he Ability of Portland Cement, MTA, and MTA Bio to revent Through-and-Through Fluid Movement in epaired Furcal Perforations

H d bstract his study assessed the ability of Portland cement, hite Angelus–mineral trioxide aggregate (MTA), and TA Bio to seal furcal perforations in extracted human olar teeth. Fifty-five human mandibular molar teeth ere accessed, and the canal orifices were located. The oots were horizontally sectioned in the middle third. esin composite was used to fill the root canal orifices nd the apical end of the root. Perforations were creted in the center of the pulp chamber floor by using a ize 3 round bur. The teeth were divided into 3 groups n 15), and an additional 10 teeth served as controls. n G1, the perforation defects were repaired with MTA, hereas in G2 and G3, MTA Bio and Portland cement ere used, respectively. Each tooth was assembled in a ermetic cell to allow the evaluation of fluid filtration. eakage was measured by the movement of an air ubble traveling within a pipette connected to the eeth. Measurements of the air bubble movement were ade after 10 minutes at a constant pressure of 20 cm 2O. Kruskal-Wallis H test was applied to the fluid flow ata to detect differences between the experimental roups (P .05). Leakage existed in every sample and as very variable in all the experimental groups, rangng from 0.098–0.51 L/min. Kruskal-Wallis H-test reults showed that there was no significant difference in ean fluid flow between the experimental groups (P 874). The sealing ability promoted by the 3 cements as similar; no cement was able to produce a fluidight seal. (J Endod 2007;xx:xxx)