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Spaceflight-induced changes in white matter hyperintensity burden in astronauts

Conclusions: Long-duration exposure to microgravity is associated with an increase in periventricular WMH in astronauts. This increase was linked to an increase in ventricular CSF volume documented in ISS astronauts. There was no associated change in or abnormal levels of WMH volumes in deep white matter as reported in U-2 high-altitude pilots.
Source: Neurology - Category: Neurology Authors: Tags: MRI, Volumetric MRI, Case control studies ARTICLE Source Type: research

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This study aimed to compare the vertical marginal gap of teeth restored with lithium disilicate crowns fabricated using CAD/CAM or by pressed ceramic approach. Twenty mandibular third molar teeth were collected after surgical extractions and prepared to receive full veneer crowns. Teeth were optically scanned and lithium disilicate blocks were used to fabricate crowns using CAD/CAM technique. Polyvinyl siloxane impressions of the prepared teeth were made and monolithic pressed lithium disilicate crowns were fabricated. The marginal gap was measured using optical microscope at 200 × magnification (Keyence VHX-5000, Ja...
Source: Brazilian Oral Research - Category: Dentistry Source Type: research
Topcon Medical Systems said today that its DRI OCT Triton Series system won 510(k) clearance from the FDA. The company’s ocular diagnostic instrument features a built-in retinal camera, eye-tracking and a 1 micron, 1050 nm light source with a scanning speed of 100,000 A-scans/second. Topcon’s touted its system as being able to quickly penetrate ocular tissues without being obscured by hemorrhage or media opacities. It also includes widefield OCT scanning with a reference database. Topcon added that the system displays high-resolution images with clear retinal vessel and macular mapping. “Swept Source OCT ...
Source: Mass Device - Category: Medical Devices Authors: Tags: 510(k) Food & Drug Administration (FDA) Optical/Ophthalmic Regulatory/Compliance Topcon Source Type: news
Journal of Dental SciencesAvailable online 17 January 2018In Press, Corrected Proof—Note to usersAbstractBackground/purposeStreptococcus mutans is an important pathogen in the development of dental caries. Many studies have focused on the relationship between nicotine andS. mutans in vitro. The aim of this study was to investigate the effect of nicotine on the growth ofS. mutans and its cariogenic potentialin vivo.Materials and methodsSixteen male Specific-pathogen-free Wistar rats were divided into 2 groups (nicotine-treated and nicotine-untreated group) and infected withS. mutans. TheS.&nbs...
Source: Dental Technology Blog - Category: Dentistry Source Type: news
Chem. Commun., 2018, Accepted Manuscript DOI: 10.1039/C8CC00090E, CommunicationPatrick Schaeffer, Samuel Askin, Thomas Bond, Alanna Sorenson, Morgane Moreau, Helma Antony, Rohan A Davis High-throughput differential scanning fluorimetry of GFP-tagged proteins (HT-DSF-GTP) was applied for the identification of novel enzyme inhibitors acting by a mechanism termed: selective protein unfolding (SPU). Four different protein targets... The content of this RSS Feed (c) The Royal Society of Chemistry
Source: RSC - Chem. Commun. latest articles - Category: Chemistry Authors: Source Type: research
More than 200 UK agencies that provide ‘CE’ safety labels may lose recognition after March 2019Highly specialised jobs in Britain assessing whether products ranging from MRI scanners to phones can carry the “CE” safety label could be at risk post-Brexit after the European commission put manufacturers on notice over future standards.In an official notice, the EC said the agencies that provide the safety certificates may not have their work recognised after 29 March 2019, unless an agreement can be reached.Continue reading...
Source: Guardian Unlimited Science - Category: Science Authors: Tags: Brexit UK news European Union Medical research Politics Science World news European commission Source Type: news
Conclusions: The mitral valve simulation can help the surgeon understand valve behaviour and anticipate the outcome of a procedure.
Source: The International Journal of Medical Robotics and Computer Assisted Surgery - Category: Surgery Authors: Tags: ORIGINAL ARTICLE Source Type: research
A case of a cow which was stick blown by the owner lead to different complicarions including stoppage of urine and scanty feces and most importantly it lead to refuse to sit. The cow always remained standimg and its vertebral column is showing clear bend towards right side. Temperature was 104F and a clear crepitation sound on palpating the area closely on both side of spine at the area of thoracic vertebrae. However the cow urinated at clinic later on but its lymph nodes were also larger... Cow with stick blowing history - clinicalexamination manifests crepitation and bend in spine
Source: Student Doctor Network - Category: Universities & Medical Training Authors: Source Type: forums
Scans before and after birth boost research on conditions such as autism and cerebral palsy
Source: FT.com - Drugs and Healthcare - Category: Pharmaceuticals Source Type: news
The objective of this study was to investigate the effects of bariatric surgery on intestinal fatty acid (FA) uptake and blood flow. Materials and methodsWe recruited 27 morbidly obese subjects of which 10 had type 2 diabetes and 15 healthy age‐matched controls. Intestinal blood flow and fatty acid uptake from circulation were measured during fasting state using positron emission tomography (PET). Obese subjects were restudied six months after bariatric surgery. The mucosal location of intestinal FA retention was verified in insulin resistant mice with autoradiography. ResultsCompared to lean subjects, morbidly obese sub...
Source: Diabetes, Obesity and Metabolism - Category: Endocrinology Authors: Tags: ORIGINAL ARTICLE Source Type: research
ConclusionsThe oscillation frequency of the tested side-to-side toothbrushes affected the biofilm reduction in an interdental space model.Clinical relevanceWithin a toothbrush, higher oscillation frequencies may lead to beneficial effects on interdental biofilm removal by noncontact brushing.
Source: Clinical Oral Investigations - Category: Dentistry Source Type: research
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