the function of the masticatory muscles even after treatment, but the response varies from person to person.
Botox does not address the underlying causes of bruxism; rather, it affects muscle activity.
In most cases, maintaining treatment results requires follow-up treatments, for example, 2–3 times a year.
Botox treatment affects nerve transmission in the jaw muscles and can reduce excessive muscle activity. In cases of bruxism, treatment is usually targeted at masseter– and temporal-into the muscles, which can relieve tension in the masticatory muscles and reduce the strain caused by teeth grinding.
Excessive activity of the masticatory muscles is one of the key mechanisms underlying bruxism. When botulinum toxin reduces neuromuscular activation, the muscle’s contractile force is temporarily weakened, allowing the muscle to relax.
This can relieve pain in the jaw muscles and reduce the strain caused by teeth grinding.
Botulinum toxin treatment for bruxism – what does the research evidence say?
Botulinum toxin has also been studied for the treatment of masticatory muscle pain and temporomandibular disorders (TMD). In several clinical studies, botulinum toxin treatment has been found to reduce masticatory muscle pain and muscle hyperactivity.
- In a clinical trial involving 149 patients, pain levels decreased on average from 8/10 to 3/10 on the VAS pain scale during a six-week follow-up period.
- Some studies have reported that botulinum toxin treatment also reduces the frequency of headaches and tenderness in the masticatory muscles.
However, the research evidence is somewhat mixed, and the response to botulinum toxin treatment can vary from person to person.
I participated in a study that examined the effects of botulinum toxin treatment on masticatory muscle-related temporomandibular disorders. The study was published in the peer-reviewed Journal of Craniofacial Surgery and is available in the PubMed database:
Temporomandibular Disorders and Masticatory Muscle Dysfunction – Research Article
It is worth noting, however, that according to current treatment guidelines, botulinum toxin therapy is not considered the primary treatment for disorders of the masticatory system. Treatment is typically based on a bite splint and other conservative treatments, which may be supplemented with botulinum toxin therapy if necessary.
Temporomandibular disorders (TMD) are the most common cause of pain in the mouth and face after toothache. It is estimated that up to about half of the population experiences symptoms of TMD from time to time, and about 10% suffer from significant symptoms.
The content of this article is based on clinical experience and educational materials on botulinum toxin treatments used in the training of physicians and dentists.
Patient experiences with botulinum toxin treatment for bruxism
- Many patients report feeling more relaxed after botulinum toxin treatment: headaches may decrease, jaw muscle tenderness may ease, and sleep quality may improve. Read about Matilda’s experience.
- Some patients also notice aesthetic changes: as the masticatory muscles relax, they may shrink in size and the shape of the lower face may change subtly.
- Based on clinical experience, botulinum toxin treatment can be a significant help for some patients in managing the symptoms of bruxism.
Genuine customer reviews*
* Individual experiences may vary. Not all patients will experience the same benefits from treatment.
“Botox injections have been a huge help to me. The symptoms caused by bruxism have decreased significantly.”
– Patient Feedback, Helsinki 2024
Patient experiences may vary, and treatment outcomes are not the same for everyone.
Can the jaw muscles shrink after Botox treatment?
Yes, the masticatory muscles can shrink as a result of botulinum toxin treatment if the load on them decreases and muscle activity declines.
Changes in muscle size occur because a muscle that has been in constant use loses some of its load and may, over time, atrophy slightly.
The effects of Botox treatment can be seen in the facial area. The result is not—nor is it intended to be—merely aesthetic. For many people, the greatest relief comes from the reduction of constant tension, stiffness, and pain in their daily lives.
Early treatment of bruxism can reduce tooth wear and other changes caused by excessive stress on the masticatory system. Treatment primarily involves the use of a bite splint, and in some cases, botulinum toxin therapy may be used as a complementary measure.
The masticatory muscles may shrink as a result of botulinum toxin treatment if the load on them and their muscle activity decrease.
As activity in the masseter muscle decreases, the constant strain on the muscle is relieved, and over time the muscle may shrink slightly (atrophy).
For this reason, some patients also notice that the shape of their lower face becomes subtly narrower after treatment.
Botulinum toxin treatment can reduce excessive activity in the masticatory muscles and the associated strain in bruxism.
The masseter muscle is one of the strongest muscles in the face and is involved in closing the teeth together. In bruxism, the muscle’s constant activation can increase tension and strain on the masticatory muscles.
Botox treatment can temporarily reduce muscle activity at the neuromuscular junction, which may help alleviate symptoms associated with overuse of the masticatory muscles.
An Oral and Maxillofacial Surgeon's Perspective on the Treatment of Teeth Grinding
In some cases, botulinum toxin treatment can be used to support the treatment of teeth grinding, and it is generally a well-tolerated procedure. However, successful treatment requires medical expertise, knowledge of facial anatomy, and experience with botulinum toxin treatments.
The masticatory muscles are located near other facial muscles whose function may be affected by botulinum toxin if the injection is administered in a suboptimal location. In such cases, the treatment outcome may be incomplete, and effects may also be observed in the appearance or function of the face.
