My son had his braces removed and now he has these ugly white spots that the dentist referred to as decalcification. 

What is decalcification and how do we get rid of them?                                                                                                                                                                                                                                                                                  
Tooth decalcification is caused by the excessive build up of plaque on the tooth enamel.  Eventually, such decalcification will cause cavities. Often, children with braces will develop significant decalcification around the brackets, creating a picture frame effect when the braces are removed.
Decalcification is the initial process of the enamel breaking down into a cavity.  The goal at this stage is to remineralize the enamel with good oral hygiene and prescription high fluoride products that contain Calcium and Phosphate.  Sometimes these white lesions may never go away and other treatment may be necessary. Dr. Abeyta can discuss what treatment may be best for you.