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https://www.readbyqxmd.com/read/28088072/microstructural-mechanical-and-corrosion-characteristics-of-heat-treated-mg-1-2zn-0-5ca-wt-alloy-for-use-as-resorbable-bone-fixation-material
#1
Hamdy Ibrahim, Andrew D Klarner, Behrang Poorganji, David Dean, Alan A Luo, Mohammad Elahinia
Mg-Zn-Ca alloys have grabbed most of the recent attention in research attempting to develop an Mg alloy for bone fixation devices due to their superior biocompatibility. However, early resorption and insufficient strength remain the main problems that hinder their use. Heat treatment has previously been thoroughly studied as a post-shaping process, especially after the fabrication of complex parts (e.g. porous structures) by 3D-printing or powder metallurgy. In this work, the effect of heat treatment on Mg-1...
January 5, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28087979/rapid-antidepressant-effect-of-ketamine-correlates-with-astroglial-plasticity-in-the-hippocampus
#2
Maryam Ardalan, Ali H Rafati, Jens R Nyengaard, Gregers Wegener
BACKGROUND AND PURPOSE: Astroglia contributes to the pathophysiology of major depression and the action of antidepressant drugs through modulating synaptic plasticity; therefore, present study investigated whether fast antidepressant action of ketamine is reflected in the rapid alteration of the astrocytes morphology in a genetic animal model of depression. EXPERIMENTAL APPROACH: S-Ketamine (15 mg/kg) or saline was administered as a single injection to Flinders Line (FSL/FRL) rats...
January 14, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28087434/bone-grafting-of-atlantoaxial-joints-and-occipitocervical-or-atlantoaxial-fusion-for-the-reduction-and-fixation-of-basilar-invagination-with-atlantoaxial-dislocation-by-a-posterior-approach-a-preliminary-study
#3
Xin He, Yibin Meng, Jianan Zhang, Yunfei Hang, Junsong Yang, Qining Wu, Dingjun Hao
No abstract text is available yet for this article.
January 10, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28087402/accuracy-is-in-the-eyes-of-the-pathologist-the-visual-interpretive-process-and-diagnostic-accuracy-with-digital-whole-slide-images
#4
Tad T Brunyé, Ezgi Mercan, Donald L Weaver, Joann G Elmore
Digital whole slide imaging is an increasingly common medium in pathology, with application to education, telemedicine, and rendering second opinions. It has also made it possible to use eye tracking devices to explore the dynamic visual inspection and interpretation of histopathological features of tissue while pathologists review cases. Using whole slide images, the present study examined how a pathologist's diagnosis is influenced by fixed case-level factors, their prior clinical experience, and their patterns of visual inspection...
January 10, 2017: Journal of Biomedical Informatics
https://www.readbyqxmd.com/read/28087232/comparison-of-medial-malleolar-fracture-healing-at-8%C3%A2-weeks-after-open-reduction-internal-fixation-versus-percutaneous-fixation-a%C3%A2-retrospective-cohort-study
#5
Glenn M Weinraub, Patrick Levine, Eric Shi, Aarron Flowers
Unstable medial malleolar fractures are treated with either standard open reduction internal fixation (ORIF) or a percutaneous approach. The percutaneous approach avoids the potentially excessive soft tissue dissection associated with an open approach but can also result in inadequate anatomic reduction. No studies have compared the incidence of radiographic healing of medial malleolar fractures between an open approach and percutaneous fixation. A retrospective comparative study was performed at a single institution across multiple sites...
January 10, 2017: Journal of Foot and Ankle Surgery: Official Publication of the American College of Foot and Ankle Surgeons
https://www.readbyqxmd.com/read/28086947/quantifying-growing-versus-non-growing-ovarian-follicles-in-the-mouse
#6
Bahar Uslu, Carola Conca Dioguardi, Monique Haynes, De-Qiang Miao, Meltem Kurus, Gloria Hoffman, Joshua Johnson
BACKGROUND: A standard histomorphometric approach has been used for nearly 40 years that identifies atretic (e.g., dying) follicles by counting the number of pyknotic granulosa cells (GC) in the largest follicle cross-section. This method holds that if one pyknotic granulosa nucleus is seen in the largest cross section of a primary follicle, or three pyknotic cells are found in a larger follicle, it should be categorized as atretic. Many studies have used these criteria to estimate the fraction of atretic follicles that result from genetic manipulation or environmental insult...
