Is Teeth Whitening a Good Idea for Someone with Stains from Braces?

Unfortunately I see this all too often especially with young adults (kids) that don't take care of their teeth while having braces.  Simply whitening the teeth generally does not take away the "staining".  Most of the time it s bright white area on the tooth or a decalcified area.  I have heard that trying to re calcify those areas with MI paste can sometime help, but I have never seen it actually work. Generally some bonding with composite can help or even veneers will help. Also a good cleaning will remove real staining.   

Teeth with stains after braces can be whitened several ways.  The question of what is right for you depends on the "stains."  You might have areas that started to decay and stained, you could have superficial stains that could be polished off, and you could even just still have cement residue from when the braces were removed.  A visit to a trained cosmetic dentist could determine your best choice to make your nice straight teeth an even white color.

Previous doctor is correct. It will depend on your specific staining if they are actually stains or decay/erosions in enamel. But I will add if they are stains teeth whitening would probably be quite effective for you to remove or make them far lighter than they are now. Good luck with treatment.