John D.B. Featherstone, MSc, PhD, is professor and dean of the School of Dentistry at the University of California, San Francisco (UCSF). He is also the Leland and Gladys Barber Distinguished Professor of Dentistry at UCSF. Over the past 30 years, Featherstone’s research has focused on cariology, including fluoride mechanisms of action; caries risk assessment; de- and remineralization of the teeth; apatite chemistry; salivary dysfunction; caries prevention; and laser effects on dental hard tissues with emphasis on caries prevention and early caries removal. The European Caries Research Organization presented him with the Zsolnai Prize in 2002 for his contributions to caries research, the World Congress of Microdentistry bestowed him with the Lifetime Achievement Award in 2003, and the Swedish Patent Fund awarded him the Ericsson Prize in Preventive Dentistry in 2003. Featherstone is also a Dimensions editorial advisory board member.