Anyone who values you less because of your appearance is not worth your consideration.

This does discount physical and medical consequences, which are absolutely worth noting, but whether others notice your missing tooth should not be an issue.

It makes sense and is understandable that you would feel sensitive about it, including wanting the tooth back, but its absence does not reflect upon you as a person and ideally you don't feel bad about it.

This isn't meant to dismiss trauma, but help with any insecurity. Personally, I'd rather hear what you have to say rather than whether you can chew adequately.

Hopefully you get your tooth back if its absence is causing you stress.

edit: I don't mean to invalidate any of your feelings on the subject. I don't have any visibly missing teeth, but my mother very prominently did. If anything I said above isn't accurate, I certainly yield to you, but I hope that something above helps.