Methods: In the current research, 2% Zeolite as Clinoptilolite was mixed mechanically with MTA and then mixed according to manufacturer's instrcutions. In this part, Root-end cavities were filled with white MTA plus Clinoptilolite in the experimental groups. In the control groups, root-end cavities were filled just with MTA. Microleakage was evaluated by using bovine serum albumin.
Results: The evaluation was conducted at 24-hour intervals for 30 days. Data were analyzed by using SPSS software. The earliest bovine serum albumin microleakage was observed in control group. There was a significantly longer time necessary for leakage to occur in experimental group (P<.000).
Conclusions: Chemical reaction between MTA and Zeolite must be addressed and may amend the leakage properties of endodontic cement. The present study confirmed that adding 2% Zeolite as Clinoptilolite may improve the sealing properties of MTA cement.