Zulfi Amalia Bachtiar, Tanty Deriaty, Nurul Khofifah Nasution and Ayu Augustine Novita 2025. The Relation Between Oral Health Maintenance Knowledge and Junior High School Students’s Age and Gender in Denai District Medan . DENTA JURNAL KEDOKTERAN GIGI. 19, 2 (Aug. 2025), 116–121. DOI:https://doi.org/10.30649/denta.v19i2.8.