An In Vitro Comparison of Microleakage of White Pro Root MTA and Root MTA in Retro Grade Cavity

This study was aimed to evaluate and compare the amount of microleakage of two types of root end filling materials, white Pro Root MTA (Dentsply) and Iranian MTA (Root MTA).Methods and Materials: In this laboratory study, 34 extracted single root and canal human teeth were selected. Root canals were cleaned, shaped and obdurate. Experimental samples were divided randomly in to 2 groups of 15 specimens. Root tips were sectioned in perpendicular angel and root end cavities were prepared. In first group, white Pro Root MTA and in second group, Root MTA was used as root end filling material. 4 residual teeth were divided into two positive and negative control groups. After setting of root end filing materials, the teeth were covered with two layers of nail polish except around the root filling materials and then were submerged in Indian Ink solution for 48 hours. After rinsing, the teeth were splited in buccolingual direction. Dye penetration was observed and evaluated by three observers with steriomicroscope at 16× magnification. Data were analyzed and the means were compared using Mann Whitney U test. Due to the obtained mean of microlaeakage (0.61 mm for first and 0.57 mm for second group), there was no significant difference between the two groups; So, the sealing ability of two types of MTA as root end filling material was similar. We found that use of Root MTA, compared to Pro Root MTA due to its lower cost and easier availability is recommended.