Using magnetic resonance imaging (MRI) to measure MMV ... More information: Abulaiti Abudurezake et al, Masseter Muscle Volume and Its Association with Sarcopenia and Muscle Determinants in ...

Masseter Botox relaxes your jaw muscle, which is the muscle that helps you chew. You can get masseter Botox to make your lower face appear slimmer and less square-shaped. It can also help pain ...