“Comparative Study of Three Different Types of Root Canal Sealers” In vitro Study

Abstract

Recently, a new bioceramic root canal sealer was introduced in the market with claims of favourable physical and biological properties. So, the aim of the study was to compare seal ability, bond strength, sealer penetration, retreatability, and cytotoxicity of this sealer and the effect of incorporating Nano Bio active Glass to AH Plus Sealer against the gold standard sealer which is AH Plus. 120 freshly extracted human upper central incisors teeth with straight root canals were used in the study; they were examined to exclude any tooth with defects or cracks. The access cavities were opened. All teeth were instrumented with a crown-down technique, using a set of ProTaper rotary instruments to achieve a size # 40 apical preparation. Irrigation was performed using 3 mL of 2.6% NaOCl after every change of instrument. Following biomechanical preparation 17% EDTA was used for 1 min, followed by distilled water for 1 min. The specimens were divided into three main equal groups of 40 roots each according to testing material. Each group was further categorized into four test groups according to manoeuvres done.