2023. The Relationship Between Toothbrushing Habits and the Prevalence of Caries and Calculus in School-Age Children Grades 1-6 at Galilea Hosana School Elementary School, Medan Selayang District of North Sumatra, Indonesia . Community Medicine and Education Journal. 5, 1 (Dec. 2023), 410–414. DOI:https://doi.org/10.37275/cmej.v5i1.455.