“My daughter is sixteen, and she had her braces removed a year and a half ago. We noticed that her teeth become more yellowish near the gums on her upper jaw. Our orthodontist even gave us a hard time about her oral hygiene. We got a retainer after her treatment. I took her to my dentist afterwards, to see if anything could be done to stop or reverse this discoloration. My dentist, who is always extremely helpful, told me much to my surprise that he cannot help us at all, because the child had lost enamel. He also told us that these teeth are much likelier to develop caries, and once they develop them, he can make them whiter, but not before. Am I at fault, did we neglect to do something? How can I whiten her teeth without more serious interventions?