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Botox Injections for Bruxism (Clenching)

Botox injections are well known for their facial cosmetic benefits as well as the relief of certain medical conditions such as excessive sweating. Botox works primarily by temporarily decreasing or paralyzing the muscles into which it is injected. Because  of the ability to lessen muscle contractions, it is logical to assume that Botox will work for many other medical conditions in which excessive or too strong muscle contractions are the source of pain and dysfunction.

Jaw clenching, also known as bruxism, is a common condition that causes facial pain and excessive wear on one’s teeth.  Typical treatments include night time splints to protect the teeth and medications that attempt to decrease inflammation of the muscle or cause sedation in  attempt to limit the strength of the muscle. Neither approach really addresses the source of the problem….excessive muscle activity and spasticity.

Botox would seem to be a very logical approach to the treatment of bruxism.  It can be injected precisely into the most sore part of the muscle, weakening the most spastic part of the very large masseter muscle without affecting the ability to chew.  Breaking the spasm of a muscle often only requires stopping the origin or focal area of contraction and not the whole  muscle. Even with only partial relief of muscle tension, pain is less and less clenching occurs.

This has been precisely my experience with the treatment of clenching and associated TMJ disorders. The key to a successful outcome is to be able to locate by feel the source of muscle spasm. Usually this is possible as the patient knows where the most sore part of the jaw muscle is. Injections can be done either through the outer skin into the underlying muscle or through the mouth if this is easier to access the medial edge of the masseter muscle or the temporalis muscle attachments. The only area to avoid for injecting is directly into and through the parotid gland area. It usually takes about 25 to 30 units per the affected side as a starting dose. It may eventually take a higher dose to get more complete relief but this starting dose should as least get some relief. If no relief is obtained at this dose, this would suggest that a higher dose is unlikely to be effective either.

Like all Botox injections, it takes about a week to see its effect, so one has to be patient. I have noticed sometimes that the injections may actually cause some discomfort in the first few days due to the needle trauma to the muscle from the injection. For this reason, I like to mix Marcaine, a 24 hour lasting local anesthetic, with Botox to get some immediate relief before the Botox starts to take effect.  

 Dr. Barry Eppley

Indianapolis, Indiana

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Dr. Barry EppleyDr. Barry Eppley

Dr. Barry Eppley is an extensively trained plastic and cosmetic surgeon with more than 20 years of surgical experience. He is both a licensed physician and dentist as well as double board-certified in both Plastic and Reconstructive Surgery and Oral and Maxillofacial Surgery. This training allows him to perform the most complex surgical procedures from cosmetic changes to the face and body to craniofacial surgery. Dr. Eppley has made extensive contributions to plastic surgery starting with the development of several advanced surgical techniques. He is a revered author, lecturer and educator in the field of plastic and cosmetic surgery.

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