The dentist says she has decalcification of her molar. I don't understand what this is and what causes it. The tooth is weak and already has a tiny cavity and it just came in. He said it could be genetic and there is nothing that can be done about it. She will probably need caps. Can I do anything to improve the teeth that have not yet come in? What about sealants to protect the new teeth. her front ones came in fine. Help I hate not having information and most of the sites the come up for decalcification are adds for teeth whitening or phorensic science.