PREVALENCE OF GINGIVITIS AND PERIODONTITIS IN NORTHERN INDIA: AN ORIGINAL RESEARCH STUDY . International Journal of Medical Science and Dental Health, [S. l.], v. 6, n. 07, p. 01–04, 2020. Disponível em: https://www.ijmsdh.org/index.php/ijmsdh/article/view/60.. Acesso em: 18 jul. 2025.