In preventive dentistry, the idea is to visit the dentist for a checkup before problems arise rather than to treat dental problems after they occur. Dental checkups not only include tests for gum disease and cavities, but also involves cleaning and getting advice on brushing. In this episode, find out the latest testing equipment developed in Japan including the Optical Coherence Tomography (OCT) used for diagnosing early stages of tooth decay and a saliva test that can determine the condition of your gum disease and tooth decay.