Most mornings I wake up with a tension headache and very sore jaws from grinding me teeth whilst I sleep. I usually get 4 teeth re-capped every two years or so due to this condition. I understand that grinding releases more mercury vapour than normal. Does anyone out there know if Mercury toxicity actually causes grinding ? Were any of you shocking grinders pre amalgam removal and then got any better post removal ? Please don't say yes just to make me feel better !!