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Masster Muscle Reduction with Botox Injections

Botox, the world’s most popular injectable cosmetic treatment, works by providing a temporary muscle paralyzing effect reducing or eliminating unwanted facial expressions. The vast majority of Botox used for this purpose is done in the forehead and around the eyes. In the masseter muscle, however, repeated Botox injections over time can actually reduce the size of this large muscle improving external appearance and reducing muscle-clenching pain symptoms.
The use of Botox for masseter muscle reduction is well chronicled in the Korean medical journals. In this ethnic group, it is often desired to reduce the size of the muscles for the cosmetic purpose of making the face look less square. Botox done over time is so effective that the surgery historically used to achieve the same effect, masseter muscle reduction and mandibular angle reduction, is now reserved only for patients that demonstrate an actual bony prominence as the primary source of the problem.
Botox injections in the masseter muscle are easy to do. Have the patient clench their teeth together and the prominent bulging of the masseter muscle borders are easily seen. I usually inject right into the prominent bulging areas with 6 units per bulged area and stay closer to the angle areas of the jaw and its lower border to avoid injecting into the parotid gland. Plus, the thickest bulk of the masseter muscle lies low anyway. I have found that it takes about 25 – 35 units per side to get a good effect. So when I run out of bulging areas to inject, I will make sure I inject at the front and back of the muscle at the bottom of the jaw until I reach that number of units.
While effects can be usually been fairly quick, as judged by less muscle pain and headaches, it takes about 6 months before actual visible shrinking of the muscle is seen. Botox injections should be repeated every 4 months up to a years worth of treatment to see the best results. The decreased size of the muscle is impressive after a year of Botox therapy. I have been surprised to see that the results of masseter muscle reduction seem to be maintained even if no further Botox injections are done. I don’t have a good physiologic explanation as to why that would be so, as Botox does not cause any permanent atrophy in the muscles of facial expression. But I have seen it enough now to realize that it is real clinical finding with Botox use.
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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