Results 101 to 110 of about 48,553 (245)

Effect of Kinematics and Speed on Filling Material Removal, Canal Transportation, and Apical Extrusion During Retreatment of Curved Canals

Australian Endodontic Journal, EarlyView.
ABSTRACT This study evaluated the effects of kinematics (reciprocating vs. continuous rotation) and rotational speed (350 vs. 1200 rpm) on filling removal, canal transportation, and apical extrusion during retreatment of curved root canals. Vertucci type II mesial roots of mandibular molars were prepared, filled, and scanned by micro‐computed ...
Jenny Guerrero, Josué Fernández, Flávio R. F. Alves, José C. Provenzano, Karen M. Brisson‐Suárez, Marília F. Marceliano‐Alves, Isabela N. Rôças, José F. Siqueira Jr   +7 more
wiley   +1 more source

Evaluation and comparison of microbial colonization on nickel titanium (NiTi) closed coil springs and active tie-backs during orthodontic space closure: An in-vivo study

Journal of Orthodontic Science
OBJECTIVE: Literature suggests that the mode of ligation and use of elastomeric chains for achieving orthodontic space closure may result in a significant increase in microbial colonisation.
Genoey George, K. Jithesh Kumar, K. Anjali, Steve M. Jacob, G. Manas, Abhishek Singh Nayyar   +5 more
doaj   +1 more source

Discuss the Rationale for Minimally Invasive Endodontics and the Merits and Demerits of the Concept

Australian Endodontic Journal, EarlyView.
ABSTRACT Minimally invasive endodontics (MIE) places emphasis on the conservation of sound tooth structure and viable pulp tissue during endodontic procedures such as root canal treatment (RCTx) and vital pulp therapy (VPT). The use of minimal access cavity designs and conservative canal preparation dimensions have been investigated as a way to improve
Iris Mohan Li
wiley   +1 more source

Mechanical and Metallurgical Evaluation of Four Rotary Nickel‐Titanium File Systems: A Multimethod Study

International Endodontic Journal, EarlyView.
ABSTRACT Aim To compare four rotary nickel‐titanium (NiTi) file systems (Endostar E3 Azure, Endostar E3, VDW.ROTATE, and Mtwo) using a multimethod approach to evaluate their mechanical and metallurgical properties. Materials and Methods Endostar E3 Azure, Endostar E3, VDW.ROTATE, and Mtwo (all size 25/0.06 with an S‐shaped cross‐section; 52 instruments
Doğuş Bayraktar, Uğur İnan
wiley   +1 more source

Compressive behavior of NiTi-based composites reinforced with alumina nanoparticles

, 2018
NiTi alloys are extensively used in various industrial applications. However, to enhance the performance of this alloy in applications, its mechanical properties should be improved.
Ahn, DH, Akbarpour, MR, Kim, HS, Farvizi, M   +3 more
core   +1 more source

Clinical Outcome of Non‐Surgical Endodontic Treatment Performed by Undergraduate Dental Students: A Retrospective Observational Cohort Study

International Endodontic Journal, EarlyView.
ABSTRACT Aim To evaluate the outcome of pulpectomy, root canal treatment (RCT) and orthograde retreatment in permanent teeth performed by undergraduate dental students and to assess the influence of various variables. Methodology Electronic dental health records at the Department of Odontology, University of Copenhagen, Denmark were analysed covering ...
S. Ramezanzade, A. Bakhshandeh, B. Ibragimov, H. Fransson, T. Dascalu, A. Alonso, V. Anastasopoulou, EndoReCo, L. Bjørndal, V. S. Dawson, H. Fransson, F. Frisk, T. Kvist, M. Markvart, F. Mota de Almeida, M. Pigg, D. Sebring, E. Wigsten, L. Bjørndal   +18 more
wiley   +1 more source

Comparison of Uncovered and Covered Biliary SEMS for the Salvage of Obstructed SEMS: A Multicenter Retrospective Propensity Score–Weighted Study

Journal of Gastroenterology and Hepatology, EarlyView.
In patients undergoing secondary SEMS placement after initial uncovered stent failure, fully covered and uncovered SEMSs showed comparable patency, survival, and safety. However, mechanisms of recurrent biliary obstruction differed by stent type, with tumor ingrowth in uncovered SEMSs and sludge or food impaction in fully covered SEMSs.
Ho Seung Lee, Gunn Huh, Sung Hyun Cho, Dongwook Oh, Jae Min Lee, Tae Jun Song, Hoonsub So, Hong‐Sik Lee, Dong‐Wan Seo   +8 more
wiley   +1 more source

In-situ investigation of dynamic deformation in NiTi shape memory alloys under laser induced shock

, 2017
The free surface particle velocity of NiTi target shocked with a pulsed laser beam was measured with a photonic Doppler velocimetry (PDV) system to study the dynamic deformation behavior of NiTi alloys at ultra-high strain rate of 10(6)similar to 10(7)/s.
夏伟光, 王曦, 黄晨光, 魏延鹏, Wang, X (reprint author), Beijing Jiaotong Univ, Sch Mech Elect & Control Engn, Beijing 100044, Peoples R China., 吴先前, Chenguang Huang, Yanpeng Wei, Weiguang Xia, Xianqian Wu, Xi Wang   +10 more
core   +1 more source

Energy absorption capacity of NiTi lattice structure (2nd report: Dependence of energy absorption capacity by considering the tapered strut geometry)

Nihon Kikai Gakkai ronbunshu
This study explores the effect of tapered strut geometry on the mechanical and energy absorption performance of superelastic lattice structures fabricated from NiTi shape memory alloys.
Yuji ATAGO, Kuniharu USHIJIMA, Koichi TSUCHIYA   +2 more
doaj   +1 more source

Nanoprecipitate characterisation in NiTi and aluminium alloys: A TEM‐based overview

Journal of Microscopy, EarlyView.
Abstract Nanoscale precipitates are central to the functional and mechanical performance of many advanced alloys, yet their characteristics and spatial distributions can be directly resolved only by electron microscopy. In this poster‐style article, focused ion beam‐prepared TEM lamellae are used to provide a microscopy‐focused overview of ...
Seyed Aref Golsorkhi, Opemipo Adetan, Melodie Fickenscher, Dinc Erdeniz   +3 more
wiley   +1 more source