Q. Hello today I have impressions done to my teeth and you might think I have gone crazy but I notice that my teeth hasa gone more yellow. Is this possible? moreover I have noticed that a bit of my shiny cover (enamel?) is gone from one of my teeth. Is the technique so agressive that this is likely to happen? I am quite frustrated because i did it to get a night guard to stop me grinding in the night and now I don’t know if it was such a good idea… Thanks for comments