The ability of Portland cement, MTA, and MTA bio to prevent through-and-through fluid movement in repaired furcal perforations

This study assessed the ability of Portland cement, white Angelus-mineral trioxide aggregate (MTA), and MTA Bio to seal furcal perforations in extracted human molar teeth. Fifty-five human mandibular molar teeth were accessed, and the canal orifices were located. The roots were horizontally sectioned in the middle third. Resin composite was used to fill the root canal orifices and the apical end of the root. Perforations were created in the center of the pulp chamber floor by using a size 3 round bur. The teeth were divided into 3 groups (n = 15), and an additional 10 teeth served as controls. In G1, the perforation defects were repaired with MTA, whereas in G2 and G3, MTA Bio and Portland cement were used, respectively. Each tooth was assembled in a hermetic cell to allow the evaluation of fluid filtration. Leakage was measured by the movement of an air bubble traveling within a pipette connected to the teeth. Measurements of the air bubble movement were made after 10 minutes at a constant pressure of 20 cm H2O. Kruskal-Wallis H test was applied to the fluid flow data to detect differences between the experimental groups (P <.05). Leakage existed in every sample and was very variable in all the experimental groups, ranging from 0.098-0.51 mu L/min. Kruskal-Wallis H-test results showed that there was no significant difference in mean fluid flow between the experimental groups (P =.874). The sealing ability promoted by the 3 cements was similar; no cement was able to produce a fluid-tight seal.