Oral and Maxillofacial surgery is concerned with surgical procedures to treat many diseases, injuries and defects in the head, neck, face, jaws and the hard and soft tissues of the oral (mouth) and Cranio-maxillofacial (jaws and face) region. It involves Head and neck cancer, Cosmetic facial surgery, Cleft/Craniofacial surgery, Cranio-maxillofacial trauma, Head and neck reconstruction (plastic surgery of the head and neck region), Maxillofacial regeneration (reformation of the facial region by advanced stem cell technique)