By Marianne Lincoln This is the third in a series of stories from the Pierce County Oral Health Summit. Dr. Dave Hansen DDS along with many attendees learned a new word, cariology. As defined: car·i·ol·o·gy (kâr’ē-ŏl’ə-jē) n. The study of dental caries and cariogenesis. He began his discussion with the observation, “If you stick around…