January 13, 2017: Journal of Ovarian Research
https://www.readbyqxmd.com/read/28081236/a-key-marine-diazotroph-in-a-changing-ocean-the-interacting-effects-of-temperature-co2-and-light-on-the-growth-of-trichodesmium-erythraeum-ims101
#7
Tobias G Boatman, Tracy Lawson, Richard J Geider
Trichodesmium is a globally important marine diazotroph that accounts for approximately 60 - 80% of marine biological N2 fixation and as such plays a key role in marine N and C cycles. We undertook a comprehensive assessment of how the growth rate of Trichodesmium erythraeum IMS101 was directly affected by the combined interactions of temperature, pCO2 and light intensity. Our key findings were: low pCO2 affected the lower temperature tolerance limit (Tmin) but had no effect on the optimum temperature (Topt) at which growth was maximal or the maximum temperature tolerance limit (Tmax); low pCO2 had a greater effect on the thermal niche width than low-light; the effect of pCO2 on growth rate was more pronounced at suboptimal temperatures than at supraoptimal temperatures; temperature and light had a stronger effect on the photosynthetic efficiency (Fv/Fm) than did CO2; and at Topt, the maximum growth rate increased with increasing CO2, but the initial slope of the growth-irradiance curve was not affected by CO2...
2017: PloS One
https://www.readbyqxmd.com/read/28080114/oculomotor-and-linguistic-processing-effects-in-reading-dynamic-horizontally-scrolling-text
#8
Hannah Harvey, Hayward J Godwin, Gemma Fitzsimmons, Simon P Liversedge, Robin Walker
Two experiments are reported investigating oculomotor behavior and linguistic processing when reading dynamic horizontally scrolling text (compared to reading normal static text). Three factors known to modulate processing time in normal reading were investigated: Word length and word frequency were examined in Experiment 1, and target word predictability in Experiment 2. An analysis of global oculomotor behavior across the 2 experiments showed that participants made fewer and longer fixations when reading scrolling text, with shorter progressive and regressive saccades between these fixations...
January 12, 2017: Journal of Experimental Psychology. Human Perception and Performance
https://www.readbyqxmd.com/read/28079807/a-case-report-distal-humeral-diaphyseal-fracture-in-a-child
#9
Yuji Tomori, Takuya Sawaizumi, Mitsuhiko Nanno, Shinro Takai
RATIONALE: Distal humeral diaphyseal fractures are much less common than supracondylar humeral fractures. The triangular shape and thinner periosteum in the diaphyseal region than in the supracondylar region of the distal diaphysis makes the treatment of diaphyseal fractures difficult. Nonoperative treatment for this fracture is challenging and troublesome; thus, open reduction and internal fixation (OR/IF) is generally recommended. PATIENT CONCERNS: We herein report a distal humeral diaphyseal fracture in a child...
January 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28079741/management-of-pediatric-open-tibia-fractures-with-supracutaneous-locked-plates
#10
Veerappa N Radhakrishna, Vrisha Madhuri
We evaluated the novel application of supracutaneous locked plates in pediatric open tibia fractures. Pediatric open tibia fractures stabilized with a locked supracutaneous plate from January 2011 to December 2014 were reviewed. Twenty-eight children, mean age 8.9 years, with 29 open tibia fractures were included. Nine of these children who had metaphyseal or metadiaphyseal fractures did not require joint spanning. The mean follow-up duration was 13.5 months. The mean time to uneventful union was 11.46 weeks, with no unacceptable malunion...
