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https://www.readbyqxmd.com/read/29686158/erratum-aspirin-for-the-primary-prevention-of-cardiovascular-events-a-systematic-review-and-meta-analysis-comparing-patients-with-and-without-diabetes-diabetes-care-2009-32-2300-2306
#1
Andrew D Calvin, Niti R Aggarwal, Mohammad Hassan Murad, Qian Shi, Mohamed B Elamin, Jeffrey B Geske, M Merce Fernandez-Balsells, Felipe N Albuquerque, Julianna F Lampropulos, Patricia J Erwin, Steven A Smith, Victor M Montori
No abstract text is available yet for this article.
April 23, 2018: Diabetes Care
https://www.readbyqxmd.com/read/29685025/comparison-of-coronal-leakage-of-different-root-canal-filling-techniques-an-ex-vivo-study
#2
A Libonati, V Di Taranto, C D Agostini, M M Santoro, D Di Carlo, D Ombres, G Gallusi, C Favalli, G Marzo, V Campanella
The aim of this study was to compare the quality of the coronal seal, using an in vitro bacterial invasion test, of three different root canal filling systems. Twenty-seven freshly extracted mandibular premolars were selected and divided into three experimental groups (G1, G2 and G3 n=7) and two control groups (Ct+ and Ct- n=3). All teeth in the experimental groups were prepared using NiTi Mtwo rotating instruments and then the endodontic treatments were completed using the three-tested warm guttapercha root filling techniques: Microseal (G1), Thermafil (G2) and System B (G3)...
March 2018: Journal of Biological Regulators and Homeostatic Agents
https://www.readbyqxmd.com/read/29677771/investigating-self-centering-capacity-of-superelastic-shape-memory-alloy-fibers-with-different-anchorages-through-pullout-tests
#3
Eunsoo Choi, Seung-Wook Chae, Hancheol Park, Tae-Hyun Nam, Behzad Mohammadzadeh, Jin-Ha Hwang
This study investigated the pull-out resistance of superelastic shape memory alloy (SMA) short fibers in mortar with consideration of various end-anchorages that provide different anchoring actions. For the purpose, four types of SMA fibers were prepared using NiTi SMA wires with a diameter of 1.0 mm and the following four end shapes: straight (ST), L-shaped (LS), N-shaped (NS), and spearhead-shaped (SH). The straight-ended fiber was a reference with no working on the end, and the fiber with the spearhead-shaped end was crimped to make the end part flat...
September 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/29675119/microscopic-features-of-fractured-fragment-of-nickel-titanium-endodontic-instruments-by-two-different-modes-of-torsional-loading
#4
Ibrahim H Abu-Tahun, Sang Won Kwak, Jung-Hong Ha, Hyeon-Cheol Kim
This study compared the microscopic features of the fractured endodontic nickel-titanium (NiTi) rotary instruments by two different torsional loadings: repetitive torsional loading (RTL) and single torsional loading (STL) based on the International Organization for Standardization (ISO). ProTaper Next, HyFlex EDM, and V-Taper 2 were compared in this study. In the STL method, the torsional load was applied after fixing the 3 mm tip of the file, by continuous clockwise rotation (2 rpm) until fracture. In the RTL method, a preset rotational loading (0...
2018: Scanning
https://www.readbyqxmd.com/read/29670715/the-effect-of-surface-topographical-changes-of-two-different-surface-treatments-rotary-instrument
#5
Nashwan-Ahmed Qaed, Bilal-Diab Mourshed, Hashem-Motahir Al-Shamiri, Nader Alaizari, Saleh-Sulaiman Alhamdah
Background: One of the major innovations in endodontics has been the introduction of nickel-titanium (NiTi) alloy. This study evaluated the surface topographical changes of two different surface treatments rotary instrument after instrumentation and sterilization. Material and Methods: 240 Extracted teeth were included in this study. 90 new AlphaKite and Revo-S NiTi rotary instruments were selected and divided into two groups (Group A 45 AlphaKite and group B 45 Revo-S)...
