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The Effect of Apical Preparation Size on the Removal of Smear Layer and Organic Debris from Root Canal Wall: An In-vitro Scanning Electron Microscopic Study

Document Type: Original Article

Pragya Singhal , Deepak Raisingani , Ashwini B Prasad , Deeksha Khurana, Harshit Srivastava , Siddhi Dhadda
Post Graduate, Professor and Head, Professor, Senior Lecturer, Reader, Department of Conservative Dentistry and Endodontics, Mahatma Gandhi Dental College and Hospital, Jaipur, Rajasthan, India

DOI : 10.37821/ruhsjhs.8.2.2023.484 [Downloaded: 0 times], [Page visited: 0 times]

DOAJ : https://doaj.org/article/a66a43b4323b48709c2d0adc0b7ecb44

Introduction: The study aims to evaluate the effect of apical preparation size on the removal of the smear layer and organic debris from the root canal wall. Methodology: Thirty freshly extracted single-rooted teeth with comparable root canal morphology were selected. Chemo-mechanical preparation of root canals was done with hand K-files up to 20/0.02 and samples were randomly divided into three groups of 10 specimens each, Group-A (control group): Without further chemomechanical preparation; Group-B: Final chemomechanical preparation with rotary nickel-titanium files up to 25/0.04; Group-C: Final chemomechanical preparation with rotary nickel-titanium files up to 30/0.04. Copious irrigation was done with 17% ethylene diamine tetra acetic acid and 5.25% sodium hypochlorite. The data were analyzed via the Mann-Whitney U test with the help of SPSS 17 statistical software. Results: A significant reduction of the smear layer and organic debris was observed when prepared with rotary nickel-titanium files to a final apical size of 30/0.04 compared to the final apical size of 25/0.04 in the apical third. Conclusion:Increasing the size of the apical preparation to 30/0.04 greatly improved the cleanliness of the root canal walls.

Root canal irrigants, Root canal preparation, Scanning electron microscopy, Smear layer