Influence of the addition of calcium hydroxide powder on some physical and chemical properties of the sealer MTA Fillapex - Keine, Katia Cristina; Guiotti, Flavia Angélica; Leonardo, Renato Toledo; Kuga, Milton Carlos; Duarte, Marco Antonio Hungaro; Campos, Edson Alves de; Andrade, Marcelo Ferrarezi de (World Journal of Dentistry, 2012)