title: Instruction in oral hygiene--a group approach.
mesh_terms: D000704:Analysis of Variance; D001296:Audiovisual Aids; D003773:Dental Plaque / Q000517:prevention & control; D006126:Group Processes; D006267:Health Education, Dental / Q000379:methods; D006801:Humans; D008297:Male; D009910:Oral Hygiene; D011795:Surveys and Questionnaires; D013663:Teaching