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Document Type

Original Study

Abstract

Purpose: EndoSeal MTA sealer push-out bond strength was evaluated after using Chitosan and Nano-Chitosan as the final rinse. Materials & methods: Universal ProTaper rotary device was utilized to instrument 28 natural human single rooted lower bicuspid teeth, followed by one minute irrigation by 2.6% sodium hypochlorite. All samples were classified randomly into four main groups [n=7] as per the utilized final rinse; Group S: Normal saline, Group E: 17%EDTA, Group CH: 0.2% Chitosan, Group CNP: 0.2%Nano-Chitosan. The final rinse was standardized to be 5ml/ 3min for each solution. Obturation of all samples was carried out with ProTaper GP and EndoSeal MTA sealer, then placed in a humidifier for 1week. All roots were sectioned into horizontal slices of 2 mm thickness and immersed in self-curing acrylic resin. The samples were put through a push-out test with a 0.5mm/min loading speed. Data was statistically analyzed. Results: The chitosan at the coronal level (Group CH) showed the greatest push-out bond strength, followed by groups CNP, EDTA and S with statically significant difference (P value< 0.05) among all tested groups versus the control one. While at the apical level the highest push out bond strength was observed in EDTA group followed by groups CH, CNP and S with statically significant difference between all the tested groups versus the control one. Conclusion: Chitosan and its Nano counterpart have a comparable result to EDTA irrigant solution. Different chelating agents can greatly influence EndoSeal sealer push-out bond strength.

Keywords

EndoSeal MTA, Nano-Chitosan, Push-out.

Subject Area

Restorative Dentistry Issue (Removable Prosthodontics, Fixed Prosthodontics, Endodontics, Dental Biomaterials, Operative Dentistry)

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