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https://www.readbyqxmd.com/read/28440911/unnoticed-aspiration-of-palate-plate-impression-material-in-a-neonate-diagnosis-therapy-outcome
#1
Friedrich Reichert, Peter Amrhein, Frank Uhlemann
A 7 week old infant was admitted with respiratory failure. Chest X-ray showed an atelectatic right upper lobe, herniation of right middle and lower lobe into the left thorax, and compression-atelectasis of the left lung. Thoracic CT showed complete occlusion of the right superior bronchus with a radiopaque foreign material. Six weeks prior, an impression for a palate plate using polyvinylsiloxane was taken. The material was removed with a rigid endoscopy, in readiness of extracorporeal oxygenation in case of tracheal obstruction or bronchial rupture...
April 25, 2017: Pediatric Pulmonology
https://www.readbyqxmd.com/read/28436522/integrated-hydrogen-evolution-and-water-cleaning-via-a-robust-graphene-supported-noble-metal-free-fe1-xcoxs2-system
#2
Yingying Fan, Dandan Wang, Dongxue Han, Yingming Ma, Shuang Ni, Zhonghui Sun, Xiandui Dong, Li Niu
In an electrocatalytic hydrogen evolution reaction (HER) system, a cathodic H(+) resource, an anodic sacrificial agent and a robust catalyst are three essential factors. Industry wastewater emissions, containing high levels of acidity and organic dyes, actually can satisfy the material requirements for the HER. Herein, a new HER method is proposed, taking acidic ions from wastewater as a cathodic resource to produce H2, while organic dye waste acts as an anodic sacrifice to balance the reaction. In such a way, a sustainable H2 energy source can be generated and clean water is obtained as well...
April 24, 2017: Nanoscale
https://www.readbyqxmd.com/read/28422353/comprehensive-review-and-comparison-of-the-disinfection-techniques-currently-available-in-the-literature
#3
REVIEW
Ahila S Chidambaranathan, Muthukumar Balasubramanium
The goal of disinfection in the dental office is to prevent the spread of infection from one patient to another and maintain the safety of the dental care providers. Prevention of cross infection has significant effect on infection control. The standard procedure of rinsing impressions under tap water immediately after removal from the mouth eliminates microorganisms along with saliva and blood. A broad search on published literature was done using the keywords impression materials, disinfection method, and sterilization of dental impression from 1980 to 2016 in Medline, Google Scholar, the internet, and textbooks...
April 19, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/28417109/intractable-methicillin-resistant-staphylococcus-aureus-otorrhea-with-silicone-impression-in-the-middle-ear
#4
Eun Kyung Jung, Chul Ho Jang, Jong Yuap Seong, Yong Beom Cho
We report a case of methicillin-resistant Staphylococcus aureus (MRSA) otorrhea with impression material of hearing aid in the middle ear. The patient had chronic otitis media in the right ear with sensorineural hearing loss in both ears. The silicone flowed into the middle ear through a tympanic membrane perforation during the process of making an ear mold. Several days after hearing aid fitting, the patient had severe otalgia, intractable otorrhea, aggravated hearing loss, and dizziness. The pus culture and sensitivity test revealed MRSA...
April 2017: Journal of Audiology & Otology
https://www.readbyqxmd.com/read/28402732/different-methods-for-inlay-production-effect-on-internal-and-marginal-adaptation-adjustment-time-and-contact-point
#5
M P Rippe, C Monaco, L Volpe, M A Bottino, R Scotti, L F Valandro
The aim of this study was to evaluate the effect of different production methods of resin and ceramic inlays on marginal and internal adaptation, adjustment time, and proximal contacts. Forty premolars were selected, embedded (their roots), and prepared to receive inlays that were made as follows (n=10): LaRe-digital impression with a Lava C.O.S. scanner, followed by milling of Lava Ultimate block (composite resin) in a milling center; CeRe-digital impression with a Cerec 3D Bluecam scanner, followed by milling of Lava Ultimate block in Cerec; CeDis-digital impression with a Cerec 3D Bluecam scanner, followed by milling of IPS e...
April 12, 2017: Operative Dentistry
https://www.readbyqxmd.com/read/28401974/promoting-power-density-by-cleaving-licoo2-into-nano-flake-structure-for-high-performance-supercapacitor
#6
Qipeng Liu, Muhammad Sufyan Javed, Cuilin Zhang, Yanrong Li, Chenguo Hu, Chengshuang Zhang, Meihui Lai, Qi Yang
LiCoO2 (LCO) usually can deliver high energy density but low power density in Li-ion batteries (LIBs). Whether LCO could be used as electrode material for high-performance supercapacitors is dependent on promoting its power density. Owing to Faradaic redox reactions taking place on its surfaces or inside crystals through ion intercalation/deintercalation from the surfaces, increasing the specific area of LCO is a key factor to promote its rate capability. Herein, we report a facile strategy to prepare LCO nano-flakes with high specific area exceeding that of currently used micro-scale particles in LIBs...
April 12, 2017: Nanoscale
https://www.readbyqxmd.com/read/28397862/a-robust-salt-tolerant-superoleophobic-alginate-graphene-oxide-aerogel-for-efficient-oil-water-separation-in-marine-environments
#7
Yuqi Li, Hui Zhang, Mizi Fan, Peitao Zheng, Jiandong Zhuang, Lihui Chen
Marine pollution caused by frequent oil spill accidents has brought about tremendous damages to marine ecological environment. Therefore, the facile large-scale preparation of three-dimensional (3D) porous functional materials with special wettability is in urgent demand. In this study, we report a low-cost and salt-tolerant superoleophobic aerogel for efficient oil/seawater separation. The aerogel is prepared through incorporating graphene oxide (GO) into alginate (ALG) matrix by using a facile combined freeze-drying and ionic cross-linking method...
April 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28395254/facile-and-efficient-electrochemical-enantiomer-recognition-of-phenylalanine-using-%C3%AE-cyclodextrin-immobilized-on-reduced-graphene-oxide
#8
Shabi Abbas Zaidi
This work demonstrates the facile and efficient preparation protocol of β-Cyclodextrin-reduced graphene oxide modified glassy carbon electrode (β-CD/RGO/GCE) sensor for an impressive chiral selectivity analysis for phenylalanine enantiomers. In this work, the immobilization of β-CD over graphene sheets allows the excellent enantiomer recognition due to the large surface area and high conductivity of graphene sheets and extraordinary supramolecular (host-guest interaction) property of β-CD. The proposed sensor was well characterized by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), and electrochemical impedance spectroscopy (EIS) techniques...
April 5, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28393431/size-tunable-photothermal-germanium-nanocrystals
#9
Wei Sun, Grace Zhong, Christian Kübel, Abdinoor A Jelle, Chenxi Qian, Lu Wang, Manuchehr Ebrahimi, Laura M Reyes, Amr S Helmy, Geoffrey A Ozin
Germanium nanocrystals (ncGe) have not received as much attention as silicon nanocrystals (ncSi). However, Ge has demonstrated superiority over Si nanomaterials in some applications. Examples include, high charge-discharge rate lithium-ion batteries, small band-gap opto-electronic devices, and photo-therapeutics. When stabilized in an oxide matrix (ncGe/GeOx ), its high charge-retention has enabled non-volatile memories. It has also found utility as a high-capacity anode material for Li-ion batteries with impressive stability...
April 10, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28388227/the-social-lives-of-global-policies-against-malaria-conceptual-considerations-past-experiences-and-current-issues
#10
Julian Eckl
While a casual observer might easily get the impression that global policies against malaria have unanimous support, there are strongly divergent perspectives on malaria control. Analyzing ethnographic and historical material through a political science lens, I foreground the social negotiation of malaria both as an illness experience of affected populations and as a disease problem defined by experts. Taking the interrelationship between problems, solutions, and solution providers as a point of departure, I reconstruct recurrent tensions and social mechanisms that can account for the tendency to downplay conflicts and to produce technical-biomedical solutions that seem to be irresistible...
