Effect of 0.12% Chlorhexidine Gel and Tooth Brushing on Porphyromonas Gingivalis Levels in Subgingival Plaque and Matrix Metalloproteinase-8 (MMP-8) Levels in Gingival Crevicular Fluid of Children and Adolescents with Down Syndrome. (2020). Global Journal of Medical Research, 20(J1), 5-12. https://medicalresearchjournal.org/index.php/GJMR/article/view/1975