EVALUATION OF SEALING ABILITY AND PUSH-OUT BOND STRENGTH OF DIFFERENT SEALERS (AN IN VITRO STUDY)
*Ahmed Zaki Mamdouh Sallam, Prof. Dr. Ehab Elsayed Hassanien, Dr. Mohamed Mokhtar Nagi
Background: Choosing an endodontic sealer for clinical use is a decision that contributes to the long-term success of NSRCT. The long-term success of endodontic therapies relies on complete filling after root canal obturation. Microleakage is one of the significant causes for endodontic failure, which occurs due to poor contacts between the gutta-percha and the seal-er, the sealer and the dentin, or through voids within the sealer. Aim of the Study: This study evaluated the sealing ability and push out bond strength of root Epoxy resin-based sealer (ADseal), Two bioceramic based sealers (CeraSeal bioceramic sealer) (Ceramoseal bioceramic sealer) and zinc-oxide based sealer (Zical). Materials and Methods: This study established on 60 extracted sound human single rooted premolars teeth with straight roots and single root canal were collected from the outpatient clinic in Oral Surgery department at Faculty of Dentistry, Ain Shams University. By inspection under magnification, teeth with severe attrition, root caries, external root resorption or cracks were excluded. The samples were classified into four main groups according to the obturation sealer: group I (n=16): ADseal sealer, group II (n=16): CeraSeal sealer, group III (n=16): Ceramoseal sealer, group IV (n=16): Zinc-oxide sealer. Each group were subdivided into two subgroups with 8 samples in each subgroup according to the method of evaluation: subgroup A (n=8): Sealing ability, subgroup B (n=8): Push-out bond strength. Results: Regarding the sealing ability test, there was no significant difference among the different types of sealers at 1 day and at 1 week. Regarding intergroup comparison, there was no significant difference within the same group at 1 day and 1 week in ADSeal sealer group Ceraseal sealer group, Ceramoseal sealer Zical sealer group. Regarding Push out test, there was no significant difference at corneal section between ADSeal, Ceraseal, Ceramoseal, and Zical. There was no significant difference at middle section between ADSeal, Ceraseal, Ceramoseal, and Zical, and apical section between ADSeal, Ceraseal, Ceramoseal, and Zical group. There was no significant difference between corneal section, middle and apical section at ADSeal, Ceraseal, Ceramoseal, and Zical. Conclusion: From the findings of this in vitro study, the following conclusions can be drawn under the sealing ability was comparable between ADSeal, Ceraseal, Ceramoseal and Zical sealer in 1day and 1 week, the push out technique was comparable between ADSeal, Ceraseal, Ceramoseal and Zical sealer in 1day and 1 week, sealing ability and push out bond strength are strongly correlated with each other.
Keywords: Sealing Ability, Push-out Bond Strength, Sealers.
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