Assessment of Root Dentin Defect during Retreatment Procedure using Various NiTi Hand and Rotary Retreatment Files: An In vitro Study

Maneesha Das; Shruti Shivakumar; Asutosh Das; Shilpa Mailankote; Sachin Naik; Preethi Sathydevi

doi:10.4103/jpbs.jpbs_743_21

Assessment of Root Dentin Defect during Retreatment Procedure using Various NiTi Hand and Rotary Retreatment Files: An In vitro Study

J Pharm Bioallied Sci. 2022 Jul;14(Suppl 1):S573-S576. doi: 10.4103/jpbs.jpbs_743_21. Epub 2022 Jul 13.

Authors

Maneesha Das¹, Shruti Shivakumar², Asutosh Das³, Shilpa Mailankote⁴, Sachin Naik^{5

6}, Preethi Sathydevi⁷

Affiliations

¹ Department of Conservative Dentistry and Endodontics, Institute of Dental Sciences, Siksha 'O' Anusandhan (Deemed to be University), Bhubaneswar, Odisha, India.
² Department of Pedodontics and Preventive Dentistry, JSS Dental College and Hospital, JSS Academy of Higher Education and Research, Mysuru, Karnataka, India.
³ Department of Oral and Maxillofacial Surgery, Kalinga Institute of Dental Sciences, KIIT (Deemed to be University), Bhubaneswar, Odisha, India.
⁴ Department of Public Health Dentistry, AB Shetty Memorial Institute of Dental Sciences (ABSMIDS), Nitte (Deemed to be University), Mangalore, Karnataka, India.
⁵ Dental Biomaterials Research Chair, Dental Health Department, College of Applied Medical Sciences, King Saud University, Riyadh, Saudi Arabia.
⁶ Department of Public Health, Texila American University, Georgetown, Guyana, India.
⁷ Department of Conservative Dentistry and Endodontics, KMCT Dental College, Kozhikode, Kerala, India.

Abstract

Aim: The aim of the current study was to evaluate the radicular dentin defect during retreatment employed diverse NiTi hand and rotary retreatment file systems.

Materials and methods: Eighty mandibular premolars with a single root and root canal that were recently extracted were gathered and stored. The premolars were subject to decoronation at cementoenamel junction (CEJ) beneath irrigation with water to attain a uniform radicular length of 16 mm. Gutta-percha cones were covered with sealer and introduced into the root canal up to the working length. Eighty teeth were allocated at random into four groups with each group consisting of 20 samples. Group I: Control, Group II: EdgeFile XR retreatment rotary files, Group III: ProTaper Universal retreatment files, and Group IV: MTwo retreatment files. Under constant water cooling, the roots were cut flat with a diamond disc at apical third (3 mm), middle third (6 mm), and cervical third (9 mm) points. Stereomicroscope was employed to visualize the sections below × 20 magnification.

Results: A statistically significant difference was noted among the groups with respect to the formation of radicular dentinal defects at 3 mm (P < 0.01) and 6 mm (P < 0.001), while the sections at 9 mm did not exhibit any statistically significant difference (P > 0.598).

Conclusion: Despite the limitations in this study, it was concluded that all the evaluated file systems efficiently eliminated root canal filling during the retreatment. In addition, it was noted that the EdgeFile XR group exhibited fewer root dentin defects in comparison with the MTwo and ProTaper Universal group of files.

Keywords: EdgeFile XR; MTwo; ProTaper Universal; retreatment files; root dentin defect.