Our sons teeth have very weak enamel. He has his back teeth sealed and he still got a cavity on the side of the tooth. We brush and do the best we can but it never fails that he ends up with a cavity when we take him to the dentist. I’m going to ask the kids dentist about the prescription toothpaste the woman told me about on the other post. She said you brush with it and leave it on when they go to bed to help protect the teeth. Anything that works we’ll give a try. Teeth are very important, I know that coming from a family that has bad teeth even without a medical disorder.:(