My 20 year old son has white spots on both permanent front teeth since a child. I thought it came because of a preventative antibiotic he was given for 15 months as a two year old for ear infections. The dentist just did microabrasion on them one month ago. It faded a little but the white spots are still there. He ask the dentist yesterday if he could use the white crest strips and he said that would be fine. He started last evening and today the white spots are so white. Because of the microabrasion did this make the white spots worse because the enamel isn’t there as much and is more open and the whitening from the strips filled in. Thanks, mother is concerned.