Dear.Dr.Arnab Saha, good morning. Sorry. I am using this way to reply you. since mandible is considered as a base/ foundation it is bottom to top. almost all plastic / ent books say mandible to be corrected first. on this base we can reconstructe the entire facial bones. since it is a solid bone anatomical reduction is easy. always use bicortical pins. about soft tissue it is inside out. for eg. take lip repair after injury. we have to correct/ approximate the vermilion border first. since it is aesthetically important. if you are a omfs read books ent books Cummings /Bollinger. lot of plastic surgery books name few converse/ mathew. new authors have done a excellent work. thank you very much.