Hospital dentistry is the dentistry in which dentists provides routine dental care for phobic, developmentally disabled and medically complex patients. It includes the dental care, including comprehensive treatment, of long-stay hospital in-patients. It includes the provision of consultant advice and treatment for cases of special difficulty referred to hospitals by general dental and medical practitioners, or for patients admitted to hospital as a result of trauma or disease, the dental care, including comprehensive treatment, of long-stay hospital in-patients. It is highly specialised and covers oral surgery, restorative dentistry, paediatric dentistry and orthodontics. Hospital dentists tend to see fewer patients than general dental practitioners, but their treatment is usually more complex as they have generally been referred by a general dental practitioner or doctor.