Efficacy of herbal toothpaste on patients with established gingivitis: a randomized controlled trial - Ozaki, Fabiana; Pannuti, Cláudio Mendes; Imbronito, Ana Vitória; Pessotti, Wellington; Saraiva, Luciana; Freitas, Nívea Maria de; Ferrari, Graziella; Cabral, Veronica Neto (Brazilian Oral Research, 2006)