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https://www.readbyqxmd.com/read/28081288/short-dental-implants-6-mm-versus-long-dental-implants-11-15-mm-in-combination-with-sinus-floor-elevation-procedures-3-year-results-from-a-multi-center-randomized-controlled-clinical-trial
#1
Veronika Pohl, Daniel S Thoma, Katarzyna Sporniak-Tutak, Abel Garcia-Garcia, Thomas D Taylor, Robert Haas, Christoph H F Hämmerle
AIM: To test whether or not the use of short dental implants (6 mm) results in an implant survival rate similar to that with longer implants (11-15 mm) in combination with sinus grafting. METHODS: This multi-center study enrolled 101 patients with partial edentulism in the posterior maxilla and a remaining bone height of 5-7 mm. Included patients were randomly assigned to receive short implants (6 mm; GS / group short) or long implants (11-15 mm) simultaneously with sinus grafting (GG / group graft)...
January 12, 2017: Journal of Clinical Periodontology
https://www.readbyqxmd.com/read/28081013/magneto-photoluminescence-measurements-of-tungsten-disulphide-monolayers
#2
Jan Kuhnert, Arash Rahimi-Iman, Wolfram Heimbrodt
Layered transition-metal dichalcogenides have attracted great interest in the last few years. Thinned down to the monolayer limit they change from an indirect band structure to a direct band gap in the visible region. Due to the monolayer thickness the inversion symmetry of the crystal is broken and spin and valley are coupled to each other. The degeneracy between the two equivalent valleys, K and K', respectively, can be lifted by applying an external magnetic field. Here, we present photoluminescence measurements of CVD-grown tungsten disulphide (WS2) monolayers at temperatures of 2 K...
January 12, 2017: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/28080027/asymmetric-pentagonal-metal-meshes-for-flexible-transparent-electrodes-and-heaters
#3
Daniel Lordan, Micheal Burke, Mary Manning, Alfonso Martin, Andreas Amann, Dan O' Connell, Richard Murphy, Colin Lyons, Aidan J Quinn
Metal meshes have emerged as an important class of flexible transparent electrodes. We report on the characteristics of a new class of asymmetric meshes, tiled using a recently-discovered family of pentagons. Micron-scale meshes were fabricated on flexible polyethylene terephthalate substrates via optical lithography, metal evaporation (Ti 10 nm, Pt 50 nm) and lift-off. Three different designs were assessed, each with the same tessellation pattern and linewidth (5 µm), but with different sizes of the fundamental pentagonal unit...
January 12, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28079564/an-anesthesiologist-s-perspective-on-the-history-of-basic-airway-management-the-artisanal-anesthetic-era-1846-to-1904
#4
Adrian A Matioc
This second installment of the history of basic airway management covers the early-artisanal-years of anesthesia from 1846 to 1904. Anesthesia was invented and practiced as a supporting specialty in the context of great surgical and medical advances. The current-day anesthesia provider tends to equate the history of airway management with the history of intubation, but for the first 58 yr after the introduction of ether anesthesia, airway management was provided by basic airway techniques with or without the use of a face mask...
January 12, 2017: Anesthesiology
https://www.readbyqxmd.com/read/28078337/a-solvable-model-of-axisymmetric-and-non-axisymmetric-droplet-bouncing
#5
Matthew Andrew, Julia M Yeomans, Dmitri O Pushkin
We introduce a solvable Lagrangian model for droplet bouncing. The model predicts that, for an axisymmetric drop, the contact time decreases to a constant value with increasing Weber number, in qualitative agreement with experiments, because the system is well approximated as a simple harmonic oscillator. We introduce asymmetries in the velocity, initial droplet shape, and contact line drag acting on the droplet and show that asymmetry can often lead to a reduced contact time and lift-off in an elongated shape...
January 12, 2017: Soft Matter
https://www.readbyqxmd.com/read/28078071/electrical-stimulation-to-reduce-the-overload-in-upper-limbs-during-sitting-pivot-transfer-in-paraplegic-a-preliminary-study
#6
Ana Claudia G Lopes, Claudia Ochoa-Diaz, Roberto S Baptista, Lucas O Fonseca, Charles Fattal, Christine Azevedo Coste, Antônio P L Bó, Emerson Fachin-Martins
Transfer is a key ability and allows greater interact with the environment and social participation. Conversely, paraplegics have great risk of pain and injury in the upper limbs due to joint overloads during activities of daily living, like transfer. The main goal of this study is to verify if the use of functional electrical stimulation (FES) in the lower limbs of paraplegic individuals can assist the sitting pivot transfer (SPT). The secondary objective is to verify if there is a greater participation of the lower limbs during lift pivot phase...
September 15, 2016: European Journal of Translational Myology
https://www.readbyqxmd.com/read/28075136/theoretical-investigation-of-the-interfaces-and-mechanisms-of-induced-spin-polarization-of-1d-narrow-zigzag-graphene-and-h-bn-nanoribbons-on-a-sro-terminated-lsmo-001-surface
#7
Paul Avramov, Alexander A Kuzubov, Artem V Kuklin, Hyosun Lee, Evgenia A Kovaleva, Seiji Sakai, Shiro Entani, Hiroshi Naramoto, Pavel B Sorokin
The structure of the interfaces and the mechanisms of induced spin polarization of 1D infinite and finite narrow graphene- and h-BN zigzag nanoribbons placed on a SrO-terminated La1-xSrxMnO3 (LSMO) (001) surface were studied using density functional theory (DFT) electronic structure calculations. It was found that the π-conjugated nanofragments are bonded to the LSMO(001) surface by weak disperse interactions. The types of coordination of the fragments, the strength of bonding, and the rate of spin polarization depend upon the nature of the fragments...
January 11, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28073261/insulating-nanomagnets-driven-by-spin-torque
#8
Matthias B Jungfleisch, Junjia Ding, Wei Zhang, Wanjun Jiang, John E Pearson, Valentine Novosad, Axel Hoffmann
Magnetic insulators, such as yttrium iron garnet (Y3Fe5O12), are ideal materials for ultralow power spintronics applications due to their low energy dissipation and efficient spin current generation and transmission. Recently, it has been realized that spin dynamics can be driven very effectively in micrometer-sized Y3Fe5O12/Pt heterostructures by spin-Hall effects. We demonstrate here the excitation and detection of spin dynamics in Y3Fe5O12/Pt nanowires by spin-torque ferromagnetic resonance. The nanowires defined via electron-beam lithography are fabricated by conventional room temperature sputtering deposition on Gd3Ga5O12 substrates and lift-off...
January 11, 2017: Nano Letters
https://www.readbyqxmd.com/read/28070235/bevacizumab-and-gastrointestinal-bleeding-in-hereditary-hemorrhagic-telangiectasia
#9
George Ou, Cherry Galorport, Robert Enns
We report a case of severe, refractory gastrointestinal (GI) bleeding in a patient with hereditary hemorrhagic telangiectasia (HHT) whose massive transfusion dependence was lifted shortly after treatment with bevacizumab, an anti-vascular endothelial growth factor. The patient's bleeding had been refractory to repeated endoscopic interventions, tranexamic acid, and tamoxifen. However, following treatment with bevacizumab at 5 mg/kg every other week, nearly 300 units of packed red blood cell transfusions were avoided in one year's time...
December 27, 2016: World Journal of Gastrointestinal Surgery
https://www.readbyqxmd.com/read/28069513/structure-and-mechanical-implications-of-the-pectoral-fin-skeleton-in-the-longnose-skate-chondrichthyes-batoidea
#10
Wei Huang, Watcharapong Hongjamrassilp, Jae-Young Jung, Philip A Hastings, Vlado A Lubarda, Joanna McKittrick
Animal propulsion systems are believed to show high energy and mechanical efficiency in assisting movement compared to artificial designs. As an example, batoid fishes have very light cartilaginous skeletons that facilitate their elegant swimming via enlarged wing-like pectoral fins. The aim of this work is to illustrate the hierarchical structure of the pectoral fin of a representative batoid, the Longnose Skate (Raja rhina), and explain the mechanical implications of its structural design. At the macro level, the pectoral fins are comprised of radially oriented fin rays, formed by staggered mineralized skeletal elements stacked end-to-end...
January 6, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28068753/retrospective-matched-pair-cohort-study-on-effect-of-bisegmental-fenestration-versus-hemilaminectomy-for-bisegmental-spinal-canal-stenosis-at-l3-l4-and-l4-l5
#11
Julia Schüppel, Friedrich Weber
Background The main symptoms of degenerative lumbar spinal canal stenosis are progressive back pain, spinal claudication, and, occasionally, sensory and motor deficits. Impairments particularly occur during walking, standing, and sitting. Thus social and vocational activities are increasingly restricted, causing considerable suffering for patients. Surgical therapies are superior to conservative ones. This article studies the outcome of 2-level fenestration versus hemilaminectomy for bisegmental spinal stenosis decompression...
January 9, 2017: Journal of Neurological Surgery. Part A, Central European Neurosurgery
https://www.readbyqxmd.com/read/28068368/a-virtual-out-of-body-experience-reduces-fear-of-death
#12
Pierre Bourdin, Itxaso Barberia, Ramon Oliva, Mel Slater
Immersive virtual reality can be used to visually substitute a person's real body by a life-sized virtual body (VB) that is seen from first person perspective. Using real-time motion capture the VB can be programmed to move synchronously with the real body (visuomotor synchrony), and also virtual objects seen to strike the VB can be felt through corresponding vibrotactile stimulation on the actual body (visuotactile synchrony). This setup typically gives rise to a strong perceptual illusion of ownership over the VB...
2017: PloS One
https://www.readbyqxmd.com/read/28062962/necrotizing-fasciitis-in-aesthetic-surgery-a-review-of-the-literature
#13
REVIEW
Andrea Marchesi, Stefano Marcelli, Pier C Parodi, Rosario E Perrotta, Michele Riccio, Luca Vaienti
INTRODUCTION: Necrotizing fasciitis (NF) is a rare, potentially fatal, infective complication that can occur after surgery. Diagnosis is still difficult and mainly based on clinical data. Only a prompt pharmacological and surgical therapy can avoid dramatic consequences. There are few reports regarding NF as a complication after aesthetic surgical procedures, and a systematic review still lacks. MATERIALS AND METHODS: We have performed a systematic review of English literature on PubMed, covering a period of 30 years...
January 7, 2017: Aesthetic Plastic Surgery
https://www.readbyqxmd.com/read/28062121/instantaneous-centers-of-rotation-for-lumbar-segmental-extension-in-vivo
#14
Ameet Aiyangar, Liying Zheng, William Anderst, Xudong Zhang
The study aimed to map instantaneous centers of rotation (ICRs) of lumbar motion segments during a functional lifting task and examine differences across segments and variations caused by magnitude of weight lifted. Eleven healthy participants lifted loads of three different magnitudes (4.5, 9, and 13.5kg) from a trunk-flexed (~75°) to an upright position, while being imaged by a dynamic stereo X-ray (DSX) system. Tracked lumbar vertebral (L2-S1) motion data were processed into highly accurate 6DOF intervertebral (L2L3, L3L4, L4L5, L5S1) kinematics...
December 29, 2016: Journal of Biomechanics
https://www.readbyqxmd.com/read/28062043/subangstrom-measurements-of-enzyme-function-using-a-biological-nanopore-sprnt
#15
A H Laszlo, I M Derrrington, J H Gundlach
Nanopores are emerging as new single-molecule tools in the study of enzymes. Based on the progress in nanopore sequencing of DNA, a tool called Single-molecule Picometer Resolution Nanopore Tweezers (SPRNT) was developed to measure the movement of enzymes along DNA in real time. In this new method, an enzyme is loaded onto a DNA (or RNA) molecule. A single-stranded DNA end of this complex is drawn into a nanopore by an electrostatic potential that is applied across the pore. The single-stranded DNA passes through the pore's constriction until the enzyme comes into contact with the pore...
