Clenching and Grinding of Teeth (Bruxism)

Bruxism is the culprit leading not only to destruction of natural teeth, but also leading to the early demise of many restorations. Diagnosis and treatment are made more complex given that awake and sleep bruxism involve different process.

Our Jaws are simple but complex things, when we get pain in our jaw it can feel like we have pain in our head, neck and shoulders. Pain in our jaws can be caused by several things but a very commonly occurring reason is clenching and grinding of our teeth. When we clench and grind, we overuse our jaw muscles and often use them in a way that isn't their ‘ordinary’ movement of function. A large indicator of this is wear and damage to our teeth.


Broome Dental Clinics clinicians are trained to detect this and we have several ways we can help to treat and prevent damage and pain from clenching and grinding.

A common treatment method is to make a splint, a clear fitted plastic guard worn while sleeping at night time.

Another treatment that can be combined with a night guard, is Muscle Relaxer Injection into the chewing muscles to reduce their strength and impact. Consultation is necessary to determine patients' eligibility.

How does Muscle Relaxer Treatment work for clenching and grinding?

Injecting small doses of Muscle Relaxer directly into the masseter muscle (the jaw), weakens the muscle enough to stop habitual grinding of the teeth and clenching of the jaw. This significantly relaxes the muscle and reduces the wear and tear on the teeth due to bruxism (the action of clenching or grinding).

Muscle Relaxer is a natural toxin, which weakens the masseter muscles when injected in very small amounts. It is safe to use when injected by an experienced practitioner.

Are there any side effects of using Muscle Relaxer Injections for Jaw clenching (bruxism)?

Muscle Relaxer injections in the masseter for clenching and grinding teeth do not have many side effects and the only immediate side effect reported is a slightly “lopsided smile” in around 8% of patients who returned to normal after a few weeks. In some very rare cases (less than 1%), you may experience fatigue that lasts only a couple of days.

How long does it take for Masseter/Jaw Muscle Relaxer to start taking effect?

The treatment works in around 10 to 14 days. If you are new to this treatment, we may sometimes ask to see you for a review after 2 to 4 weeks. This is to make sure the dose given is optimal and the treatment is working. There is no charge for the review. We may ask for an additional charge to cover the product fee if we need to use additional Muscle Relaxer injections.

For consultation and additional information about what treatments are best for you. Please contact us at (08) 9192 1624 or email us at to book an appointment.