Healing of root perforations treated with mineral trioxide (MTA) and portland cement - Broon, Norberto Juárez; Bramante, Clóvis Monteiro; Assis, Gérson Francisco de; Bortoluzzi, Eduardo Antunes; Bernardineli, Norberti; Moraes, Ivaldo Gomes de; Garcia, Roberto Brandão (Journal of Applied Oral Science, 2006)