January 10, 2017: Journal of Pediatric Orthopedics. Part B
https://www.readbyqxmd.com/read/28079739/opinion-survey-of-members-of-british-society-of-children-s-orthopaedic-surgery-related-to-specific-case-scenarios-in-slipped-capital-femoral-epiphysis
#11
Bakur A Jamjoom, Daniel Butler, Simon Thomas, Manoj Ramachandran, Stephen Cooke
The aim of this study was to assess contemporary management of slipped capital femoral epiphysis (SCFE) by surveying members of the British Society of Children's Orthopaedic Surgery (BSCOS). A questionnaire with five case vignettes was used. Two questions examined the timing of surgery for an acute unstable SCFE in a child presenting at 6 and 48 h after start of symptoms. Two further questions explored the preferred method of fixation in mild and severe stable SCFE. The final question examined the management of the contralateral normal hip...
January 10, 2017: Journal of Pediatric Orthopedics. Part B
https://www.readbyqxmd.com/read/28079731/midterm-radiographic-and-functional-outcomes-of-the-anterior-internal-pelvic-fixator-infix
#12
Rahul Vaidya, Adam Jonathan Martin, Matthew Roth, Frederick Tonnos, Bryant Oliphant, Jon Carlson
OBJECTIVE: To describe our experience using the anterior internal pelvic fixator (INIFX) for treating pelvic ring injuries. DESIGN: Case Series SETTING:: Level 1 Trauma Center PATIENTS:: Eighty-three patients with pelvic ring injuries treated with INFIX. Follow up avg. 35 months (range 12-80.33) INTERVENTION:: Surgical treatment of pelvic ring injuries included reduction, appropriate posterior fixation, and INFIX placement. OUTCOME MEASUREMENTS: Reduction using the pelvic deformity index (PDI) and pubic symphysis(PS) widening, Majeed functional scores, complications; infection, implant failure, heterotopic ossification (HO), nerve injury, and pain...
January 5, 2017: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/28079680/middle-ear-sound-transmission-under-normal-damaged-repaired-and-reconstructed-conditions
#13
Wei Dong, Ying Tian, Xin Gao, Timothy T K Jung
HYPOTHESIS: We hypothesize that current clinical treatment strategies for the disarticulated or eroded incus have the effect of combining the incus and stapes of the human middle ear (ME) into one rigid structure, which, while capable of adequately transmitting lower-frequency sounds, fails for higher frequencies. BACKGROUND: ME damage causes conductive hearing loss (CHL) and while great progress has been made in repairing or reconstructing damaged MEs, the outcomes are often far from ideal...
January 10, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28079306/open-dislocation-of-ankle-without-fracture-treated-with-an-external-fixator
#14
Emrah Sayit, Asli Tanrivermis Sayit, Elcin Zan
Ankle dislocations are orthopedic emergencies that require immediate treatment to avoid neurovascular impairment. They are usually accompanied by one or more comminuted fractures of the ankle mortis. In rare circumstances, such as high-energy trauma, the ankle dislocations may not be accompanied by concomitant malleolar fractures and, thus, are named "pure ankle dislocations". We presented a very rare and interesting case of an open medial dislocation of the ankle without associated fracture in an 18-year-old man with no known predisposing risk factors...
January 12, 2017: Orthopaedic Surgery
https://www.readbyqxmd.com/read/28079062/does-retinal-configuration-make-the-head-and-eyes-of-foveate-birds-move
#15
Bret A Moore, Luke P Tyrrell, Diana Pita, Olaf R P Bininda-Emonds, Esteban Fernández-Juricic
Animals move their heads and eyes to compensate for movements of the body and background, search, fixate, and track objects visually. Avian saccadic head/eye movements have been shown to vary considerably between species. We tested the hypothesis that the configuration of the retina (i.e., changes in retinal ganglion cell density from the retinal periphery to the center of acute vision-fovea) would account for the inter-specific variation in avian head/eye movement behavior. We characterized retinal configuration, head movement rate, and degree of eye movement of 29 bird species with a single fovea, controlling for the effects of phylogenetic relatedness...
