The purpose of this study was to investigate and compare the crystalline structures of recently released
MTA Plus (MTAP), MTA Angelus (MTA-A), DiaRoot BioAggregate (BA) by X-ray diffraction (XRD) analysis.
MATERIALS AND METHODS:
Phase analysis was carried out on powder and set forms of tested materials. The powder specimens
placed into sample holders that were packed with a glass slide and the set samples prepared according
to the manufacturer’s instructions were placed into molds. The samples after being set for three days at
37°C and 100% humidity in an incubator were mounted onto the XRD machine and phase identification
was accomplished using a search-match software program.
XRD findings indicated that major constituents of MTA-P were bismuth oxide, portlandite, dicalcium
silicate and tricalcium silicate. The crystal structure of MTA-A were similar to those of MTA-P except for
the absence of portlandite. Additionally, MTA-A had tricalcium aluminate differing from MTA-P. BA mainly
differed from MTA-P and MTA-A by the radiopacifier (tantalum oxide-TO) in its composition.
The majority of constituents of the tested materials have shown similarity except for the presence of
tricalcium aluminate in MTA-A and the inclusion of TO in BA. In addition, set MTA-P showed a strong peak