الفهرس | Only 14 pages are availabe for public view |
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. |