January 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28078975/the-uniformity-illusion
#16
Marte Otten, Yair Pinto, Chris L E Paffen, Anil K Seth, Ryota Kanai
Vision in the fovea, the center of the visual field, is much more accurate and detailed than vision in the periphery. This is not in line with the rich phenomenology of peripheral vision. Here, we investigated a visual illusion that shows that detailed peripheral visual experience is partially based on a reconstruction of reality. Participants fixated on the center of a visual display in which central stimuli differed from peripheral stimuli. Over time, participants perceived that the peripheral stimuli changed to match the central stimuli, so that the display seemed uniform...
January 2017: Psychological Science
https://www.readbyqxmd.com/read/28078542/glenoid-baseplate-fixation-using-hybrid-configurations-of-locked-and-unlocked-peripheral-screws
#17
Nathan T Formaini, Nathan G Everding, Jonathan C Levy, Brandon G Santoni, Aniruddh N Nayak, Cooper Wilson
BACKGROUND: The use of peripheral locked screws has reduced glenoid baseplate failure rates in reverse shoulder arthroplasty. However, situations may arise when one or more non-locked screws may be preferred. We aimed to determine if different combinations of locked and non-locked screws significantly alter acute glenoid baseplate fixation in a laboratory setting. MATERIALS AND METHODS: Twenty-eight polyurethane trabecular bone surrogates were instrumented with a center screw-type glenoid baseplate and fixated with various combinations of peripheral locked and non-locked screws (1-, 2-, 3- and 4-locked con)...
January 11, 2017: Journal of Orthopaedics and Traumatology: Official Journal of the Italian Society of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/28078473/traumatic-atlantoaxial-rotatory-fixation-in-an-adult-patient
#18
María A García-Pallero, Cristina V Torres, Juan Delgado-Fernández, R G Sola
INTRODUCTION: Atlantoaxial rotational fixation (AARF) is a rare entity in adults, with only a few cases reported in the English literature and often associated with a traumatic mechanism. It is an underdiagnosed condition that must be taken into account in the initial assessment of all craniocervical trauma. Both diagnostic and therapeutic delay may be a potential cause of severe neurological damage or even death of the patient. The therapeutic management is controversial given the difficulty of achieving optimum stability and permanent reduction...
January 11, 2017: European Spine Journal
https://www.readbyqxmd.com/read/28078439/liquid-based-versus-conventional-cytology-of-oral-brush-biopsies-a-split-sample-pilot-study
#19
T W Remmerbach, N Pomjanski, U Bauer, H Neumann
OBJECTIVE: The aim of this prospective split sample study was to evaluate the applicability of liquid-based cytology (LBC) of oral brush biopsies for detection of oral cancer. METHODS: Two different preparation techniques were investigated: the conventional transfer procedure to glass slides and the LBC preparation method. The obtainments of epithelial cells were performed five times with a nylon brush and transferred onto five glass slides. Additionally, the brushes, which were normally discarded, were stored in a fixative solution...
January 11, 2017: Clinical Oral Investigations
https://www.readbyqxmd.com/read/28078398/potential-coupling-effects-of-ammonia-oxidizing-and-anaerobic-ammonium-oxidizing-bacteria-on-completely-autotrophic-nitrogen-removal-over-nitrite-biofilm-formation-induced-by-the-second-messenger-cyclic-diguanylate
#20
Chao Wang, Sitong Liu, Xiaochen Xu, Chuanqi Zhao, Fenglin Yang, Dong Wang
The objective of this study was to investigate the influence of extracellular polymeric substance (EPS) on the coupling effects between ammonia-oxidizing bacteria (AOB) and anaerobic ammonium-oxidizing (anammox) bacteria for the completely autotrophic nitrogen removal over nitrite (CANON) biofilm formation in a moving bed biofilm reactor (MBBR). Analysis of the quantity of EPS and cyclic diguanylate (c-di-GMP) confirmed that the contents of polysaccharides and c-di-GMP were correlated in the AOB sludge, anammox sludge, and CANON biofilm...
January 11, 2017: Applied Microbiology and Biotechnology
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