title: [Relation of the rectangle-index and caries appearing in the upper first molars of schoolchildren].
mesh_terms: D002648:Child; D003731:Dental Caries / Q000453:epidemiology* / Q000473:pathology; D005260:Female; D006801:Humans; D008297:Male; D008963:Molar / Q000033:anatomy & histology*; D012737:Sex Factors