I don't exactly have experience directly. My ear,nose and throat dr., during a checkup of an ear infection say that I was clenching my teeth. It' s something that has been going on for the last year or so. He suggested botox injections in the massiter muscles. When I saw my dentist he said, "Oh, great idea... inject dilute botulism toxins into an essential muscle. " I don't know who is right but I figured I'd rather be safe than sorry. Bought a bite guide instead! Scott ---------------------------------------------------------------------- To sign-off Parkinsn send a message to: mailto:[log in to unmask] In the body of the message put: signoff parkinsn