Marginal Adaptation of New Bioceramic Materials and Mineral Trioxide Aggregate: A Scanning Electron Microscopy Study
This study aimed to compare the marginal adaptation of new bioceramic materials, Endosequence Root Repair Material (ERRM putty and ERRM paste), to that of mineral trioxide aggregate (MTA) as root end filling materials.
Materials and Methods : thirty six extracted human single-rooted teeth were prepared and obturated with gutta-percha and AH-26 sealer. the roots were resected 3 mm from the apex. Root-end cavities were then prepared with an ultrasonic retro-tip. the specimens were divided into three groups (n=12) and filled with MTA, ERRM putty or ERRM paste. Epoxy resin replicas from resected root-end surfaces and longitudinally sectioned roots were fabricated. The gaps at the material/dentin interface were measured using scanning electron microscope (SEM). Transversal, longitudinal and overall gap sized were measured for each specimen. The data were analyzed using the Kruskall-Wallis test.
Results: in transversal sections, no significant difference was found between MTA, ERRM putty and ERRM paste (P=0.31). However, in longitudinal sections, larger gaps were evident between the ERRM paste and dentinal walls compared to MTA and ERRM putty (P=0.002 and P=0.033, respectively). Considering the overall gap size values, the difference between three tested materials was not statistically significant (p=0.17).
Conculsion: within the limits of this study, the marginal adaptation of ERRM paste and putty was comparable to that of MTA. However, ERRM putty might be more suitable for filling the root-end cavities because of its superior adaption compared to ERRM paste in longitudinal sections
