The TMJ resting position is the most relaxed position of the jaw when not talking or eating. 1. When the jaw is in the most relaxed position when not talking or eating, the upper and lower jaw teeth are not in contact with each other, there is a gap of 2-3 millimeters, the upper and lower lips are closed, the tongue is against the palate, and the muscles are relaxed at this time. In the lower jaw do not carry out functional movement are in this position. 2. If the teeth are in contact for a long time it will make the muscles tense and sore. The tongue is not in the resting position of the palate but between the teeth of the upper and lower jaws, which not only causes soreness but also leads to the formation of localized openings in the upper and lower jaws when the teeth do not bite together. Therefore, the position where the teeth do not touch under normal relaxation is the resting position of TMJ.