Frandsen, A M The effectiveness of the Charters', scrub and roll methods of toothbrushing by professionals in removing plaque. [electronic resource] - Scandinavian journal of dental research 1970 - 459-63 p. digital Publication Type: Comparative Study; Journal Article ISSN: 0029-845X Standard No.: 10.1111/j.1600-0722.1970.tb02098.x doi Subjects--Topical Terms: AdolescentAdultDental Plaque--prevention & controlHumansMaleMethodsToothbrushing