This is Dr. David
I would see a regular dentist for dental evaluation and cleaning and evaluation of your gums at first if you haven't seen a dentist recently.
it doesn't sound like you have seen a dentist in a year or more.
I would see a private cosmetic dentist as the next step if you don't have problems with your teeth and gums.
they could help with veneers or caps which could help your teeth look better and stay in place better.
you may have to floss more and eat more fruits and vegetables to help your gum health to better hold on to your teeth as well
let me know if you have other questions.
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they could possibly give you braces at your age to help straighten your teeth. this can be done at your age .
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