Incidence of dentinal crack formation during root canal preparation with two NiTi instruments activated by adaptive motion and continuous rotation: an in vitro study
Journal Title: The European Research Journal - Year 2019, Vol 5, Issue 5
Abstract
Objectives: The aim of this study was to evaluate dentin crack incidence after root canal instrumentation using ProTaper Next (PT Next; Dentsply Maillefer, Ballaigues, Switzerland) and Twisted File Adaptive (TF Adaptive; Sybron Endo, Orange, California, USA) at different kinematics. Methods: Sixty human extracted premolar teeth were selected and divided into 4 main groups. Group 1: PT Next with continuous rotation (n = 15); Group 2: PT Next with adaptive motion (n = 15); Group 3: TF Adaptive with continuous rotation (n = 15); Group 4: TF Adaptive with adaptive motion (n = 15). Fifteen unprepared teeth were used as control group. Crowns of the teeth were removed and roots were sectioned at 3, 6, and 9 mm from the apex using a diamond saw. Finally root dentin pieces were evaluated under stereomicroscope at x25 magnification. Digital images were evaluated by 2 researchers. Results: No cracks were observed in the control group. In groups 2 and 4 no fracture was observed at the level of 9 mm and similarly in group 4 at 6 mm level. Group 3 showed a significantly higher dentin crack formation followed by Group 1, 2, 4 and control group respectively (p < 0.039). There was no significant difference between groups at 6 mm and 9 mm levels (p = 0.497) except for only 3 mm level (p < 0.035). Conclusions: It was concluded, both adaptive motion and continuous rotationpromoted dentinal defect. Adaptive motion produced less dentinal defects all dentin levels but there was no significant difference.
Authors and Affiliations
Erhan Erkan, Keziban Olcay, Tan Fırat Eyüpoğlu, Mustafa Gündoğar
Keywords
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- EP ID EP628140
- DOI 10.18621/eurj.417982
- Views 84
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