My sister has crooked and gaped teeth. She is twenty-five. I am trying to help her find information about braces. She is worried she is too old. I explained to her that there is no age limit on having braces. So I got her to at least look into it. What I need is any information on the different types of braces so I can give that to her. She will be seeing a dentist about braces in three weeks but needs to know what to ask and so she can be prepared.