What are retaners needed for
retaners are like braces but they are normally used for children instead of braces
wiki.answers.com/Q/What_are_retaners_needed_for

How old do you have to be to get a retaner
well, there is no ageing requirement to have a retaner,but you do need it after you dont wear
wiki.answers.com/Q/How_old_do_you_have_to_be_to_get_a_retaner

Does justin bieber have a retaner
Help us answer this question: Does justin bieber have a retaner [In categories: Celebrity Relationships, Justin Bieber]
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Can you get a retaner and braces at the same time
Help us answer this question: Can you get a retaner and braces at the same time
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Has Nick Jonas wear a retaner
I don't know if he still does but he did.
wiki.answers.com/Q/Has_Nick_Jonas_wear_a_retaner