Dentistry is a specialty with sub-specialties like pediatric dentistry, orthodontia, oral rays, dental surgery...Maxillofacial includes a range of common oral surgical problems (eg. impacted teeth, dental implants), jaw and congenital facial disproportion, facial trauma, oral cancer, salivary gland disease, temporomandibular joint disorders, and various benign pathologies (eg. cysts and tumours of the jaws).