I remember my classmate back in college. I think she was the prettiest girl in class but she felt the opposite because she did not have nice teeth. Her teeth had yellowish stains. She told me that they were caused by the elastic ligatures of her braces.
Today, this kind of teeth stain is not a big problem anymore. San Diego Cosmetic Dentist can effectively remove teeth stains through a procedure called zoom whitening. It's now easier to have a lovely smile that can give you the confidence you need to be more successful in life.