Preventive dental treatment is meant to keep your mouth healthy and encourage good hygiene habits. It is important that you schedule regular dental exams and cleanings. Preventive dental care can help you catch problems early so that they don't become serious. Preventive dentist services include routine dental checkups, cleanings or dental sealants. Preventive services are vital for the good health of your gums and teeth. They do not include root canal therapy. Orthodontics or tooth extractions.