Oral and Maxillofacial Surgery is that specialty of dentistry that includes the diagnosis, surgical and adjunctive treatment of diseases, injuries and defects involving both the functional and aesthetic aspects of the hard and soft tissues of the oral and maxillofacial region. It is a surgical specialty focusing on anaplasty of the face, facial trauma surgery, the oral fissure, head and neck, mouth, and jaws, as well as facial cosmetic surgery. An oral and maxillofacial surgeon is a regional specialist surgeon who treats the complete craniomaxillofacial complex: anatomical area of the mouth, jaws, face, and skull, head and neck as well as associated structures. As stated by the national jurisdiction, oral and maxillofacial surgery may require a degree in medicine, dentistry or both.