[Guidance in oral hygiene for the first and second graders].
D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D009910:Oral Hygiene / Q000379:methods*; D010353:Patient Education as Topic; D010358:Patient Participation; D013663:Teaching / Q000379:methods; D014099:Toothbrushing / Q000379:methods*