ANSWER:

This is permissible only if this is to fix a defect, an abnormality, or something that impairs your bite when eating or your speech when speaking. 

If it is merely for beautification, this is not permissible.

Is it permitted in Islam to shape the misshapen teeth or it will be considered as renovation in Allah’s creation? (other than braces because I know braces are allowed) I want to straight my upper and lower teeth at the ends where both meet.