Plaque levels in relation to the number of toothbrushing strokes in uninstructed English schoolchildren.
D000293:Adolescent; D003753:Dental Health Surveys; D003773:Dental Plaque / Q000473:pathology; D003774:Dental Plaque Index; D004739:England; D006267:Health Education, Dental; D006801:Humans; D013997:Time Factors; D014099:Toothbrushing / Q000379:methods*