keyword
MENU ▼
Read by QxMD icon Read
search

impression material

keyword
https://www.readbyqxmd.com/read/29155409/biomaterial-strategies-for-limiting-the-impact-of-secondary-events-following-spinal-cord-injury
#1
Trevor R Ham, Nic D Leipzig
The nature of traumatic spinal cord injury (SCI) often involves limited recovery and long-term quality of life complications. The initial injury sets off a variety of secondary cascades, which result in an expanded lesion area. Ultimately, the native tissue fails to regenerate. As treatments are developed in the laboratory, the management of this secondary cascade is an important first step in achieving recovery of normal function. Current literature identifies four broad targets for intervention: inflammation, oxidative stress, disruption of the blood-spinal cord barrier, and formation of an inhibitory glial scar...
November 20, 2017: Biomedical Materials
https://www.readbyqxmd.com/read/29148238/use-of-resin-based-provisional-material-to-create-the-posterior-palatal-seal-in-complete-denture-definitive-impressions
#2
Victor Eduardo de Souza Batista, Aljomar José Vechiato-Filho, Eduardo Piza Pellizzer, Fellippo Ramos Verri
The purpose of this article was to present an alternative procedure using resin-based provisional material to create the posterior palatal seal (PPS). This method offers more practicality in clinical routine and increased control for addition of material to create the PPS when compared to traditional techniques such as the use of impression wax.
November 17, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29142641/accuracy-of-several-implant-bite-registration-techniques-an-in-vitro-pilot-study
#3
Do-Hyun Park, Ji-Man Park, Jae-Won Choi, Eun-Sook Kang, Eun-Bin Bae, Young-Chan Jeon, Chang-Mo Jeong, Mi-Jung Yun, Jung-Bo Huh
PURPOSE: This study evaluated the accuracies of different bite registration techniques for implant-fixed prostheses using three dimensional file analysis. MATERIALS AND METHODS: Implant fixtures were placed on the mandibular right second premolar, and the first and second molar in a polyurethane model. Aluwax (A), Pattern Resin (P), and Blu-Mousse (B) were used as the bite registration materials on the healing abutments (H) or temporary abutments (T). The groups were classified into HA, HP, HB, TA, TP, and TB according to each combination...
October 2017: Journal of Advanced Prosthodontics
https://www.readbyqxmd.com/read/29141102/statistically-optimized-ceftriaxone-sodium-biotransformation-through-achromobacter-xylosoxidans-strain-cef6-an-unusual-insight-for-bioremediation
#4
Ahmed Anan, Khaled M Ghanem, Amira M Embaby, Ahmed Hussein, Moustafa Y El-Naggar
The present study underlines a unique promising approach toward efficient biotransformation of ceftriaxone sodium (Ceftx), a highly frequent prescribed cephalosporin antibiotic, by a newly bacterium namely Achromobacter xylosoxidans strain Cef6 isolated from Ceftx contaminated raw materials in pharmaceutical industries. A three step sequential statistical-mathematical approach (Plackett-Burman design [PBD], Central Composite Design [CCD], and ridge-canonical analyses) was anticipated to optimize the biotransformation process...
November 15, 2017: Journal of Basic Microbiology
https://www.readbyqxmd.com/read/29136309/comparison-of-fit-of-dentures-fabricated-by-traditional-techniques-versus-cad-cam-technology
#5
J Bryan McLaughlin, Van Ramos, Douglas P Dickinson
PURPOSE: To compare the shrinkage of denture bases fabricated by three methods: CAD/CAM, compression molding, and injection molding. The effect of arch form and palate depth was also tested. MATERIALS AND METHODS: Nine titanium casts, representing combinations of tapered, ovoid, and square arch forms and shallow, medium, and deep palate depths, were fabricated using electron beam melting (EBM) technology. For each base fabrication method, three poly(vinyl siloxane) impressions were made from each cast, 27 dentures for each method...
November 14, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29131232/homogenous-graphene-oxide-peptide-nanofiber-hybrid-hydrogel-as-biomimetic-polysaccharide-hydrolase
#6
Xingxing He, Fuyuan Zhang, Jifeng Liu, Guozhen Fang, Shuo Wang
Cellulose, an impressive potential sustainable fuel, is difficult to hydrolyze because of the protection of β-1,4-glycosidic bonds through the tight hydrogen bonding network. In this study, homogenous graphene oxide (GO)-peptide nanofiber hybrid hydrogels (GO-PNFs) were designed as a β-glycosyl hydrolase mimetic to achieve efficient degradation of cellobiose and cellopentaose. For comparison, free peptides, graphene oxide mixed with free peptides (GO-peptdies) and self-assembled peptide nanofibers (PNFs) were also studied for their activity as a hydrolase mimetics for degradation of cellobiose...
November 13, 2017: Nanoscale
https://www.readbyqxmd.com/read/29120621/chemical-substitution-induced-and-competitive-formation-of-6h-and-3c-perovskite-structures-in-ba3-xsrxznsb2o9-the-coexistence-of-two-perovskites-in-0-3-%C3%A2-x-%C3%A2-1-0
#7
Jing Li, Pengfei Jiang, Wenliang Gao, Rihong Cong, Tao Yang
6H and 3C perovskites are important prototype structures in materials science. We systemically studied the structural evolution induced by the Sr(2+)-to-Ba(2+) substitution to the parent 6H perovskite Ba3ZnSb2O9. The 6H perovskite is only stable in the narrow range of x ≤ 0.2, which attributes to the impressibility of [Sb2O9]. The preference of 90° Sb-O-Sb connection and the strong Sb(5+)-Sb(5+) electrostatic repulsion in [Sb2O9] are competitive factors to stabilize or destabilize the 6H structure when chemical pressure was introduced by Sr(2+) incorporation...
November 9, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/29109322/self-disinfecting-alginate-vs-conventional-alginate-effect-on-surface-hardness-of-gypsum-cast-an-in-vitro-study
#8
Ranjith Madhavan, Navia George, Niharika R Thummala, S V Ravi, Ajay Nagpal
INTRODUCTION: For the construction of any dental prosthesis, accurate impressions are necessary. Hence, we undertook the present study to evaluate and compare the surface hardness of gypsum casts poured from impressions made using conventional alginate and self-disinfecting alginate. MATERIALS AND METHODS: A total of 30 impressions of stainless steel die were made, out of which 15 impressions were made with conventional alginate and 15 were made with self-disinfecting alginate and poured using Type III dental stone...
November 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/29098957/efficient-adsorption-of-multiple-heavy-metals-with-tailored-silica-aerogel-like-materials
#9
João P Vareda, Luisa Durães
Recently developed tailored adsorbents for heavy metal uptake are studied in batch tests with Cu, Pb, Cd, Ni, Cr and Zn, in order to decontaminate polluted environments where these heavy metals are found in solution - water courses and groundwater. The adsorbents feature mercapto or amine-mercapto groups that are capable of complexating the cations. Through the use of equilibrium tests it is found that a remarkably high heavy metal uptake is obtained for all metals (ranging from 84 mg/g to 140 mg/g). These uptake values are quite impressive when compared to other adsorbents reported in the literature, which is also due to the double functionalization present in one of the adsorbents...
November 3, 2017: Environmental Technology
https://www.readbyqxmd.com/read/29097699/clinical-evaluation-of-final-impressions-from-three-dimensional-printed-custom-trays
#10
Yuchun Sun, Hu Chen, Hong Li, Kehui Deng, Tian Zhao, Yong Wang, Yongsheng Zhou
This study aimed to evaluate the quality of the final impressions taken by three-dimensional printed custom trays for edentulous patients. Custom trays were designed with or without saddle-shaped tissue stops and fabricated by three-dimensional printing techniques. Manually made trays with photocurable materials were produced as controls. Both 3D printed custom trays and manually made ones were used to take impressions from edentulous patients. After 3D scanning of the final impression, the impression materials were removed, thus the underneath tray surfaces were able to be scanned, allowing the thickness of the impression materials to be measured...
