Affiliation:
1. Aesthetic and restorative dentistry department, College of Dentistry, University of Baghdad, Baghdad, Iraq.
Abstract
Objectives: Successful endodontic treatment outcome requires effective shaping and cleaning of root canals. This study aims to evaluate the smear layer removal after continuous chelation (CC) ) NaOCL\HEDP( and sequential chelation (SC) )NaOCL\EDTA( and their influence on the push-out bond strength (POBS) of Bio-C sealer.
Materials and Methods: Palatal roots of the maxillary first molar (n=72) were divided into four groups (n=18) as follows: 3% NaOCL, SC: 3% NaOCL followed by 17% EDTA, CC: 3% NaOCL \9% HEDP and Distilled water. Thirty-two roots (n=8/group) were split longitudinally for smear layer evaluation using SEM. Forty roots were obturated with Guttapercha and Bio-C sealer using a single cone technique. Three sections were taken horizontally from the coronal, middle, and apical third (1.5±0.1 mm thickness) for the push-out test using a universal testing machine. The Kruskal-Wallis and Mann-Whitney tests were used to analyze the SEM data, while the One-way analysis of variance (ANOVA) test and the Tukey test were used to analyze POBS data. Z test to compare failure mode.
Results: There was no difference between SC and CC in the smear layer removal at all thirds (p>0.05). The POBS in CC was significantly higher than SC in all thirds (p
Reference38 articles.
1. 1. Mounes B, Alhashimi R. The push out bond strength of bioceramic sealer (Total Fill) after warm and cold obturation techniques an in vitro comparative study. J Baghdad Coll Dent 2022; 34 :7-16.
2. 2. Kandaswamy, D., & Venkateshbabu, N. Root canal irrigants. J Conserv Dent 2010 ;13: 256–264.
3. 3. Polineni, S., Bolla, N., Mandava, P., Vemuri, S., Mallela, M. & Gandham, V. M. Marginal adaptation of newer root canal sealers to dentin: a SEM study. J Conserv Dent 2016; 19:360-363.
4. 4. Al-Khafaji HA, Al-Huwaizi HF. Cleaning efficiency of root canals using different rotary instrumentation systems: a comparative in vitro study. Int J Med Res Health Sci 2019;8:89-93.
5. 5. Abu Al-Timan, J. A., Al-Huwaizi, H. F. & Abed, H. H.. The Effectiveness of Chelating Property of Chitosan Nanoparticles on Dentin. Ind J Public Health Res Dev 2019; 10: 1088-1093.