Is the result of surgical masseter reduction permanent?

It is more effective to inject the 20 units in the lower and more posterior parts of the muscle as the aim is to achieve a V shaped lower face, therefore the lower and posterior parts of the muscle should be targeted to shrink more. By placing 20 units in one spot only, the doctor can not reach the other parts of the muscle and you may just get a overall sunken face rather than a slim tapering lower face. Also , by injecting in the lower and posterior parts , the doctor can avoid Botox fromflowing in front to the risorius muscle , which will cause an asymmetrical smile .

TMJ(temporo-mandibular joint) issues have increased dramatically over the last 20 years. My personal opinion is that there is no dysfunction of the joint or the muscles. TMJ issues are widely accepted to be caused by bruxism. The root cause of this is stress, internal or external. Human beings are programmed to respond to high levels of stress with the "Fight or Flight" reflex, otherwise known as the Sympathetic Reflex. Part of this reflex involves us clenching our teeth. Therefore, I believe that all the issues are due to hyperfunction.