November 2, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29095146/apcvd-hexagonal-boron-nitride-thin-films-for-passive-near-junction-thermal-management-of-electronics
#11
Pratik Kc, Amit Rai, Taylor S Ashton, Arden Moore
The ability of graphene to serve as an ultrathin heat spreader has been previously demonstrated with impressive results. However, graphene is electrically conductive, making its use in contact with electronic devices problematic from a reliability and integration perspective. As an alternative, hexagonal boron nitride (h-BN) is a similarly structured material with large in-plane thermal conductivity but which possesses a wide band gap, thereby giving it potential to be utilized for directing contact, near-junction thermal management of electronics without shorting or the need for an insulating intermediate layer...
November 2, 2017: Nanotechnology
https://www.readbyqxmd.com/read/29078161/an-evaluation-of-the-discriminating-power-of-an-integrated-ballistics-identification-system-%C3%A2-heritage%C3%A2-system-with-the-nist-standard-cartridge-case-standard-reference-material-2461
#12
Keith B Morris, Eric F Law, Roger L Jefferys, Elizabeth C Dearth, Emily B Fabyanic
Through analysis and comparison of firing pin, breech face, and ejector impressions, where appropriate, firearm examiners may connect a cartridge case to a suspect firearm with a certain likelihood in a criminal investigation. When a firearm is not present, an examiner may use the Integrated Ballistics Identification System (IBIS(®)), an automated search and retrieval system coupled with the National Integrated Ballistics Information Network (NIBIN), a database of images showing the markings on fired cartridge cases and bullets from crime scenes along with test fired firearms...
October 14, 2017: Forensic Science International
https://www.readbyqxmd.com/read/29074955/harnessing-mechanical-instabilities-at-the-nanoscale-to-achieve-ultra-low-stiffness-metals
#13
Samuel Temple Reeve, Alexis Belessiotis-Richards, Alejandro Strachan
Alloy and microstructure optimization have led to impressive improvements in the strength of engineering metals, while the range of Young's moduli achievable has remained essentially unchanged. This is because stiffness is insensitive to microstructure and bounded by individual components in composites. Here we design ultra-low stiffness in fully dense, nanostructured metals via the stabilization of a mechanically unstable, negative stiffness state of a martensitic alloy by its coherent integration with a compatible, stable second component...
October 26, 2017: Nature Communications
https://www.readbyqxmd.com/read/29068542/in-situ-coupling-strategy-for-the-preparation-of-feco-alloys-and-co4-n-hybrid-for-highly-efficient-oxygen-evolution
#14
Xiang Zhu, Tian Jin, Chengcheng Tian, Chenbao Lu, Xiaoming Liu, Min Zeng, Xiaodong Zhuang, Shize Yang, Lin He, Honglai Liu, Sheng Dai
An in situ coupling approach is developed to create a new highly efficient and durable cobalt-based electrocatalyst for the oxygen evolution reaction (OER). Using a novel cyclotetramerization, a task-specific bimetallic phthalocyanine-based nanoporous organic framework is successfully built as a precursor for the carbonization synthesis of a nonprecious OER electrocatalyst. The resultant material exhibits an excellent OER activity with a low overpotential of 280 mV at a current density of 10 mA cm(-2) and high durability in an alkaline medium...
October 25, 2017: Advanced Materials
https://www.readbyqxmd.com/read/29057519/progress-and-opportunities-in-soft-photonics-and-biologically-inspired-optics
#15
REVIEW
Mathias Kolle, Seungwoo Lee
Optical components made fully or partially from reconfigurable, stimuli-responsive, soft solids or fluids-collectively referred to as soft photonics-are poised to form the platform for tunable optical devices with unprecedented functionality and performance characteristics. Currently, however, soft solid and fluid material systems still represent an underutilized class of materials in the optical engineers' toolbox. This is in part due to challenges in fabrication, integration, and structural control on the nano- and microscale associated with the application of soft components in optics...
