How can I make my bite smaller?

I notice that my jaw (bite) look wider than ideal. I'm not sure if it's my bimax protrusion that created such appearance or if my jaw is simply big. Or, it could be that my teeth aren't big enough or don't align in aesthetical proportion. Question: Is there treatment to reduce the (apparent or real) width of my bite? Please take into consideration that I'll be undergoing double jaw surgery regardless.

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