Sometimes the TMJ can cause headaches, jaw pain, neuro problems and can be very painful to jaw, neck and shoulders. I wear a mouth splint at night so I won't grind my teeth as I have TMJ. I am a reg Dental Hygienist and worked for a specialist for years. Guess he is ruling out other disorders. The mouth splint works really well. A TMJ specialist should do the impression and splint. It can also help some people with sleep apnea.