@dannydecosta The Temporomandibular Joint (TMJ) is one of the hardest working joints in our bodies, and is used for speaking, chewing, yawning, and making facial expressions. Our mouth is a complex part of the body which besides its bones structure and nerve system, sits under your brain, and a gate for what goes in or out your body. https://www.folwellnesscenter.com/product/tmj-work-full-mouth-work/