Hello, I'm 41 and have a significant bruxism issue. Two-and-a-half weeks ago I had a zirconia layered with porcelain crown placed on #19. Since then I have seen three dentists (including the doctor who did the work) because of pain. All three have agreed that the crown is seated properly, my bite is healthy and x-rays look good. The tooth has been examined (tapped) with no problems. And my night guard has been examined, determined to be in good condition. However, I still have sensitivity to cold on the inside of the crown. Moreover, there is a dull pain (sometimes sharp) when I chew. Also, I'm still having headaches, and in the evening/night my teeth ache - especially the crowned molar. Twice I've woke up in the morning with a strained trap muscle (left side - same as crown) that has limited my mobility for days at a time. I was told the head, neck and back pain is a result of grinding, but I never had head, neck or back pain prior to this crown. I hate to think headaches, neck and back pain are going to be a new normal. If my bite is okay could this be the result of grinding on the zirconia, porcelain material? I wanted a gold crown and was talked into the layered zirconia instead. I've considered having the current crown replaced but due to the chewing pain the dentists I've consulted believe the nerve is still fragile and want to give it more time to heal (or determine a root canal is needed). I'm in pain and it's affecting my day-to-day as well as my sleep. Any thoughts are appreciated. Thank you.