I had a surgery to fix a bad underbite in Dec 2015 in Canada.
The surgery did fix the underbite (to a certain extent, still have some problems but that's for another post).
The problem is that my lower jaw / chin look way smaller (as a result my face is less masculine as compared to when I an underbite).
My first question

The second question is: does one have to have a perfect bite before such a surgery (chin implant or genioplasty). I'm asking this because I still have a cross bite at the back of the mouth and I'm wondering what should I do first: correct the cross bite or get the surgery. Correcting the cross bite may not even be possible.

Cheers!