الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
The chin is a prominent facial feature that plays an important role in the overall facial appearance. The deficiency of chin is one of the deformities that cause facial disfigurement. It is not only congenital but may also result from other causes . The soft tissue response after orthognathic surgery between the patients with thick and thin soft tissues should be taken into account while planning the surgery. The sample involved in this study included lateral cephalometric radiographs of 180 adults Egyptian Orthodontic patients both males and females of different vertical skeletal pattern who attended for treatment at the Orthodontic department at Faculty of Dentistry, Tanta University