1. Comparative evaluation of dentinal crack formation after root canal preparation using ProTaper Next, OneShape and Hyflex EDM.
- Author
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Das, Sanjib, Pradhan, Prasanti Kumari, Lata, S., and Sinha, Sachidananda Prasad
- Subjects
DENTAL materials ,DENTAL pulp cavities ,MICROLEAKAGE (Dentistry) ,DENTAL care ,TOOTH roots - Abstract
Introduction: The purpose of this study was to compare the incidence of dentinal crack formation after root canal preparation using ProTaper Next, OneShape and Hyflex electrodischarge machining (HEDM). Materials and Methods: A total of 75 extracted mandibular premolars were selected. The root canals were instrumented using ProTaper Next, OneShape and HEDM rotary files. All roots were horizontally sectioned at 3, 6 and 9 mm from apex with slow-speed saw under water cooling. The sections were observed under a stereomicroscope at x25 to determine the absence or presence of crack. Data were analyzed using post hoc test and one-way ANOVA. Results: ProTaper Next and HEDM produced significantly less cracks than OneShape. Conclusion: Within the limitation of this in vitro study, it can be concluded that nickel-titanium instruments may cause cracks on the root surface. ProTaper Next and HEDM tend to produce less number of cracks as compared to OneShape. [ABSTRACT FROM AUTHOR]
- Published
- 2018
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