In the mid 1980’s CT assisted 3D imaging and modeling of the skull was introduced for use in maxillofacial surgery. In a majority of patients with congenital and acquired cranio-facial anomalies, the deformity is 3 dimensional in nature and many patients are asymmetric. In such cases, 2D diagnostic records are rendered inadequate and the benefits of CT may outweigh the risks. www.indiandentalacademy.com