Will orthognathic surgery solve asymetey in jaw and smile associated with congenital torticollis?

Childhood neck contractures are an interesting topic in terms of correction of lower 1/3 facial asymmetry with orthognathic surgery.  Contractures certainly influence facial growth. Upper and lower jaw surgery can improve this skeletal aymmetry markedly but you are right to address the neck first. The reason is head position.  The way you hold your head influences your facial asymmetry.  Many surgeons treat to corrected head position. If you are unable to achieve this head position then you will still look asymmetric after surgery.  On the other hand if the surgeon treats you to natural head position and then you have your neck released your facial asymmetry could return.  I would treat your neck, do some physical therapy and then consult with someone about orthognathic surgery. Make sure the surgeon does virtual surgical planning because it really helps with planning these cases. Good luck!