However, it is important to remember that botulinum toxin treatment is generally considered a safe procedure. Serious complications are rare, and any cosmetic changes, such as facial asymmetry, are typically temporary and last only a few months.
Botox treatment is not the first-line solution for everyone; rather, it is used judiciously as part of a comprehensive treatment plan for bruxism.
Aesthetic changes in the facial area are often noticeable. Therefore, planning and administering botulinum toxin treatments require a solid understanding of anatomy and experience with facial muscle function.
What is known about botulinum toxin treatment for bruxism?
- Botulinum toxin reduces muscle activity at the neuromuscular junction
- Some studies have found that pain symptoms are alleviated
- This treatment is not the primary form of treatment
- The response varies from person to person
Bruxism: Botox injections for the jaw muscles – frequently asked questions
Here are answers to the most common questions about botulinum toxin treatment for bruxism.
Does Botox treatment hurt?
The injection usually feels like a slight pinch on the skin, but the actual pain is usually mild and short-lived. The procedure takes only a few minutes, and anesthesia is generally not needed. If necessary, an anesthetic cream can be used.
When do the effects of Botox treatment begin?
The effects of botulinum toxin (Botox) treatment are not immediate. Botulinum toxin blocks the release of acetylcholine at the neuromuscular junction, causing muscle contraction to gradually weaken.
You may notice the first changes within a few days, and the full effect usually develops over the course of 1–2 weeks.
How long does Botox affect the jaw muscles?
The effects of Botox treatment usually last about 3–6 months. The duration varies from person to person. In some cases, muscle activity may decrease over the long term as a result of the treatments.
Can Botox treatment replace a mouthguard?
No. A bite guard is the primary treatment for bruxism and protects the teeth from wear. Botulinum toxin treatment can complement this therapy by reducing overuse and muscle activity in the jaw muscles.
Is Botox treatment safe?
Botox treatments are generally considered safe when performed by a trained doctor or dentist. However, the treatment is not suitable for everyone.
The most common side effects are mild and temporary. If the injection is administered in a suboptimal location, effects may be observed in facial muscle function or facial expressions, but these are typically temporary.
Why is the treatment of bruxism the responsibility of a dentist?
Bruxism, or teeth grinding, is related to the functioning of the mouth and masticatory system. The dentist evaluates the condition of the teeth, bite, and masticatory muscles as a whole.
Because bruxism can cause tooth wear and other changes in the oral cavity, treatment primarily involves the use of a bite splint and other conservative methods. In some cases, botulinum toxin treatment can complement this approach.
Patient experience with botulinum toxin treatment for bruxism
The following video describes a patient's experience with botulinum toxin treatment for bruxism.
Bruxism, or teeth grinding and clenching, caused headaches, among other symptoms. According to the patient, the effects of the botulinum toxin treatment began within a few days: muscle tension eased, grinding decreased, and associated symptoms improved.
The treatment was also found to have aesthetic effects, such as subtle changes in the lower face.
Individual responses vary, and the treatment does not work the same way for everyone.
In this video, a patient shares their experience with botulinum toxin treatment for bruxism. Botulinum toxin treatment can reduce excessive activity in the jaw muscles—particularly the masseter muscle—and alleviate symptoms associated with teeth grinding.
Where are botulinum toxin treatments performed for bruxism?
Botulinum toxin treatment is used to treat bruxism in many healthcare facilities. The treatment is based on an assessment of the function of the masticatory muscles and an individualized treatment plan.
The safety and outcome of the treatment depend in particular on the practitioner’s experience, knowledge of anatomy, and injection technique.
Treatment for bruxism – what can you expect from the process?
Bruxism, or teeth grinding, can cause a variety of symptoms, such as facial pain, headaches, tooth wear, and temporomandibular joint disorders.
In some cases, Botox treatment can be used to alleviate excessive activity in the jaw muscles. However, the most common treatment involves a mouthguard, which protects the teeth and reduces the load on them.
Together, these treatment methods can help manage bruxism and reduce its associated symptoms. The response to treatment varies from person to person, and bruxism cannot always be completely eliminated.
How does Botox treatment help with bruxism?
Botox treatment helps with bruxism by reducing excessive activity in the jaw muscles at the neuromuscular junction.
Botulinum toxin treatments are used, among other things,
- in the treatment of migraines
- for the treatment of excessive sweating
- in the treatment of bruxism
Botulinum toxin treatments for migraine and bruxism share some of the same principles and injection sites. Although the mechanisms of action are not exactly the same, there are significant similarities in their practical application.
Does Botox treatment help with bruxism?
Botox treatment can help with bruxism by reducing excessive activity in the jaw muscles. However, it is not the first-line treatment.
Bruxism, or teeth grinding, puts strain on the jaw muscles and can cause headaches, facial pain, and tooth wear. Treatment typically involves the use of a mouthguard, but in some cases, it may be supplemented with Botox injections.
The response to treatment varies from person to person, and botulinum toxin treatment does not eliminate bruxism in all patients.
