Asymmetric jaw muscles (masseters) from grinding? Will Botox help or do you believe this to be a bone asymmetry? (Photos)

Thank you for your detailed question and corresponding photo. Yes, Botox can be used to help teeth grinding in patients who have pain or a strong visible masseter muscle. I would start with at least 25 units into the left jaw and see if that makes a difference for you over the course of 3 months, we could always go up on the dose at the next treatment until we figure out what dose is perfect for you. I recommend seeing a board-certified plastic surgeon or expert injector in-person to examine your muscles and treat you appropriately. At our practice, we also provide consults via FaceTime or Skype for patients who live outside of NY. For more information, please visit our webpage. 

You are really asking two questions.  The first questions deals with the efficacy of Botox on Masseter muscle hypertrophy and facial asymmetry.  I practice in Washington, DC and many people grind their teeth so I have the opportunity to perform a great deal of Botox injections to the masseter muscles to reduce the strength of the clenching.  One of the benefits of these injections is that is also can reduce the size of the muscle much like if you stopped working out your biceps they would also reduce in size.  From the photos that you have provided I do not think that your facial asymmetry is 100% due to masseter hypertrophy.  I think, like all of us, you have some facial asymmetry that is not due only to muscle hypertrophy.  

I appreciate your question. It looks like hypertrophied muscles which should respond nicely to Dysport it Botox. See the video below!Dr. Aldo