Effects of root canal curvature and mechanical properties of nickel–titanium files on torque generation

Author(s):  
Sang Won Kwak ◽  
Jung-Hong Ha ◽  
Ya Shen ◽  
Markus Haapasalo ◽  
Hyeon-Cheol Kim
2020 ◽  
Vol 46 (11) ◽  
pp. 1758-1765
Author(s):  
Mariana Mena Barreto Pivoto-João ◽  
Mario Tanomaru-Filho ◽  
Jader Camilo Pinto ◽  
Camila Galletti Espir ◽  
Juliane Maria Guerreiro-Tanomaru

2017 ◽  
Vol 43 (10) ◽  
pp. 1706-1710 ◽  
Author(s):  
Daisuke Tokita ◽  
Arata Ebihara ◽  
Miki Nishijo ◽  
Kana Miyara ◽  
Takashi Okiji

2019 ◽  
Vol 45 (1) ◽  
pp. 68-72.e1 ◽  
Author(s):  
Keiichiro Maki ◽  
Arata Ebihara ◽  
Shunsuke Kimura ◽  
Miki Nishijo ◽  
Daisuke Tokita ◽  
...  

Metals ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 1014 ◽  
Author(s):  
Gururaj Parande ◽  
Vyasaraj Manakari ◽  
Saif Wakeel ◽  
Milli Kujur ◽  
Manoj Gupta

The present study focuses on investigating the effects of Nickel-Titanium (NiTi) nanoparticles on the microstructure and properties of pure Mg. Mg composites containing varying weight percentages (0.5, 1, 1.5, 3) of NiTi nanoparticles were fabricated using Disintegrated Melt Deposition (DMD), followed by hot extrusion. The synthesized materials were characterized in order to investigate their physical, microstructural and mechanical properties. Synthesized materials were characterized for their density and porosity levels, microstructural characteristics, and mechanical response. Superior grain refinement was realized by the presence of NiTi nanoparticles in the magnesium matrix. The addition of NiTi nanoparticles resulted in strength property enhancements of pure Mg with minimal adverse effect on the ductility. Structure-property evaluations are detailed in the current study.


2019 ◽  
Vol 13 (1) ◽  
pp. 57-60
Author(s):  
Damla Özsu Kırıcı ◽  
Ertuğrul Karataş ◽  
Ahmet Demirhan Uygun ◽  
Ezgi Doğanay Yıldız ◽  
Kezban Meltem Çolak ◽  
...  

Background. The aim of the present study was to compare the cyclic fatigue resistance of novel nickel titanium rotary pathfinding instruments. Methods. Twenty instruments were selected for each file system. A simulated stainless steel root canal, with a 90° angle of curvature and a curvature radius of 3 mm, was used for cyclic fatigue test of the ProGlider (#16, progressive taper: 0.02‒ 0.085), PathGlider (#15, taper: .03), and One G (#14, taper: .03) instruments. Statistical analyses were performed with oneway ANOVA (P=0.05). Post hoc Tukey tests were used to determine any statistically significant differences between the groups. Results. The ProGlider instruments exhibited significantly more cyclic fatigue resistance than both PathGlider and One G instruments (P<0.001). One G instruments had significantly more resistance to fracture than PathGlider instruments (P<0.05). Conclusion. ProGlider instruments had better cyclic fatigue resistance than PathGlider and One G instruments.


2020 ◽  
Vol 9 (51) ◽  
pp. 3894-3897
Author(s):  
Shreyal Ninad Deshmukh ◽  
Vanitha Umesh Shenoy ◽  
Sumanthini Venkatsubramanyam Margasahayam ◽  
Anuradha Bhausaheb Patil ◽  
Jimish Rajiv Shah

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