Incidence of dentinal crack formation during root canal preparation with two NiTi instruments activated by adaptive motion and continuous rotation: An in vitro study
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info:eu-repo/semantics/openAccessAttribution-NonCommercial-NoDerivatives 4.0 Internationalhttps://creativecommons.org/licenses/by-nc-nd/4.0/Tarih
2019Üst veri
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Erkan, E., Olcay, K., Eyüboğlu, T. F. ve Gündoğar, M. (2019). Incidence of dentinal crack formation during root canal preparation with two NiTi instruments activated by adaptive motion and continuous rotation: An in vitro study. The European Research Journal, 5(5), 757-762. https://doi.org/10.18621/eurj.417982Özet
Objectives: The aim of this study was to evaluate dentin crack incidence after root canal instrumentation usingProTaper 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: PTNext with continuous rotation (n = 15); Group 2: PT Next with adaptive motion (n = 15); Group 3: TF Adaptivewith continuous rotation (n = 15); Group 4: TF Adaptive with adaptive motion (n = 15). Fifteen unpreparedteeth were used as control group. Crowns of the teeth were removed and roots were sectioned at 3, 6, and 9mm from the apex using a diamond saw. Finally root dentin pieces were evaluated under stereomicroscope atx25 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 levelof 9 mm and similarly in group 4 at 6 mm level. Group 3 showed a significantly higher dentin crack formationfollowed by Group 1, 2, 4 and control group respectively (p < 0.039). There was no significant differencebetween 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.
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The European Research JournalCilt
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