Evaluation of pH and calcium ion release of calcium hydroxide pastes containing different substances - Duarte, Marco Antônio Húngaro; Midena, Raquel Zanin; Zeferino, Márcia A.; Vivan, Rodrigo Ricci; Weckwerth, Paulo Henrique; Santos, Fernando dos; Guerreiro-Tanomaru, Juliane Maria; Tanomaru-Filho, Mário (Journal of Endodontics, 2009)