Solubility of Two Root-End Filling Materials over Different Time Periods in Synthetic Tissue Fluid: a Comparative Study.
BACKGROUND
Insolubility is an important criterion for an ideal root-end filling material to both prevent any microleakage between the root canal and the periradicular space and provide sealing ability.


OBJECTIVE
Many recent studies have shown that mineral trioxide aggregate (MTA) and calcium-enriched mixture (CEM) have acceptable sealing ability. The purpose of this in vitro study was to evaluate the solubility of these root-end filling materials.


METHODS
Forty stainless steel ring moulds with an internal diameter of 10±1 mm and a height of 2±0.1 mm were selected. Samples of MTA and CEM were mixed according to the manufacturer's instructions and inserted into the moulds. The specimens were divided into 4 experimental groups and kept in synthetic tissue fluid (STF) for 2 different time periods (7 and 28 days). The control group contained 8 empty rings. The moulds' weights were recorded before and after immersion in STF. The changes in the weight of the samples were measured and compared using a two- way ANOVA test at a significance level of 5%. Specimens were evaluated with scanning electron microscopy (SEM) at a magnification of 500×.


RESULTS
There was no significant difference in weight changes between MTA and CEM samples (p> 0.05).


CONCLUSIONS
MTA and CEM have similar solubility in STF in different time periods.
Dept. of Endodontic, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.
Nooshin Sadat
NS
Shojaee
Dept. of Endodontic, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.
Safoora
S
Sahebi
Student, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.
Elahe
E
Karami
Dept. of Endodontic, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.
Fereshte
F
Sobhnamayan
CEM; Calcium Enriched Mixture; MTA; Mineral Trioxide Aggregate; Solubility