Preface; Acknowledgements; Authors; Reactors; Planning committee; Welcoming remarks; Role of supragingival plaque in oral disease initiation and progression; Role of oral hygiene practices in oral health and general health; Current utilization of oral hygiene practices; Mechanical oral hygiene practices; Antimicrobial agents; Methods for plaque biochemistry alteration; Tooth-surface alteration agents; Ecology alteration; Systemic agents; Behavioural research related to oral hygiene practices; Working group reports and recommendations; Future directions for dental plaque control measures and oral hygiene practices; General discussion; Concluding remarks; List of participants