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. 2021 Jan-Mar;12(1):14-20.
doi: 10.4103/ccd.ccd_31_20. Epub 2021 Mar 20.

Comparative Assessment of Canal Transportation, Dentin Loss, and Remaining Root Filling Material by Different Retreatment Files An In vitro Cross-Sectional Study

Afzal Ali  1 , Prahlad Saraf  2 , Laxmikant Kamatagi  2 , Sandhya Khasnis  2
Affiliations

Comparative Assessment of Canal Transportation, Dentin Loss, and Remaining Root Filling Material by Different Retreatment Files An In vitro Cross-Sectional Study

Afzal Ali et al. Contemp Clin Dent. 2021 Jan-Mar.

Abstract

Aim: The purpose of this study was to evaluate the centering ability, canal transportation and efficacy of re-treatment rotary and hand files in removing Gutta Percha from root canals using Cone Beam Computed Tomography(CBCT).

Materials and methods: Sixty extracted human maxillary anteriors were obturated and randomly divided into three groups. Root fillings were removed with ProTaper Universal retreatment system, R-Endo system, and Hedstrom files. CBCT scans were taken.

Statistical analysis and results: The data were analyzed using the Statistical Package for the Social Sciences (SPSS 15.0, IBM). The mean and standard deviation among the groups was calculated by one-way analysis of variance, Kruskal-Wallis, and Mann- Whitney U-tests, and the comparison among the various groups was done by post hoc Tukey's test. A statistically significant amount of remaining root canal filling material and canal transportation was noted (P < 0.05).

Conclusion: No system completely removed the root filling material from root canals. Manual instrumentation resulted in more dentin loss and canal transportation than rotary file system.

Keywords: Canal transportation; ProTaper Universal retreatment files; R-Endo retreatment files; cone-beam computed tomography; nickel–titanium.

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Conflict of interest statement

There are no conflicts of interest.

Figures

Figure 1
Figure 1
Three-dimensional reconstructed axial view of coronal (a, e, and i), middle (b, f, and j), and apical third (c, g, and k) of root canal and sagittal view of root canal showing remaining gutta-percha or sealer (d, h, and l)
Figure 2
Figure 2
Three-dimensional reconstructed axial view showing canal transportation at coronal (a, d, and g), middle (b, e, and h), and apical (c, f, and i) third of root canals
Figure 3
Figure 3
Schematic representation showing normal canal morphology (a), ledge formation (b), canal transportation (c) and perforation (d)
See this image and copyright information in PMC

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