sealing ability of orthograde mta and cem cement in apically resected roots using bacterial leakage method

introduction: the aim of this in vitro study was to determine the sealing ability of orthograde proroot mineral trioxide aggregate (mta) and calcium enriched mixture (cem) cement as root-end filling materials. materials and methods: fifty four extracted single-rooted human teeth were used. the samples were randomly divided into 3 experimental groups. in group a and b, 4 mm of wmta and cem cement were placed in an orthograde manner and 3 mm of apices were resected after 24 hours. in group c the apical 3 mm of each root was resected and the root-end prepared with ultrasonic tips to a depth of 3 mm and subsequently, then filled with mta. the apical sealing ability was performed with bacterial leakage method. statistical analysis was carried out with chi-square test. results: there were no significant differences in the extent of bacterial leakage between the three experimental groups ( p >0.05). conclusion: based on the limitations of this in vitro study, we concluded that mta and cem cement can be placed in an orthograde manner when there is a potential need for root-end surgery.