The effectiveness of chemical denture cleansers and ultrasonic device in biofilm removal from complete dentures oleh Patrícia Costa Cruz, Ingrid Machado de Andrade, Amanda Peracini, Maria Cristina Monteiro de Souza-Gugelmin, Cláudia Helena Silva-Lovato, Raphael Freitas de Souza, Helena de Freitas Oliveira Paranhos