Domenick T. Zero, DDS, MS, is an expert in the field of cariology and the use of in situ caries models. As the primary investigator, he has received more than $6 million in research grants from the National Institutes of Health and private industry. He is the president of the Cariology Research Group of the International Association for Dental Research. Zero is the associate dean for Research, director of the Oral Health Research Institute, and professor and chair of the Department of Preventive and Community Dentistry at Indiana University School of Dentistry, Indianapolis