NUMBER OF BLACK-PIGMENTED ANAEROBIC BACTERIA CONTAINED IN THE GINGIVAL CREVICULAR FLUID (GCF) OF PATIENTS SUFFERING FROM THE CHRONIC PERIODONTITIS AND AGGRESSIVE PERIODONTITIS - Praharani, Depi; Pujiastuti, Peni; Wahyukundari, Melok Aris; Daat Arina, Yuliana Mahdiyah; Sari, Desi Sandra (Faculty of Dentistry, Universitas Islam Sultan Agung, 2021)