**1. Introduction**

Orthodontic treatment goals can be divided into five categories: facial esthetics, dental esthetics, functional occlusion, periodontal health, and stability.[1] Nevertheless, when a severe skeletal deformity exists in non-growing teen and adult patients with significant skeletal jaw discrepancy, the goals of treatment are often impossible to achieve by orthodontics alone. In these circumstances, both orthodontics and surgery are required to correct the dental malposition and the skeletal disharmony. This corrective jaw surgery, also called orthognathic surgery, is performed by oral and maxillofacial surgeons to correct a wide range of minor and major skeletal and dental irregularities, including the misalignment of jaws and teeth, which, in turn, can improve chewing, speaking and breathing. Orthodontics in conjunction with orthognathic surgery can do wonders in improving the appearance of the face. Combined orthodontic and surgical treatment usually requires about 18-24 months to complete. The treatment may be divided into four stages:

