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Mohd Ashraf Rather, Irfan Ahmad Bhat, Niti Sharma, Rupam Sharma
The increasing application of nanomaterials both in commercial and industrial products has led their accumulation in the aquatic ecosystem. The rapid development and large scale production of nanomaterials in the last few decades have stimulated concerns regarding their potential environmental health risks on aquatic biota. Inorganic nanoparticles, due to their unique properties and associated material characteristics resulted in toxicity of these nanomaterials in aquatic organisms. Understanding their novel properties at nanoscale has established to be a significant aspect of their toxicity...
2018: Advances in Experimental Medicine and Biology
Murilo Matias, Marcos Roberto de Freitas, Karina Maria Salvatore de Freitas, Guilherme Janson, Rodrigo Hitoshi Higa, Manoela Fávaro Francisconi
Coated archwires and ceramic brackets have been developed to improve facial esthetics during orthodontic treatment. However, their mechanical behavior has been shown to be different from metallic archwires and brackets. Therefore, the aim of this study was to compare the deflection forces in coated nickel-titanium (NiTi) and esthetic archwires combined with ceramic brackets. Material and Methods Non-coated NiTi (NC), rhodium coated NiTi (RC), teflon coated NiTi (TC), epoxy coated NiTi (EC), fiber-reinforced polymer (FRP), and the three different conventional brackets metal-insert polycrystalline ceramic (MI-PC), polycrystalline ceramic (PC) and monocrystalline ceramic (MC) were used...
2018: Journal of Applied Oral Science: Revista FOB
Niti R Aggarwal, Hena N Patel, Laxmi S Mehta, Rupa M Sanghani, Gina P Lundberg, Sandra J Lewis, Marla A Mendelson, Malissa J Wood, Annabelle S Volgman, Jennifer H Mieres
Evolving knowledge of sex-specific presentations, improved recognition of conventional and novel risk factors, and expanded understanding of the sex-specific pathophysiology of ischemic heart disease have resulted in improved clinical outcomes in women. Yet, ischemic heart disease continues to be the leading cause of morbidity and mortality in women in the United States. The important publication by the Institute of Medicine titled "Women's Health Research-Progress, Pitfalls, and Promise," highlights the persistent disparities in cardiovascular disease burden among subgroups of women, particularly women who are socially disadvantaged because of race, ethnicity, income level, and educational attainment...
February 2018: Circulation. Cardiovascular Quality and Outcomes
K Yılmaz, G Uslu, T Özyürek
AIM: To compare the effect of autoclave cycles on the surface topography and roughness of HyFlex CM and HyFlex EDM instruments using atomic force microscopy (AFM) analysis. METHODOLOGY: Eight new files of each brand were subdivided into four subgroups (n = 2/each subgroup). One group was allocated as the control group and not subjected to autoclave sterilization. The other three groups were subjected to different numbers (1, 5, and 10) of autoclave sterilization cycles...
February 13, 2018: Clinical Oral Investigations
Shadir Bughari Basheer Ahamed, Purushothaman Pranav Vanajassun, Kothandaraman Rajkumar, Sekar Mahalaxmi
INTRODUCTION: Single cross-sectional nickel-titanium (NiTi) rotary instruments during continuous rotations are subjected to constant and variable stresses depending on the canal anatomy. This study was intended to create 2 new experimental, theoretic single-file designs with combinations of triple U (TU), triangle (TR), and convex triangle (CT) cross sections and to compare their bending stresses in simulated root canals with a single cross-sectional instrument using finite element analysis...
February 6, 2018: Journal of Endodontics
Xiaoying Lü, Yayun Qu, Ying Hong, Yan Huang, Yiwen Zhang, Dayun Yang, Fudan Zhang, Tingfei Xi, Deyuan Zhang
The purpose of this paper is to utilize the signaling pathway polymerase chain reaction (PCR) arrays to investigate the activation of two important biological signaling pathways in endothelial cell adhesion and growth mediated by adsorbed serum protein on the surface of bare and titanium nitride (TiN)-coated nickel titanium (NiTi) alloys. First, the endothelial cells were cultured on the bare and TiN-coated NiTi alloys and chitosan films as control for 4 h and 24 h, respectively. Then, the total RNA of the cells was collected and the PCR arrays were performed...
February 2018: Regenerative Biomaterials
Jan Hillson, Tim Mant, Molly Rosano, Carolyn Huntenburg, Mehrshid Alai-Safar, Siddhesh Darne, Donna Palmer, Borislava G Pavlova, Jennifer Doralt, Russell Reeve, Niti Goel, Doris Weilert, Paul W Rhyne, Kamali Chance, John Caminis, James Roach, Tanmoy Ganguly
The aims of this randomized, double-blind, three-arm, single-dose study were to demonstrate pharmacokinetic (PK) equivalence of the adalimumab biosimilar M923 (hereafter referred to as "M923") to each of 2 reference products, and to assess M923's safety and immunogenicity. Primary PK endpoints were maximum observed concentration (Cmax ), area under the curve (AUC) from time 0 extrapolated to infinity (AUC0-inf ), and AUC from time 0 to 336 hours (AUC0-336 ). Secondary endpoints included safety and immunogenicity assessments...
February 2018: Pharmacology Research & Perspectives
AmirHossein Mirhashemi, Sahar Jahangiri, MohammadJavad Kharrazifard
BACKGROUND: Corrosion resistance is an important requirement for orthodontic appliances. Nickel and chromium may be released from orthodontic wires and can cause allergic reactions and cytotoxicity when patients use various mouthwashes to whiten their teeth. Our study aimed to assess the release of nickel and chromium ions from nickel titanium (NiTi) and stainless steel (SS) orthodontic wires following the use of four common mouthwashes available on the market. METHODS: This in vitro, experimental study was conducted on 120 orthodontic appliances for one maxillary quadrant including five brackets, one band and half of the required length of SS, and NiTi wires...
February 5, 2018: Progress in Orthodontics
Eugenio Pedullà, Angela Benites, Giusy M La Rosa, Gianluca Plotino, Nicola M Grande, Ernesto Rapisarda, Luigi Generali
INTRODUCTION: The purpose of this study was to assess the effects of sodium hypochlorite (NaOCl) immersion and sterilization on the cyclic fatigue resistance of heat-treated nickel-titanium (NiTi) rotary instruments. METHODS: Two hundred ten new 25/.06 Twisted Files (TFs; SybronEndo, Orange, CA) and Hyflex CM (Coltene Whaledent, Cuyahoga Falls, OH) files were divided into 7 groups (n = 15) for each brand. Group 1 (control group) included new instruments that were not immersed in NaOCl or subjected to autoclave sterilization...
January 31, 2018: Journal of Endodontics
Richa Sharma, Mukund M D Pramanik, Balasubramanian Chandramouli, Namrata Rastogi, Niti Kumar
Dysfunctional organellar protein quality control machinery leads to protein misfolding associated cardiovascular, neurodegenerative, metabolic and secretory disorders. To understand organellar homeostasis, suitable tools are required which can sense changes in their respective protein folding capacity upon exposure to environmental and pharmacological perturbations. Herein, we have assessed protein folding capacity of cellular organelles using a metastable sensor selectively targeted to cytosol, nucleus, mitochondria, endoplasmic reticulum, golgi and peroxisomes...
January 10, 2018: European Journal of Cell Biology
Siddhartha Das, Ataide De Ida, Subhasis Das, Vineet Nair, Nairita Saha, Sayan Chattopadhyay
Context: Endodontic retreatment is performed in teeth with endodontic failures. The main goal of retreatment is cleaning and shaping of the root canal with removal of old root filling material. Hand instruments and rotary instruments are mainly used for removing this filling material. Aim of Study: To compare the relative efficacy of three rotary instrumentation systems for removal of gutta-percha from root canal during endodontic retreatment. Objective of Study: To find out which NiTi system is more efficacious in retreatment and to check out the efficacy of retreatment with and without use of solvent...
September 2017: Journal of Conservative Dentistry: JCD
K Yılmaz, G Uslu, M Gündoğar, T Özyürek, N M Grande, G Plotino
AIM: To compare the cyclic fatigue resistance of the One G, ProGlider, HyFlex EDM and R-Pilot glide path NiTi files at body temperature. METHODOLOGY: Twenty One G (size 14, .03 taper), 20 ProGlider (size 16, .02 taper), 20 HyFlex EDM (size 10, .05 taper) and 20 R-Pilot (size 12.5, .04 taper) instruments were operated in rotation at 300rpm (One G, ProGlider and HyFlex) or in reciprocation (R-Pilot) at 35°C in artificial canals that were manufactured by reproducing the size and taper of the instrument until fracture occurred...
January 31, 2018: International Endodontic Journal
Taha Özyürek, Mustafa Gündoğar, Gülşah Uslu, Koray Yılmaz, Simone Staffoli, Grande Nm, Gianluca Plotino, Antonella Polimeni
The aim of the present study was to compare the cyclic fatigue resistances of HyFlex EDM (HEDM), WaveOne Gold (WOG), Reciproc Blue (RB), and 2Shape (TS) NiTi systems having different metallurgic properties. HEDM, WOG, RB, and TS instruments were rotated in artificial canals which were made of stainless steel with an inner diameter of 1.5 mm, 45°, and 90° angles of curvatures and a radius of curvature of 5 mm until fracture occurred, and the time to fracture (TTF) was recorded in seconds. Also, number of cycles to fracture was calculated (NCF)...
