Botox treatment for teeth grinding, how does it work? Botox will be injected into the muscles responsible for moving your jaw – mainly the masseter muscle, which is responsible for chewing. It may also be injected into the frontalis and temporalis muscles tailormade for your specific needs. The botulinum toxin will reduce clenching, and it will also help reduce tension and aches as well as protect your teeth from wearing down and other consequences. Botulinum toxin usually ki