الفهرس 
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Abstract
Introduction: The present study was designed to evaluate the effect of dentinal wall
ozone treatment on push-out bond strength and adaptability of resin based sealers.
Methods: A sample of forty sound human extracted teeth with single straight root canals
was prepared and assigned to experimental groups, designated as group 1, ozone
irrigation (n=20) and group 2, 2.5% NaOCl + 17% EDTA (n=20).
Further subgrouping is done according to obturating materials used into subgroup (A)
(n=10) AH-plus sealer+ gutta-percha and subgroup (B) (n=10) RealSeal sealer+ Resilon.
After the filling procedures, each tooth was prepared for push-out assessment by using
root slices of 2mm thickness, loading was performed on universal testing machine at a
speed of 0.5mm/min.
Mode of failure was determined using digital microscope.
Two-way ANOVA statistical analysis was performed.
Results: There was no significant difference between ozone and NaOCl groups
regardless the level of slice cut and obturating materials used.
AH-plus showed significantly higher bond strength than RealSeal group regardless the
level of slice cut and irrigating solutions used.
Conclusion: The bond strength of ozone group did not highly affect the bond strength of
the tested sealers compared to NaOCl group. Bond strength of AH-plus is still better than
that of RealSeal group which is manifested more in the NaOCl group.