Results 21 to 30 of about 1,383,987 (149)

Assessment of cyclic fatigue resistance of Protaper Next and WaveOne Gold in different kinematics

Bulletin of the National Research Centre, 2020
Background The purpose of the current study was to inspect and compare the influence of applying continuous rotation and reciprocation motions on the cyclic fatigue resistance of Protaper Next (PTN) file (X2) and WaveOne Gold (WOG) Primary file in ...
Amira Galal Ismail, Manar Galal, Nehal Nabil Roshdy   +2 more
doaj   +1 more source

Structural Design and Performance Study of a Reciprocating Vortex Ring Generator [PDF]

Journal of Applied Fluid Mechanics, 2023
Vortex rings can maintain their structure during motion and achieve long-distance transport with low energy consumption, which is a fluid transport method with great energy-saving potential.
M. L. Zhou, D. Han, L. Zhu, S. Y. Yu, Y. F. Gao, Q. L. Shi, W. F. He   +6 more
doaj   +1 more source

Mathematical model of dynamics of moving objects based on quaternions

Технічна інженерія, 2019
One of the main tasks of managing groups of dynamic moving objects is to ensure their consistent movement in space. It is advisable to optimize the movements (motion) in space using mathematical models i.e. systems of equations of motion.
I.V. Puleko
doaj   +1 more source

Development of Refined Electromagnetic Models of Reciprocating Electric Generators with Permanent Magnets

Известия высших учебных заведений и энергетических объединенний СНГ: Энергетика, 2021
The analysis of scientific papers devoted to the mathematical description of electric generators of reciprocating motion with permanent magnets demonstrated that the proposed mathematical models of this type of generators are based on the theory of ...
A. B. Menzhinski, A. N. Malashin, P. B. Menzhinski   +2 more
doaj   +1 more source

Reciprocating motion of active deformable particles

, 2016
Reciprocating motion of an active deformable particle in a homogeneous medium is studied theoretically. For generality, we employ a simple model derived from symmetry considerations for the center-of-mass velocity and elliptical and triangular ...
M. Tarama, T. Ohta
core   +1 more source

Flexural Fatigue of Unicone, Navigator Evo and Protaper Next Files in Reciprocate and Continuous Rotary Systems in Simulated Curved Canals—An In Vitro Study

Metals, 2019
This study investigated the cyclic fatigue resistance of three brands of nickel-titanium rotary files—Unicone (size 25 0.06; Medin), Navigator Evo (W-4; size 25 0.06; Medin) and Protaper Next (X2; size 25 0.06 Dentsply Tulsa Dental)—in ...
Saeed Alqahtani, Mohammad Al-Omari, Ayodeji Oluwadare Olarinmoye, Ali Alrahlah   +3 more
doaj   +1 more source

The Effect of Different File Motions on the Formation of Apical Debris During Root Canal Preparation In vitro

Journal of Pharmacy and Bioallied Sciences
Background: After root canal preparation, apical debris may cause discomfort and delayed healing. Rotary, reciprocating, and adaptive file movements affect debris extrusion.
Athul B. Kurian, Tansha, Rubal Singh, Raman Mishra, Ashtha Arya, Smitha Reddy   +5 more
doaj   +1 more source

Fracture resistance of endodontically treated teeth using ProTaper NEXT rotary and R-Motion reciprocating file systems [PDF]

Journal of Dental Materials and Techniques
Objective: This study compared the fracture resistance of mandibular premolars instrumented using the ProTaper NEXT rotary and R-Motion reciprocating nickel-titanium file systems.Methods: In this in vitro study, 45 extracted single-rooted mandibular ...
Tashmeem Mohammad, Praveen Dalavai, Venkata Karteek Varma Penmetsa, Madhu Varma Kanumuri, Durga Bhavani Panithini, Sahithya Gunda   +5 more
doaj   +1 more source

Influence of endodontic motors on the behaviour of root canal shaping instruments: an in vitro comparative study

BDJ Open, 2023
Aims The endodontic literature reports a lot of comparative study on endodontic instruments, concerning as well their geometry, instrumental dynamics, material, mechanical behavior or heat treatment. However, to our knowledge, no study has focused on the
Clémentine Reynette, Renaud Giess, Jeanne Davril, Jean-Marc Martrette, Éric Mortier, Rémy Balthazard, Marin Vincent   +6 more
doaj   +1 more source

Evaluation of root dentinal damage associated with protaper gold, waveone gold, and protaper next during cleaning and shaping procedures: An In vitro analysis

Journal of Pharmacy and Bioallied Sciences, 2021
Aim: The purpose of this study is to evaluate and compare the incidence of dentinal defects after root canal shaping using rotary nickel-titanium (Ni-Ti) instruments (ProTaper Gold [PTG] and ProTaper Next [PTN]) and reciprocating instrument (WaveOne Gold
Sarin Koroth, K C Ponnappa, Elsy P Simon, Subin Bharath, V J Vivek, Chandini Raveendran   +5 more
doaj   +1 more source