April 7, 2017: Medical Anthropology
https://www.readbyqxmd.com/read/28385103/effect-of-orthognathic-surgery-on-masticatory-performance-and-muscle-activity-in-skeletal-class-iii-patients
#11
Deniz Celakil, Fulya Ozdemir, Feyza Eraydin, Tamer Celakil
OBJECTIVE: To evaluate the effect of double jaw orthognathic surgery (OGS) on masticatory performance and electromyographic activity of the masseter and anterior temporal muscles in skeletal Class III patients. METHODS: Individuals were instructed to chew standardized round tablets of silicone impression material. The cumulative weight percentage was calculated using sieve analysis. The bilateral surface electromyographic activity of the muscles was evaluated. Following the orthodontic treatment, a stabilization splint was fabricated...
April 7, 2017: Cranio: the Journal of Craniomandibular Practice
https://www.readbyqxmd.com/read/28383799/facile-synthesis-of-rod-like-cu2-xse-and-insight-into-its-improved-lithium-storage-property
#12
He Li, Jiali Jiang, Feng Wang, Jianxing Huang, Yunhui Wang, Yiyong Zhang, Jinbao Zhao
A rod-like Cu2-xSe is synthesized via a facile water evaporation process. The electrochemical reaction mechanism is investigated with ex-situ X-ray diffraction (XRD) test. By adopting ether-based electrolyte instead of carbonate-based electrolyte, the electrochemical performance of Cu2-xSe electrodes improves significantly. The Cu2-xSe electrodes exhibit outstanding cycle performance, after 1000 cycles, 160 mAh g-1 can be maintained with the retention of 80.3 %. At current density of 100, 200, 500 and 1000 mA g-1, the capacity of Cu2-xSe/Li battery is 208, 202, 200 and 198 mAh g-1, respectively, showing excellent rate capability...
April 6, 2017: ChemSusChem
https://www.readbyqxmd.com/read/28382001/addressing-adherence-using-genotype-specific-pbpk-modeling-impact-of-drug-holidays-on-tamoxifen-and-endoxifen-plasma-levels
#13
Kristin J R Dickschen, Stefan Willmann, Georg Hempel, Michael Block
Introduction: Tamoxifen is one of the most common treatment opportunities for hormonal positive breast cancer. Despite its good tolerability, patients demonstrate decreasing adherence over years impacting on therapeutic success. PBPK modeling was applied to demonstrate the impact of drug holidays on plasma levels of tamoxifen and its active metabolite endoxifen for different CYP2D6 genotypes. Materials and Methods: A virtual study with 24,000 patients was conducted in order to investigate the development of tamoxifen steady-state kinetics in patient groups of different CYP2D6 genotypes...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28369686/on-demand-tuned-hazard-free-elastomeric-composites-a-green-approach
#14
Partheban Manoharan, Narayan Chandra Das, Kinsuk Naskar
Rising ecological concerns and depletion of the potentially harmful environmental impacts caused by rubber products, are of prime importance in the industry. Therefore, implementation of sustainable greener materials is required to minimize the detrimental influences. In this research, we investigated the beneficial influence of naturally derived bio-resin towards the effects of association with Zinc Oxide Nanoparticles in highly dispersible silica (HDS) reinforced Natural rubber (NR)/Epoxidized Natural Rubber (ENR) based composites...
March 31, 2017: Biopolymers
https://www.readbyqxmd.com/read/28368112/successive-ionic-layer-absorption-and-reaction-for-postassembly-control-over-inorganic-interdot-bonds-in-long-range-ordered-nanocrystal-films
#15
Benjamin E Treml, Benjamin H Savitzky, Ali M Tirmzi, Jessica Cimada DaSilva, Lena F Kourkoutis, Tobias Hanrath
Epitaxially connected assemblies of nanocrystals (NCs) present an interesting new class of nanomaterial in which confinement of charge carriers is intermediate between that of a quantum dot and a quantum well. Despite impressive advances in the formation of high-fidelity assemblies, predicted collective properties have not yet emerged. A critical knowledge gap toward realizing these properties is the current lack of understanding of and control over the formation of epitaxial interdot bonds connecting the NCs within the assemblies...
