Q. I have no enamel on my teeth and find it very frustrating when I smile that my teeth are yellow,is there a way to brighten them without distroying them? I also am going through having every tooth filled as due to lack of enamel, I have a lot of cavities, but the fillings do not always stay in and have to be replaced, is there a way to coat my teeth to protect them as the enamel would normally? Thank you!