2017: Methods in Enzymology
https://www.readbyqxmd.com/read/28059781/wing-kinematics-measurement-and-aerodynamics-of-a-dragonfly-in-turning-flight
#16
Chengyu Li, Haibo Dong
This study integrates high-speed photogrammetry, three-dimensional surface reconstruction, and computational fluid dynamics to explore a dragonfly (Erythemis Simplicicollis) in free flight. Asymmetric wing kinematics and the associated aerodynamic characteristics of a turning dragonfly are analyzed in detail. Quantitative measurements of wing kinematics show that compared to the outer wings, the inner wings sweep more slowly with a higher angle of attack during the downstroke, whereas they flap faster with a lower angle of attack during the upstroke...
January 6, 2017: Bioinspiration & Biomimetics
https://www.readbyqxmd.com/read/28058512/a-novel-approach-for-robotic-mobilization-of-the-splenic-flexure
#17
O Isik, C Benlice, E Gorgun
BACKGROUND: The techniques of robotic splenic flexure mobilization in the colorectal surgery setting are not well defined and have been challenging due to limited range of motion of the second-generation robotic platform in multiple quadrants. METHODS: This report describes a novel technique for robotic splenic flexure mobilization with medial-to-lateral approach without a need for robotic cart repositioning during left-sided colon and rectal surgery. The dissection is started with ligation of the inferior mesenteric artery and vein...
January 5, 2017: Techniques in Coloproctology
https://www.readbyqxmd.com/read/28058080/cecal-leiomyoma-can-we-attempt-endoscopic-resection
#18
Kanthi Rekha Badipatla, Chandana Kamireddy, Masooma Niazi, Suresh Kumar Nayudu
Gastrointestinal leiomyomas are smooth muscle tumors arising from the muscularis mucosae, muscularis propriae and possibly from smooth muscle of the vessel wall. Management depends on the size, location and the clinical scenario. Endoscopic snare cauterization with or without saline lift has been described in literature for tumors involving the left colon. To the best of our knowledge, endoscopic resection of right colon leiomyoma was never attempted in the past. We present a case of cecal leiomyoma which was resected endoscopically...
December 2016: Gastroenterology Research
https://www.readbyqxmd.com/read/28051336/social-big-data-analysis-of-information-spread-and-perceived-infection-risk-during-the-2015-middle-east-respiratory-syndrome-outbreak-in-south-korea
#19
Juyoung Song, Tae Min Song, Dong-Chul Seo, Dal-Lae Jin, Jung Sun Kim
We investigated online diffusion of information, spread of fear, and perceived risk of infection to Middle East Respiratory Syndrome (MERS) as cases of MERS spread rapidly and dozens of fatalities occurred in South Korea in May-June of 2015. This study retrieved 8,671,695 MERS-related online documents from May 20 to June 18, 2015, from 171 Korean online channels and analyzed such documents by using multilevel models and data mining with Apriori algorithm association analysis. We used R software (version 3.2...
January 2017: Cyberpsychology, Behavior and Social Networking
https://www.readbyqxmd.com/read/28050978/prevalence-location-and-size-of-maxillary-sinus-septa-computed-tomography-scan-analysis
#20
Ferial Taleghani, Maryam Tehranchi, Shahryar Shahab, Zahra Zohri
INTRODUCTION: The present study was undertaken to evaluate the anatomy of the maxillary sinus in relation to its position and the height of its septa, using cone beam computed tomography (CBCT). MATERIALS AND METHODS: In this descriptive retrospective study, 300 CBCT images of maxillary sinuses of patients with posterior maxillary edentulism were evaluated. The maxillary sinus septa were evaluated in relation to their prevalence, height, and position; t-test and Mann-Whitney tests were used for the analysis of data...
January 1, 2017: Journal of Contemporary Dental Practice
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