effect of the of zeolite containing silverzinc nanoparticles on the push out bond strength of mineral trioxide aggregate in simulated furcation perforation

Statement of the problem: recently, zeolite has been regarded to improve the properties of dental materials such as mineral trioxide aggregate (mta).purpose: the aim of the present study was to evaluate the effect of incorporating zeolite/silver/zinc (ze/ag/zn) composite at 2 wt% to mta powder on the pushout bond strength in simulated furcation perforations.materials and method: furcal perforations, measuring 1.3 mm in diameter and 2 mm in height, were simulated in 40 human mandibular first molars. the samples were allocated to two groups (n=20) based on the material used for the repair of perforations. in the group 1, mta and in the group 2, mta plus ze/ag/zn (2%) was used. the samples were incubated at 37°c for 1 week. then the universal testing machine was employed to measure bond strength. the resistance of materials to dislodgment was recorded in mpa. data were analyzed using ttest. statistical significance was set at p < 0.05.results: the pushout bond strength in the group 1 (6.40±1.98 mpa) was significantly higher than that in the group 2 (2.1±0.6 mpa) with p= 0.001.conclusion: under the limitations of the present study, it can be concluded that incorporation of ze/ag/zn at 2 wt% to mta powder had a negative effect on the pushout bond strength.