Thank you all for your answer, atm I'm speaking with Dott. Tito Marianetti from Rome. He do bimax in surgery first (With no before op. braces) when there is no malocclusion. On top of that he can do also chinwing in the same operation, but I need to take xrays to see if it's worth it or not... Other then the small Jaw i also have an absent ramus, and I saw that with chinwing your ramus will get longer.