Support for the Symposium and these Proceedings was providedby unrestricted educational grants from the John O. Butler Company(Chicago, IL, USA), Interplak by Conair Corporation (Eatontown,NJ, USA), Oral-B Laboratories, The Gillette Company (Boston,MA, USA), Philips Oral Healthcare (Snoqualmie, WA, USA), SonexInternational Corporation (Columbia, MO, USA), and WaterpikTechnologies, Inc. (Fort Collins, CO).