Approaches to preventive periodontal care for geriatric patients with somatic disorders Tatiana Elovikova, Svetlana Sablina, Sergei Grigorjev, Vera Karaseva and Anatoly Koscheev BIO Web Conf., 22 (2020) 01020 Published online: 06 July 2020 DOI: 10.1051/bioconf/20202201020