January 2018: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/29653120/covered-versus-uncovered-self-conformable-metal-stent-for-palliation-of-primary-malignant-extrahepatic-biliary-strictures-a-randomized-multicenter-study
#6
Massimo Conio, Benedetto Mangiavillano, Angelo Caruso, Rosa Angela Filiberti, Todd H Baron, Luca De Luca, Sergio Signorelli, Mattia Crespi, Mario Marini, Paolo Ravelli, Rita Conigliaro, Antonella De Ceglie
BACKGROUND AND AIMS: Self-expandable metal stents (SEMSs) are used to relieve malignant biliary obstruction. We aimed to compare stent patency, adverse events rate and overall survival of covered (Niti-S Biliary ComVi) versus uncovered (Niti-s D type) self-conformable metal stents in patients with primary malignant extrahepatic biliary stricture, not eligible for surgery. METHODS: This is a multicenter randomized trial analyzing 158 patients with inoperable distal malignant biliary obstruction conducted in 5 Italian referral centers between December 2014 and October 2016...
April 10, 2018: Gastrointestinal Endoscopy
https://www.readbyqxmd.com/read/29608845/prostate-speci%C3%AF-c-membrane-antigen-targeted-therapy-of-prostate-cancer-using-a-dupa-paclitaxel-conjugate
#7
Qingzhi Lv, Jincheng Yang, Ruoshi Zhang, Zimeng Yang, Zhengtao Yang, Yongjun Wang, Youjun Xu, Zhonggui He
Prostate cancer (PCa) is the most prevalent cancer among men in the United States and remains the second-leading cause of cancer mortality in men. Paclitaxel (PTX) is the first line chemotherapy for PCa treatment, but its therapeutic efficacy is greatly restricted by the non-specific distribution in vivo. Prostate-specific membrane antigen (PSMA) is overexpressed on the surface of most PCa cells and its expression level increases with cancer aggressiveness, while being present at low levels in normal cells...
April 2, 2018: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/29603699/evaluation-of-the-effects-of-fluoride-prophylactic-agents-on-mechanical-properties-of-nickel-titanium-wires-using-scanning-electron-microscope
#8
Ajay K Gupta, Gita Shukla, Poonam Sharma, Amit K Gupta, Amit Kumar, Deepika Gupta
INTRODUCTION: Orthodontic treatment these days is increasing in demand, and therefore, it is relatively imperative for the orthodontist to prescribe the use of fluoride-containing products, such as mouthwashes and gels, to help prevent dental caries and maintain healthy oral health. The aim of the study was to assess and evaluate the effects of fluoride prophylactic agents on mechanical properties of nickel titanium (NiTi) wires during orthodontic treatment using scanning electron microscope (SEM)...
March 1, 2018: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/29596320/a-review-of-selective-laser-melted-niti-shape-memory-alloy
#9
REVIEW
Zhong Xun Khoo, Yong Liu, Jia An, Chee Kai Chua, Yu Fang Shen, Che Nan Kuo
NiTi shape memory alloys (SMAs) have the best combination of properties among the different SMAs. However, the limitations of conventional manufacturing processes and the poor manufacturability of NiTi have critically limited its full potential applicability. Thus, additive manufacturing, commonly known as 3D printing, has the potential to be a solution in fabricating complex NiTi smart structures. Recently, a number of studies on Selective Laser Melting (SLM) of NiTi were conducted to explore the various aspects of SLM-produced NiTi...
March 29, 2018: Materials
https://www.readbyqxmd.com/read/29593165/evaluation-of-selected-mechanical-properties-of-niti-rotary-glide-path-files-manufactured-from-controlled-memory-wires
#10
Miki Nishijo, Arata Ebihara, Daisuke Tokita, Hisashi Doi, Takao Hanawa, Takashi Okiji
This study aimed to investigate mechanical properties related to flexibility and fracture resistance of controlled memory wiremanufactured nickel-titanium rotary glide path files [HyFlex EDM Glide Path File (EDM) and HyFlex GPF (GPF)]. Scout RaCe (RaCe) served as control. Bending loads, torsional/cyclic fatigue resistance, and screw-in forces were measured. EDM showed a significantly larger torque at fracture, a longer time to cyclic fracture in reciprocation and a larger screw-in force compared with GPF and RaCe...
