not only encompasses the field of dentistry and dental medicine, but also expands the common ground shared with other fields, including medicine, ag- culture, material science, engineering, and pharmacology. We aim to promote advances in dental research and to activate collaboration with related fields by putting interface oral health science into practice. On this basis, we have already organized the 1st and 2nd International Symposiums for Interface Oral Health Science, which included inspiring special lectures, symposiums, poster pres- tations, and other discussions. The contents of the two symposiums were p- lished as monographs entitled Interface Oral Health Science in 2005 and 2007. The 3rd International Symposium was held in January 2009 as part of this project.