I had a crown done on a molar on july 2 , I asked for a mirror so I could watch and I noticed a brown spot on the tooth after prep , I said whats that decay still there for , its suppose to be decay free , dentist said it's not decay , I forgot what he called it and told me it is not an issue , has anyone ever heard of a brown spot that's not decay , I still have the temp crown on and am thinking of getting a second opinion on this brown spot , I was on valium at the time and I didn't question him more like I normally would have for total peace of mind