Preventive dentistry is the practice of caring for teeth to keep them healthy. This helps to avoid cavities, gum disease, enamel wear, and more. Preventive dentistry can be practiced in the form of daily brushing and annual dental cleanings. These practices are designed to ensure that teeth are clean, strong, and white. Operative dentistry is the art and science of the diagnosis, treatment and prognosis of the defects of teeth that do not require full coverage restorations for correction.