Botox for masseters - injection techniques and dose? (Photo)

The standard dose is 25U on each side. That's a good starting point for you. I introduced this technique to North America many years ago at ASAPS plastic surgery meeting  - you may be able to find someone in your area, because now many practitioners have found this technique extremely useful. 

Thank you for the detailed question and corresponding photo. You look like you may benefit from Botox injections to help slim down the left lateral face and jaw. Botox relaxes the masseter muscle and causes it to slim down, de-bulking the lower half of your face. It takes at least 25 units per side of the face and lasts 4-6 months. Some people with stronger masseter muscles require higher doses which is why I recommend seeing a board-certified plastic surgeon or expert injector in-person so they can examine your muscles in action and determine the correct dose for you. At our practice, we offer Skype/FaceTime consults for patients who live out of New York State. For more information, please visit our webpage.

Since this is your first time, I’d suggest starting on the conservative side with Botox. About 20 units on each side can relax the bulky muscles. Your board-certified dermatologist will be able to pick the best injection sites to give you the jawline you want.

Hi and thanks for your question. Botox injection for masseter reduction will help slim the jawline, but it will take a series of treatments. In order to determine your dose of Botox, you would need an in person visit, but I would probably start at 20 - 30 units per side, depending on how firm the muscle felt. I would suggest distriuting the Botox throughout the muscle. Leaving part of the muscle untreated can result in unsightly bluges when you chew. 
Most people will start seeing a change after the first session and after the second one it will be really significant. After a few sessions there is a good chance that you can stop and not need further injection. Most people have enlarged masseters because they have a habit of clenching and grinding their teeth from stress. 3 or 4 Botox sessions spaced about 3 months apart can break that habit. The bonus is that any headaches, neck pain or jaw pain you experience from grinding or clenching will also disappear. Hope that helps.

thanks for your question, It looks like you've done your research and selected your expert. I would recommend not learning too much about technique as this tends to cause confusion. Identify what you want to have done, and select your professional then trust them (him or her). I love it when patients ask questions and are knowledgeable (it's actually my favorite) but trying to understand technique is beyond the scope of what's reasonable. Hope this helps and God Bless!Dr. Robb

Thank you for your question. The amount of Botox required for treating the masseter muscle varies from person to person. However, the typical dosage for initial treatment is between 20-30 units per side. An experienced injector will be able to determine appropriate injection site placement. Hope this helps!

Botox combined with radiofrequency can help slim the jawline. The amount needed will vary and needs an in-person evaluation. Botox results resolve in 3-4 months. Best, Dr. Emer

The masseter muscle attaches to the lower broder of the mandible or jaw near the back (at what is called the Angle of the Mandible). Injections are done in this area, right in front of it, and up along the jaw about 1 cm. Dosing can vary. Some say you should use 15-20 Units per side, but I usually use more like 10-12 and have seen very nice results with the lower dosing.

In the dental literature showing Botox was effective in helping with masseter hypertrophy and teeth clenching, most studies looked at 10-20 units per side, but my opinion has always been to start slow, as you can always add more but you can't take it away until it resolves. In my practice I typically start with 6-8 units per side, but it is very individualized as everyone's muscle is different in size and shape, and that is where getting it done by an experienced provider is the most important. Good luck!

Botox/Dysport injection to the masseters can reduce masseter muscle bulk, slim the face, and help with grinding. I typically start with 25-30 units of Botox or an equivalent amount of Dysport per side.