نتایج جستجو برای: niti files

تعداد نتایج: 31475  

Journal: :iranian endodontic journal 0
azza a dafalla lecturer of conservative dentistry, school of dentistry, africa university of medical science, khartoum, sudan neamat hassan abu-bakr department of conservative dentistry, faculty of dentistry, university of khartoum, khartoum, sudan yahia e ibrahim department of conservative dentistry, faculty of dentistry, university of khartoum, khartoum, sudan

introduction: the aim of the present study was to compare hand stainless steel k-files and nickel-titanium profile 0.04 taper 29 series rotary instruments for their efficiency, procedural errors and time consumed in preparation of root canal system. materials and methods: a total of 46 maxillary and mandibular first premolars extracted for orthodontic purposes were collected (two contralateral ...

Journal: :Restorative Dentistry & Endodontics 2015

2013
HUIMIN ZHOU BIN PENG YU-FENG ZHENG

Differences in mechanical properties between endodontic instruments might be related to the chemical composition, phase constitution, or fabrication process of nickel–titanium (NiTi) endodontic instruments. An awareness and knowledge of the mechanical properties of NiTi endodontic files and their association with the metallurgical properties is useful for clinicians to understand the behavior o...

Journal: :Journal of endodontics 2011
Luca Testarelli Gianluca Plotino Dina Al-Sudani Valentina Vincenzi Alessio Giansiracusa Nicola M Grande Gianluca Gambarini

INTRODUCTION The aim of the present study was to evaluate the bending properties of Hyflex instruments, which exhibit a lower percent in weight of nickel (52 Ni %wt) and compare them with other commercially available nickel-titanium (NiTi) rotary instruments. METHODS Ten instruments with tip size 25, 0.06 taper of each of the following NiTi rotary instrumentation techniques were selected for ...

Journal: :Journal of endodontics 2012
Hyeon-Cheol Kim Sang-Won Kwak Gary Shun-Pan Cheung Dae-Hoon Ko Se-Min Chung WooCheol Lee

INTRODUCTION The use of reciprocating movement was claimed to increase the resistance of nickel-titanium (NiTi) file to fatigue in comparison with continuous rotation. Recently 2 new brands of NiTi files have been marketed for use in a RM mode. The purpose of this study was to compare the cyclic fatigue resistance and torsional resistance of these 2 files, Reciproc and WaveOne. METHODS Cyclic...

Journal: :The journal of contemporary dental practice 2013
Surbhi Kakar Anil Dhingra Himanshu Sharma

AIM To assess and compare the shaping potential of manual NiTi K-files and Rotary ProTaper instruments in narrow canals using CT. OBJECTIVE To assess the shaping potential of manual NiTi K-files and Rotary ProTaper and analyzing the final outcome of shaped canals using CT and determining different variables, like • Working time • Change in volume • Change in cross-sectional area. MATERIALS ...

Journal: :International endodontic journal 2011
G S P Cheung E W Zhang Y F Zheng

AIM To evaluate the bending fatigue lifetime of nickel-titanium alloy (NiTi) and stainless steel (SS) endodontic files using finite element analysis. METHODOLOGY The strain-life approach was adopted and two theoretical geometry profiles, the triangular (TR) and the square cross-sections, were considered. Both low-cycle fatigue (LCF) lifetime and high-cycle fatigue (HCF) lifetime were evaluate...

Journal: : 2023

In recent years, thanks to the rapid advancement of science and technology a better understanding anatomy root canal system, many new endodontic instruments materials have been introduced with desire minimize complications in process preparing canal, help cleaning shaping complete well. It is noteworthy that emergence files made Nickel-Titanium alloy (NiTi files), which, according recommendatio...

2017
Alberto Dagna Rashid El Abed Sameeha Hussain Ibrahim H Abu-Tahun Livia Visai Federico Bertoglio Floriana Bosco Riccardo Beltrami Claudio Poggio Hyeon-Cheol Kim

Objectives This study compared the amount of apically extruded bacteria during the glide-path preparation by using multi-file and single-file glide-path establishing nickel-titanium (NiTi) rotary systems. Materials and Methods Sixty mandibular first molar teeth were used to prepare the test apparatus. They were decoronated, blocked into glass vials, sterilized in ethylene oxide gas, infected ...

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