March 28, 2018: Dental Materials Journal
https://www.readbyqxmd.com/read/29582595/-preparation-of-phenyl-modified-silica-nanoflake-fibers-and-the-solid-phase-microextraction-of-polycyclic-aromatic-hydrocarbons
#11
Shanshan Zhou, Panxia Jin, Ziyi Wang, Xuemei Wang, Xinzhen DU
A novel silica-based solid-phase microextraction (SPME) fiber was successfully fabricated by the immobilization of silica nanoflakes (SiO2 NFs) onto the hydrothermally treated nickel-titanium alloy (NiTi) wire using sol-gel method, followed by self-assembled surface modification of phenyltrichlorosilane. The extraction performance of the fabricated fiber was evaluated using typical aromatic compounds in direct-immersion mode of SPME. The fiber exhibited the high extraction capability and good extraction selectivity for polycyclic aromatic hydrocarbons (PAHs) in water samples...
February 8, 2018: Se Pu, Chinese Journal of Chromatography
https://www.readbyqxmd.com/read/29576460/shape-memory-alloy-based-smart-knee-spacer-for-total-knee-arthroplasty-3d-cad-modelling-and-a-computational-study
#12
Arvind Gautam, Miguel A Callejas, Amit Acharyya, Swati Ghosh Acharyya
This study introduced a shape memory alloy (SMA)-based smart knee spacer for total knee arthroplasty (TKA). Subsequently, a 3D CAD model of a smart tibial component of TKA was designed in Solidworks software, and verified using a finite element analysis in ANSYS Workbench. The two major properties of the SMA (NiTi), the pseudoelasticity (PE) and shape memory effect (SME), were exploited, modelled, and analysed for a TKA application. The effectiveness of the proposed model was verified in ANSYS Workbench through the finite element analysis (FEA) of the maximum deformation and equivalent (von Mises) stress distribution...
March 22, 2018: Medical Engineering & Physics
https://www.readbyqxmd.com/read/29574784/new-thermomechanically-treated-niti-alloys-a-review
#13
REVIEW
J Zupanc, N Vahdat-Pajouh, E Schäfer
In the past 10 years, several proprietary processing procedures for nickel-titanium (NiTi) alloy were developed in order to improve the mechanical properties of NiTi endodontic instruments. Beside specific thermal and mechanical treatments, manufacturers introduced several machining procedures (e.g. twisting, electrical discharge machining), as well as techniques for final surface finishing. NiTi alloys used for endodontic instruments can be subdivided into instruments that mainly contain the austenite phase (austenitic: conventional NiTi, M-Wire, R-Phase) and those mainly containing the martensite phase (martensitic: CM-Wire, Gold and Blue heat-treated NiTi)...
March 25, 2018: International Endodontic Journal
https://www.readbyqxmd.com/read/29564560/shape-memory-response-of-porous-niti-shape-memory-alloys-fabricated-by-selective-laser-melting
#14
Soheil Saedi, Sayed E Saghaian, Ahmadreza Jahadakbar, Narges Shayesteh Moghaddam, Mohsen Taheri Andani, Sayed M Saghaian, Y Charles Lu, Mohammad Elahinia, Haluk E Karaca
Porous NiTi scaffolds display unique bone-like properties including low stiffness and superelastic behavior which makes them promising for biomedical applications. The present article focuses on the techniques to enhance superelasticity of porous NiTi structures. Selective Laser Melting (SLM) method was employed to fabricate the dense and porous (32-58%) NiTi parts. The fabricated samples were subsequently heat-treated (solution annealing + aging at 350 °C for 15 min) and their thermo-mechanical properties were determined as functions of temperature and stress...
March 21, 2018: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/29564218/effects-of-single-dose-low-level-laser-therapy-on-pain-associated-with-the-initial-stage-of-fixed-orthodontic-treatment-a-randomized-clinical-trial
#15
Irfan Qamruddin, Mohammad Khursheed Alam, Habiba Abdullah, Muhammad Abdullah Kamran, Nausheen Jawaid, Verda Mahroof
Objective: The aim of this study was to assess the analgesic effect of a single application of low-level laser therapy (LLLT) on spontaneous pain and pain on chewing after placement of initial archwires. Methods: Forty-two patients (26 women, 16 men) were randomly recruited for this split-mouth randomized clinical trial. Each patient received super-elastic nickel-titanium (NiTi) initial archwires (0.012, 0.014, 0.016, and 0.018-inch [in]) in the maxilla for leveling and alignment for an interval of 4 weeks between archwires...
