Rough edges on my lower and upper teeth

The edges of my teeth are like zig-zag patterned. I know that it is natural, its supposed to be that way so the permanent teeth can make its way out of the gums and it wears down, but am 20 years old now and my teeth are still very zig-zag like. This embarrasses me to talk to someone up close :( However, I do tend to eat a lot of sweets.

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