Ion release and pH of a new endodontic cement, MTA and Portland cement.
BACKGROUND
This in vitro study measured and compared pH and phosphate and calcium ions release of a new endodontic material (CEM cement), mineral trioxide aggregate (MTA), and Portland cement (PC) using UV-visible technique, atomic absorption spectrophotometry methods, and pH meter, respectively.


METHODS
Each material was placed in a plastic tube (n=10) and immersed in a glass flask containing deionized water. Half of the samples were tested for determining pH and released ions after 1h, 3h, 24h, 48h, 7d and 28d. Remaining samples (n=5), were evaluated after 28d. Data was analyzed using one way ANOVA and Tukey tests.


RESULTS
Results indicated that all materials were highly alkaline and released calcium and low concentration of phosphate ions in all the time intervals. CEM cement released considerably higher concentration of phosphate during the first hour (P<0.05).


CONCLUSIONS
This novel endodontic cement promoted alkaline pH in a similar manner to MTA and released calcium and phosphate. These conditions can stimulate the calcification process and explain the basic physico-chemical mechanisms of hard tissue regeneration of CEM cement.
Researcher, Dental Research Center, Dental School, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
Sara
S
Amini Ghazvini
Maryam
M
Abdo Tabrizi
Farzad
F
Kobarfard
Alireza
A
Akbarzadeh Baghban
Saeed
S
Asgary
CEM cement; Calcium; Ion release; MTA; NEC; New material; Phosphate; Portland cement; pH