Q. I have three crowns on my teeth. One of my crowns has been hurting a pit and is pressure sensitive. The pain is minimal but because I have had so much dental work I have concern. This tooth has been canalled and has been treated by an endo and given the all clear to be crowned. I have been wearing the crown for over a year. My other two crowns are white all over but this crown appears to look grey on the top surface and is smooth and worn. Do you think I could have worn down a crown this quickly? Thanks,