Incidence of dentinal crack formation during root canal preparation with two NiTi instruments activated by adaptive motion and continuous rotation: an in vitro study

Authors : Erhan ERKAN, Keziban OLCAY, Tan Fırat EYÜBOĞLU, Mustafa GÜNDOĞAR

Pages : 757-762

Doi:10.18621/eurj.417982

View : 16 | Download : 12

Publication Date : 2019-09-04

Article Type : Research Paper

Abstract :Objectives: The aim of this study was to evaluate dentin crack incidence after root canal instrumentation using ProTaper Next insert ignore into journalissuearticles values(PT Next; Dentsply Maillefer, Ballaigues, Switzerland); and Twisted File Adaptive insert ignore into journalissuearticles values(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 insert ignore into journalissuearticles values(n = 15);; Group 2: PT Next with adaptive motion insert ignore into journalissuearticles values(n = 15);; Group 3: TF Adaptive with continuous rotation insert ignore into journalissuearticles values(n = 15);; Group 4: TF Adaptive with adaptive motion insert ignore into journalissuearticles values(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 insert ignore into journalissuearticles values( p < 0.039);. There was no significant difference between groups at 6 mm and 9 mm levels insert ignore into journalissuearticles values( p = 0.497); except for only 3 mm level insert ignore into journalissuearticles values( 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.
Keywords : Dentinal crack, root canal preparation, protaper next, twisted file adaptive, nickel titanium instruments, adaptive motion, continuous rotation