Prevalence of four putative periodontopathic bacteria in saliva of a group of brazilian children with mixed dentition: 1- year longitudinal - Sakai, Vivien Thiemy; Campos, Marilene R.; Machado, Maria Aparecida de Andrade Moreira; Lauris, José Roberto Pereira; Greene, Andrew S.; Santos, Carlos Ferreira dos (International Journal of Paediatric Dentistry, 2007)