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Influence of optimum torque reverse motion on dentinal cracks after root canal preparation with two nickel-titanium rotary systems.
- Source :
- Contemporary Clinical Dentistry; Apr-Jun2022, Vol. 13 Issue 2, p183-188, 6p
- Publication Year :
- 2022
-
Abstract
- Objectives: This study was aimed to evaluate the cause-effect relationship between canal preparation with ProTaper Next (PTN) and ProTaper Gold (PTG) using optimum torque reverse (OTR) motion or continuous rotation and dentinal crack formation. Materials and Methods: Fifty distobuccal roots of human maxillary first molars were divided into five groups; Group I: PTG Full rotation, Group II: PTG in OTR, Group III: PTN Full rotation, Group IV: PTN in OTR, Group V: unprepared (control group). After mechanical preparation, the distobuccal roots were sectioned horizontally at 3, 6, and 9 mm from the apex. Images were captured using a stereomicroscope at 25X to determine the presence or absence of dentinal cracks. Friedman test was used to compare between root sections followed by Wilcoxon signed-rank test for pairwise comparison. Kruskal–Wallis test was used to compare between tested rotary systems followed by pairwise comparison with Dunn Bonferroni correction (α = 0.05). Results: Crack development was significantly higher in PTG using OTR motion 36.7% followed by PTN using OTR 33.3%, while the control group showed no cracks. PTG and PTN with full rotation showed crack development with 23.3% and 13.3%, respectively. Conclusions: The type of motion kinematics used during mechanical preparation have an impact on dentinal crack formation. Nickel-titanium instruments with larger taper tend to induce more cracks. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 0976237X
- Volume :
- 13
- Issue :
- 2
- Database :
- Complementary Index
- Journal :
- Contemporary Clinical Dentistry
- Publication Type :
- Academic Journal
- Accession number :
- 157814369
- Full Text :
- https://doi.org/10.4103/ccd.ccd_1061_20