March 2018: Korean Journal of Orthodontics
https://www.readbyqxmd.com/read/29561654/tooth-and-bone-changes-after-initial-anterior-dental-alignment-using-preformed-vs-customized-nickel-titanium-archwires-in-adults-a-randomized-clinical-trial
#16
Papatpong Phermsang-Ngarm, Chairat Charoemratrote
OBJECTIVES: To compare tooth movement achieved, time required for alignment, root resorption, and alveolar bone thickness changes during initial dental alignment between groups treated with 0.012-inch preformed heat-activated or customized nickel titanium (NiTi) archwires. MATERIALS AND METHODS: Thirty-two subjects (mean age 19.8 ± 1.7 years) with severe crowding of maxillary anterior teeth had premolar extractions and were randomly allocated into control and experimental groups receiving preformed heat-activated and customized NiTi archwires, respectively...
March 21, 2018: Angle Orthodontist
https://www.readbyqxmd.com/read/29547024/impact-of-chronic-hypoxia-on-proximal-pulmonary-artery-wave-propagation-and-mechanical-properties-in-rats
#17
Junjing Su, Charmilie C Logan, Alun D Hughes, Kim H Parker, Niti M Dhutia, Carl Christian Danielsen, Ulf Simonsen
Arterial stiffness and wave reflection are important components of the ventricular afterload. Therefore, we aimed to assess the arterial wave characteristics and mechanical properties of the proximal pulmonary arteries (PAs) in the hypoxic pulmonary hypertensive rat model. After 21 days in normoxic or hypoxic chambers (24 animals in each group), the animals underwent transthoracic echocardiography and pulmonary artery catheterization with a dual-tipped pressure and Doppler flow sensor wire. Wave intensity analysis (WIA) was performed...
March 16, 2018: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/29546390/comparison-of-the-efficacy-of-tooth-alignment-among-lingual-and-labial-brackets-an-in-vitro-study
#18
Ahmad Alobeid, Tarek El-Bialy, Susanne Reimann, Ludger Keilig, Dirk Cornelius, Andreas Jäger, Christoph Bourauel
Background/objective: The aim of this study was to evaluate the efficacy of tooth alignment with conventional and self-ligating labial and lingual orthodontic bracket systems. Materials/methods: We tested labial brackets (0.022″ slot size) and lingual brackets (0.018″ slot size). The labial brackets were: (i) regular twin brackets (GAC-Twin [Dentsply]), (ii) passive self-ligating brackets including (Damon-Q® [ORMCO]; Ortho classic H4™ [Orthoclassic]; FLI®SL [RMO]), and (iii) active self-ligating brackets (GAC In-Ovation®C [DENTSPLY] and SPEED™[Strite])...
March 13, 2018: European Journal of Orthodontics
https://www.readbyqxmd.com/read/29541716/defect-rich-ni-ti-layered-double-hydroxide-as-a-highly-efficient-support-for-au-nanoparticles-in-base-free-and-solvent-free-selective-oxidation-of-benzyl-alcohol
#19
Mengran Liu, Guoli Fan, Jiaying Yu, Lan Yang, Feng Li
Tuning the surface properties of supported metal catalysts is of vital importance for governing their catalytic performances in nanocatalysis. Here, we report highly dispersed nanometric gold nanoparticles (NPs) supported on Ni-Ti layered double hydroxides (NiTi-LDHs), which were employed in solvent-free and base-free selective oxidation of benzyl alcohol. A series of characterization techniques demonstrated that defect-rich NiTi-LDHs could efficiently stabilize Au NPs and decrease surface electron density of Au NPs...
March 15, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29541265/influence-of-file-motion-on-shaping-apical-debris-extrusion-and-dentinal-defects-a-critical-review
#20
REVIEW
Victor Feliz Pedrinha, Juliana Melo da Silva Brandão, Oscar Faciola Pessoa, Patrícia de Almeida Rodrigues
Advances in endodontics have enabled the evolution of file manufacturing processes, improving performance beyond that of conventional files. In the present study, systems manufactured using state of the art methods and possessing special properties related to NiTi alloys ( i.e ., CM-Wire, M-Wire and R-Phase) were selected. The aim of this review was to provide a detailed analysis of the literature about the relationship between recently introduced NiTi files with different movement kinematics and shaping ability, apical extrusion of debris and dentin defects in root canal preparations...
2018: Open Dentistry Journal
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