Results 41 to 50 of about 1,143,710 (211)

Experimental evaluation of cyclic fatigue resistance of four different nickel-titanium instruments after immersion in sodium hypochlorite and/or sterilization

Journal of Applied Oral Science, 2013
NiTi instruments have a high risk of separation due to torsional or flexural fatigue (cyclic fatigue). Chemomechanical preparation, cleaning procedures, chemical disinfection and sterilization cause the corrosion of endodontic instruments that may weaken
Ureyen Kaya BULEM, Ayse Diljin KECECI, Hilmi Egemen GULDAS   +2 more
doaj   +1 more source

Mechanism of fracture of NiTi superelastic endodontic rotary instruments

Journal of Materials Science: Materials in Medicine, 2018
The aim is to investigate the premature catastrophic fracture produced for different periods during clinical endodontic treatment of two brands of NiTi endodontic rotary instruments. 3 samples as-received, 6 samples used with patients for 2 and 7 h and 5 samples fractured were studied for each brand of endodontic NiTi rotary instruments. Transformation
Gil J, Rupérez E, Velasco E, Aparicio C, Manero JM   +4 more
openaire   +3 more sources

Investigating the Effect of Inclination Angle and the Influence of Scan Parameters on the Appearance and Thermal and Mechanical Properties of Filigree Tension Rods of LPBF‐Manufactured NiTi Shape‐Memory Alloys

Advanced Engineering Materials, EarlyView.
This article investigates the dependence of the properties on the manufacturing orientation in the form of the inclination angle to the build plate of LPBF‐fabricated NiTi rods with a diameter of 150–220 µm. Metallographic, chemical, thermal, and mechanical characterization show behavior under identical manufacturing conditions that ranges from ...
Sandra Herzig, Michael Werner, Christian Rotsch   +2 more
wiley   +1 more source

Functional fatigue in NiTi shape memory alloy wires - A comparative study [PDF]

, 2012
The functional fatigue behaviour of two near equi-atomic NiTi shape memory alloy wires obtained from different sources were evaluated. Results showed that though the wires had similar transformation temperatures and mechanical properties, their ...
Ramaiah, KV, Bhaumik, SK, Saikrishna, CN, Vidyashankar, B   +3 more
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Cyclic flexural fatigue resistance of NiTi Controlled Memory and Blue Technology instruments after torsional preloading

Journal of Applied Oral Science, 2018
Objective The aim of this study was to evaluate the influence of torsional preloading on the cyclic flexural fatigue resistance of thermally treated NiTi instruments.
Túlio César MODESTO, Eufemia Carolina Peláez ACOSTA, Pedro Damas RESENDE, Érika Sales Joviano PEREIRA, Isabella Faria da Cunha PEIXOTO, Vicente Tadeu Lopes BUONO, Ana Cecília Diniz VIANA   +6 more
doaj   +1 more source

Unveiling Exsolution‐Induced Giant Electronic and Magnetic Property Changes in Non‐Stoichiometric Titanate Perovskite Thin Films

Advanced Materials, EarlyView.
A giant insulator to metal transition and emergent superparamagnetism are revealed by nanoparticle exsolution in non‐stoichiometric titanate perovskite thin films. By combining transport, synchrotron spectroscopy, and first‐principles calculations, this work reveals how defect reconfiguration and lattice reconstruction fundamentally reshape electronic ...
Sungil Kim, June Ho Lee, Yaolong Xing, Dongchang Kim, Haeseong Jeong, Mongjun Jeong, Manuel Valvidares, Stuart S. P. Parkin, Sang Ho Oh, Donghwa Lee, Hyojin Yoon, Hyeon Han   +11 more
wiley   +1 more source

Role of the flat-designed surface in improving the cyclic fatigue resistance of endodontic NiTi rotary instruments [PDF]

, 2019
The aim of this study was to investigate the role of the flat-designed surface in improving the resistance to cyclic fatigue by comparing heat-treated F-One (Fanta Dental, Shanghai, China) nickel-titanium (NiTi) rotary instruments and similar prototypes,
Seracchiani M., D'Angelo M., Gambarini G., Testarelli L., Miccoli G., DONFRANCESCO, ORLANDO, Di Nardo D., KHRENOVA, TATYANA, Galli M., Maurilio D’Angelo, Luca Testarelli, Dario Di Nardo, Orlando Donfrancesco, Marco Seracchiani, Massimo Galli, Gabriele Miccoli, Tatyana Khrenova, Gianluca Gambarini   +17 more
core   +2 more sources

The management of separated endodontic instruments using a customized syringe and loop technique: A case series

Endodontology, 2023
The separation of the nickel-titanium (NiTi) rotary files is seen occasionally due to improper use and lack of technique, which results in improper cleaning and shaping of the root canals, compromising the treatment outcome.
Raghavendra Penukonda, Harsh Amlani, Harshada Pattar, Galvin Sim Siang Lin   +3 more
doaj   +1 more source

From the Discovery of the Giant Magnetocaloric Effect to the Development of High‐Power‐Density Systems

Advanced Materials Technologies, EarlyView.
The article overviews past and current efforts on caloric materials and systems, highlighting the contributions of Ames National Laboratory to the field. Solid‐state caloric heat pumping is an innovative method that can be implemented in a wide range of cooling and heating applications.
Agata Czernuszewicz, Yaroslav Mudryk, Jun Cui, Lucas Griffith, Duane D. Johnson, Julie Slaughter   +5 more
wiley   +1 more source

Efeito do tempo de tratamento térmico de fios de NiTi conformados a frio na temperatura final de transformação austenítica [PDF]

, 2011
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico, Programa de Pós-Graduação em Ciência e Engenharia dos Materiais, Florianópolis, 2011As ligas com memória de forma são definidas como uma distinta classe de materiais ...
Wiggers, William de Souza
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