What will the dentist do if i have a cavity in my front tooth that is too big for a filling?

Question by Chase: What will the dentist do if i have a cavity in my front tooth that is too big for a filling?
what size cavity is as well massive for a filling, it is fairly big, taking up about a third of my front tooth, the top rated third of the tooth is missing to be exact. I am 15 many years old, it IS a permanent tooth. I am very embarrassed. What will the dentist do?! I am scared, will I be missing a front tooth forever?! how pricey will it be to repair? PLEASE Support. Thank you
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