“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 ” (2023) Community Medicine and Education Journal, 5(1), pp. 410–414. doi:10.37275/cmej.v5i1.455.