Oral and Maxillofacial Surgery is a surgical specialty within both medicine and dentistry. It studies the anatomy and embryology of the head and neck, including the teeth, face, jaw, and oral cavity. It studies oral and maxillofacial pathology and medical conditions such as oral mucosal diseases, maxillary sinus disease, oral and maxillofacial cancers, facial pain, temporomandibular joint disorders and oral and maxillofacial injury and trauma. Practice involves specialist knowledge, skills and technology to undertake diagnostic investigation, including radiology and nuclear medicine, and perform a range of surgical procedures, such as dentoalveolar surgery, orthognathic surgery, pre-prosthetic surgery and implantology, and reconstructive OMS. These surgeries, along with oral and maxillofacial prosthetics and other adjunctive technologies, help patients improve oral and maxillofacial function and quality of life, and prevent further disease, pain or injury. Specialist care is provided in collaboration with other medical, surgical, and health practitioners, such as craniofacial surgeons, plastic and reconstructive surgeons, GPs, ED staff, and community and allied health care teams. Oral and maxillofacial surgical services are provided in hospitals and private outpatient clinics. These services include acute and emergency clinical care, outpatient consultation and follow-up, and OMS for injury, pain, congenital defect, disease, or cosmetic purposes.