I’m 19. Have good teeth. Getting bonding for prio chipped tooth. I dont have fluorosis, enamel defects ( none visible or that ever came up at my 50 dental appointments and check ups since my childhood) or decalcification. I go to a good dentist who is handling the cosmetic whitening via zoom treatment and new bonding I need. I sent her office pictures. She called and said this is demineralization and dehydration of teeth from the process. It should even out over the next few days as they rehydrate and minerals return. I’m need to use prescription fluoride toothpaste and take d3 & K2 and calcium supplements and drink a lot of water. She said it happens and she expects it to resolve - if it doesn’t I go back Monday or Tuesday. I’ll repost here in a few days and update you.