What to do about teeth enamel?

my friend was wondering if it can get better on its own because she has been doing what she always does brushing and flossing and using this floride mouth rinse and her enamel has been looking better the crack looks like it going away is that possible i think she has made an appt with the dentist but its like 3 weeks away (its all the dentist had)is it possible to heal it self? oh yea she uses crest professional it highly recommended by the dentist. her parents both have teeth promblems.any advice or answers welcomedWe all have little cracks in our enamel, but it doesn't mean anything needs to be done. They will often collect stain and look more obvious, but they do not go away. Your friend should add xylitol to her diet (5 to 15grams over the course of the day). It kills bacteria to help keep the mouth healthy. You can find it online as gum and mints. Some local stores carry gum... ice breakers, altoids cinnamon flavor gum, xylifresh, xylichew... Just make sure that xylitol is the first ingredient listed.