October 23, 2017: Advanced Materials
https://www.readbyqxmd.com/read/29054679/cost-effectiveness-analysis-of-two-impression-methods-for-the-fabrication-of-mandibular-complete-dentures
#16
Anna Miyayasu, Manabu Kanazawa, Ayami Jo, Yusuke Sato, Shunsuke Minakuchi
OBJECTIVES: To compare the cost and to evaluate cost-effectiveness of fabricating mandibular complete dentures (CDs) using two different impression methods. METHODS: A crossover randomized controlled trial including 27 edentulous participants was performed. Mandibular CDs were fabricated using two different impression methods, as follows: (i) conventional method using a custom tray border moulded with impression compound and silicone and (ii) simplified method using a stock tray and alginate...
October 17, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/29049538/3d-printed-mitral-valve-models-affordable-simulation-for-robotic-mitral-valve-repair
#17
Ned Premyodhin, Divneet Mandair, Alice S Ferng, Timothy S Leach, Ryan P Palsma, Mohammad Z Albanna, Zain I Khalpey
OBJECTIVES: 3D printed mitral valve (MV) models that capture the suture response of real tissue may be utilized as surgical training tools. Leveraging clinical imaging modalities, 3D computerized modelling and 3D printing technology to produce affordable models complements currently available virtual simulators and paves the way for patient- and pathology-specific preoperative rehearsal. METHODS: We used polyvinyl alcohol, a dissolvable thermoplastic, to 3D print moulds that were casted with liquid platinum-cure silicone yielding flexible, low-cost MV models capable of simulating valvular tissue...
July 31, 2017: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/29048872/high-rate-performing-in-situ-nitrogen-enriched-spherical-carbon-particles-for-li-na-ion-cells
#18
Vadivel Selvamani, Sivalingam Gopi, Venkatachalam Rajagopal, Murugavel Kathiresan, Suryanarayanan Vembu, David Velayutham, Sukumaran Gopukumar
Nitrogen rich, porous spherical carbon particle with the large surface area was synthesized by simple pyrolysis of the amorphous covalent organic framework. The obtained mesoporous spherical carbon particles with dilated interlayer distance (0.377 nm), large surface area (390 m(2) g(-1)) and high level nitrogen doping (10.9%) offer eminent electrochemical performance as an anode for both lithium ion (LIBs) and sodium ion batteries (SIBs). In LIB applications, the synthesized material delivers an average reversible capacity of 820 mAh g(-1) after 100 cycles at 0...
November 1, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29044989/intercalating-ti2-nb14-o39-anode-materials-for-fast-charging-high-capacity-and-safe-lithium-ion-batteries
#19
Chunfu Lin, Shengjue Deng, David J Kautz, Zhihao Xu, Tao Liu, Jianbao Li, Ning Wang, Feng Lin
Ti-Nb-O binary oxide materials represent a family of promising intercalating anode materials for lithium-ion batteries. In additional to their excellent capacities (388-402 mAh g(-1) ), these materials show excellent safety characteristics, such as an operating potential above the lithium plating voltage and minimal volume change. Herein, this study reports a new member in the Ti-Nb-O family, Ti2 Nb14 O39 , as an advanced anode material. Ti2 Nb14 O39 porous spheres (Ti2 Nb14 O39 -S) exhibit a defective shear ReO3 crystal structure with a large unit cell volume and a large amount of cation vacancies (0...
October 17, 2017: Small
https://www.readbyqxmd.com/read/29043779/reinforcing-germanium-electrode-with-polymer-matrix-decoration-for-long-cycle-life-rechargeable-lithium-ion-batteries
#20
Xiaolei Sun, Xueyi Lu, Shaozhuan Huang, Lixia Xi, Lixiang Liu, Bo Liu, Qunhong Weng, Lin Zhang, Oliver G Schmidt
Germanium is a promising anode material for lithium ion batteries because of its high theoretical specific capacity and low operation voltage. However, a significant challenge in using Ge-based anodes is the large volume variation during cycling that causes pulverization and capacity fade. Despite intense studies in the past decade, unsatisfactory cycling stability of the Ge-based electrodes still impedes their widespread applications. In this study, we demonstrate a high-performance electrode through the synergistic combination of a high-capacity Ge film grown on a three-dimensional current collector and an in situ formed poly(vinylidene fluoride)-hexafluoropropene/SiO2 protective layer...
November 8, 2017: ACS Applied Materials & Interfaces
keyword
keyword
92349
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"