January 30, 2018: Odontology
Masataka Kikuyama, Naofumi Shirane, Shinya Kawaguchi, Shuzou Terada, Tsuyoshi Mukai, Ken Sugimoto
AIM: To investigate whether an uncovered self-expandable metal stent (UCSEMS) with a large diameter could prevent recurrent biliary obstruction (RBO). METHODS: Thirty-eight patients with malignant biliary obstruction underwent treatment with an UCSEMS with a 14-mm diameter (Niti-S 14). Retrospectively, we evaluated technical and functional success rate, RBO rate, time to RBO, survival time, and adverse events in these patients. RESULTS: Stent placement success and functional success were achieved in all patients...
January 16, 2018: World Journal of Gastrointestinal Endoscopy
Myrna Maria Arcanjo Frota, Ricardo Affonso Bernardes, Rodrigo Ricci Vivan, Nilton Vivacqua-Gomes, Marco Antonio Hungaro Duarte, Bruno Carvalho de Vasconcelos
To evaluate the amount of apically extruded debris, percentage of foraminal enlargement and apical foramen (AF) deformation that occurred during root canal preparation with different reciprocation systems: Reciproc, WaveOne (M-Wire), and ProDesign R (Shape Memory Technology Wire) at two different working lengths (WLs): 0.0 and 1.0 mm beyond the AF. The AF of 120 root canals in 60 mesial roots of mandibular molars were photographed with stereomicroscope and randomly assigned into four groups: manual, Reciproc (REC), WaveOne (WO), and ProDesign R (PDR); subsequently, they were further subdivided according to the WL (n=15)...
January 18, 2018: Journal of Applied Oral Science: Revista FOB
P Neelakantan, K Khan, K Y Li, H Shetty, W Xi
AIM: To examine the efficacy of a novel supplementary irrigant agitating brush (Finisher GF Brush, Medic NRG) on the debridement of root canals prepared with a novel stainless-steel rotary instrumentation system (Gentlefile, MedicNRG, Kibbutz Afikim, Israel), or nickel titanium rotary instruments in oval root canals. METHODOLOGY: Mandibular premolars (n=72) were selected and divided randomly into three experimental groups (n=24) after microCT scanning: group 1, rotary NiTi to size 20, ...
January 24, 2018: International Endodontic Journal
Stefania Sacchi, Niti M Dhutia, Matthew J Shun-Shin, Massoud Zolgharni, Nilesh Sutaria, Darrel P Francis, Graham D Cole
Aims: Measurements with superior reproducibility are useful clinically and research purposes. Previous reproducibility studies of Doppler assessment of aortic stenosis (AS) have compared only a pair of observers and have not explored the mechanism by which disagreement between operators occurs. Using custom-designed software which stored operators' traces, we investigated the reproducibility of peak and velocity time integral (VTI) measurements across a much larger group of operators and explored the mechanisms by which disagreement arose...
January 15, 2018: European Heart Journal Cardiovascular Imaging
Thomas C C Boerlage, Gerardus P M Houben, Marcel J M Groenen, Klaas van der Linde, Arnold W J M van de Laar, Marloes Emous, Paul Fockens, Rogier P Voermans
BACKGROUND: Staple line leakage after bariatric surgery can be treated by endoscopic placement of a self-expandable stent. The success rate of stent placement is generally high, but migration is a frequent adverse event that hampers successful treatment. The Niti-S Beta stent is a fully covered double-bump stent that was specifically designed to prevent migration. This study aimed to evaluate the effectiveness and adverse event rate of the Niti-S Beta stent. METHODS: A retrospective study was performed in three high-volume bariatric centers...
January 17, 2018: Surgical Endoscopy
Gloria Basile, Giorgio Baudana, Giulio Marchese, Massimo Lorusso, Mariangela Lombardi, Daniele Ugues, Paolo Fino, Sara Biamino
In this work, the characterization of the assembly of a steel shaft into a γ-TiAl part for turbocharger application, obtained using Electron Beam Welding (EBW) technology with a Ni-based filler, was carried out. The Ti-48Al-2Nb-0.7Cr-0.3Si (at %) alloy part was produced by Electron Beam Melting (EBM). This additive manufacturing technology allows the production of a lightweight part with complex shapes. The replacement of Nickel-based superalloys with TiAl alloys in turbocharger automotive applications will lead to an improvement of the engine performance and a substantial reduction in fuel consumption and emission...
January 17, 2018: Materials
Andrew I Chin, Suresh Appasamy, Robert J Carey, Niti Madan
No abstract text is available yet for this article.
January 2018: KI Reports
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