April 10, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28365809/randomised-clinical-trial-to-evaluate-changes-in-dentine-tubule-occlusion-following-4%C3%A2-weeks-use-of-an-occluding-toothpaste
#16
Joon Seong, Charles P Parkinson, Maria Davies, Nicholas C A Claydon, Nicola X West
OBJECTIVES: The objective of this study is to determine whether a silicone impression material could precisely replicate dentine tubule changes following 4 weeks toothbrushing with occluding or non-occluding toothpaste and whether changes reflected hypersensitivity clinical assessment. MATERIALS AND METHODS: This was a single site, examiner blind, parallel, two treatment arm, randomised clinical trial. Participants were healthy, ≥18, with ≥1 sensitive tooth with exposed dentine, Schiff sensitivity score ≥2, and patent tubules with dentine occlusion score 4-5 as determined by scanning electron microscopy of replica impressions...
April 1, 2017: Clinical Oral Investigations
https://www.readbyqxmd.com/read/28362689/collaboration-patterns-and-processes-between-dentists-and-dental-laboratories-when-planning-and-fabricating-implant-supported-restorations
#17
Noga Harel, Avi Meirowitz, Jonathan Block, Ady Palti, Shlomo Matalon, Zeev Ormianer
INTRODUCTION: The success of implant-supported restorations is dependent on proper treatment planning, effective communication within the clinical team, and the use of appropriate methods and materials in the dental laboratory. The objective of this study was to determine collaboration trends between dentists and laboratories and to assess the common methods and materials involved in fabricating implant-supported restorations. METHODS: Questionnaires were distributed to dental laboratories and technicians...
March 29, 2017: Implant Dentistry
https://www.readbyqxmd.com/read/28348595/in-vitro-comparative-evaluation-of-different-types-of-impression-trays-and-impression-materials-on-the-accuracy-of-open-tray-implant-impressions-a-pilot-study
#18
Sonam Gupta, Aparna Ichalangod Narayan, Dhanasekar Balakrishnan
Purpose. For a precise fit of multiple implant framework, having an accurate definitive cast is imperative. The present study evaluated dimensional accuracy of master casts obtained using different impression trays and materials with open tray impression technique. Materials and Methods. A machined aluminum reference model with four parallel implant analogues was fabricated. Forty implant level impressions were made. Eight groups (n = 5) were tested using impression materials (polyether and vinylsiloxanether) and four types of impression trays, two being custom (self-cure acrylic and light cure acrylic) and two being stock (plastic and metal)...
2017: International Journal of Dentistry
https://www.readbyqxmd.com/read/28345866/biocompatible-hydroxylated-boron-nitride-nanosheets-poly-vinyl-alcohol-interpenetrating-hydrogels-with-enhanced-mechanical-and-thermal-responses
#19
Lin Jing, Hongling Li, Roland Yingjie Tay, Bo Sun, Siu Hon Tsang, Olivier Cometto, Jinjun Lin, Edwin Hang Tong Teo, Alfred Iing Yoong Tok
Poly(vinyl alcohol) (PVA) hydrogels with tissue-like viscoelasticity, excellent biocompatibility, and high hydrophilicity have been considered as promising cartilage replacement materials. However, lack of sufficient mechanical properties is a critical barrier to their use as load-bearing cartilage substitutes. Herein, we report hydroxylated boron nitride nanosheets (OH-BNNS)/PVA interpenetrating hydrogels by cyclically freezing/thawing the aqueous mixture of PVA and highly hydrophilic OH-BNNS (up to 0.6 mg/mL, two times the highest reported so far)...
April 25, 2017: ACS Nano
https://www.readbyqxmd.com/read/28343370/the-esthetic-and-psychologic-benefits-of-an-intraoperative-provisional-restoration
#20
Robert D Walter, Charles J Goodacre
OBJECTIVE: When multiple visible teeth are prepared, the prolonged treatment time may lead to patients needing a break that requires them to leave the operatory. Such a situation allows the patient to view their prepared teeth, a process that can be disconcerting to some patients. CLINICAL CONSIDERATIONS: An intraoperative provisional restoration can be made by using a thermoplastic vacuum-formed matrix of the patient's teeth that is filled with white-colored impression material and then placed over the prepared teeth to form a provisional restoration...
March 26, 2017: Journal of Esthetic and Restorative Dentistry
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