BBAuthors: Galal, Manar; Advisor: -; Participants: Zaki, Dalia Y.; Rabie, Mohamed I.; El-Shereif, Samia M.; Hamdy, Tamer M. (2020)
Solubility was evaluated after 7- and 14-day immersion time of specimens in phosphate buffer saline solution (PBS); the mean weight loss was evaluated and solubility was calculated as a percentage of the weight loss. For assessment of pH change and calcium ion release polyethylene tubes filled with the materials were soaked in distilled water for 7 and 14 days. Measurement of pH change was done by analytical pH meter. Concentrations of calcium ion release were measured using inductively coupled plasma optical emission spectroscopy. Data were statistically analyzed by independent sample t test and paired sample t test at 5% significance level. Harvard MTA endodontic cement showed signi... 
