Hello, I am not sure how many treatment you had...but if you only had one injection, that should not have caused any significant permanent muscle loss of function. If you have had several treatments over a long period of time...then you could have sustained atrophy of the muscle due to non use...which should get better with use and exercising the muscle. It sounds like you would benifit by seeing a craniofacial plastic surgeon who could better address your occlusion complaints as well as masseter function. Good Luck.
The thing that makes Botox unique is that it is not permanent
Thanks for the question, thanks for the photos, and sorry that you are having problems this far out from your Botox injections. The thing that makes Botox unique is that it is not permanent – it will last 3-4 months in most, and sometimes a little longer in the masseter regions that you had injected. Even if a nerve was “hit” during the injection, it would have rejuvenated by now. So if you are having concerns at this point, I would recommend that you make an appointment with a neurologist to see what in fact is going on here.
Botox and Jawline Contouring
Botox treatments are not permanent and typically resolve after 3-4 months, sometimes a little longer on the jawline. You may have other issues that need evaluation. I suggest seeing a neurologist for an evaluation. Best, Dr. Emer.
Slimming jawline with Botox lasts for 3 to 6 months
From you pictures, I can't see any asymmetries. If you indeed got Botox, there is no permanent effect from it. If you are having occlusion problems, you need to see your dentist of an orthodontist.