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Profiling of non-polar lipids in tears of contact lens wearers during the day.

Exp Eye Res 2021 Apr 10:108567. Epub 2021 Apr 10.

School of Optometry and Vision Science, University of New South Wales, Sydney, Australia. Electronic address:

Purpose: This study explored whether the non-polar lipids in the human tear fluid lipidome show diurnal variation with and without contact lens wear. It also addressed the relationship between changes in ocular comfort during the day with the level of non-polar lipids.

Methods: Tear samples were collected in the morning and evening with and without contact lenses using fine glass capillary tubes and were analysed by chip-based nano-electrospray ionization tandem mass spectrometric techniques. Read More

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Sex-Based Differences in Symptoms with Mouthguard Use Following Pediatric Sport-Related Concussion.

J Athl Train 2021 Apr 13. Epub 2021 Apr 13.

Children's Hospital of Eastern Ontario Research Institute, Ottawa, Canada.

Context: Current evidence regarding the protective effect of mouthguard use on symptom severity in children and adolescents who sustain sport-related concussions is insufficient to make clinical recommendations.

Objective: To compare the association between mouthguard-use and symptoms stratified by sex in the first 4-weeks after pediatric sport-related concussion. We hypothesized that mouthguard-use would be associated with lower symptoms. Read More

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Highly cross-linked polyethylene in primary total knee arthroplasty is associated with a lower rate of revision for aseptic loosening: a meta-analysis of 962,467 cases.

Arch Orthop Trauma Surg 2021 Apr 13. Epub 2021 Apr 13.

Stavros Niarchos Foundation Complex Joint Reconstruction Center, Hospital for Special Surgery, New York, NY, 10022, USA.

Background: The evolution in total knee arthroplasty (TKA) includes the highly cross-linked polyethylene (HXLPE) which has been reported as an effective manner to reduce the wear of the polyethylene and the osteolysis. The purpose of the present study is to synthesize the results of comparative studies between HXLPE and conventional polyethylenes and determine their effect in primary TKA.

Methods: The US National Library of Medicine (PubMed/MEDLINE) and the Cochrane Database of Systematic Reviews were queried for publications utilizing the following keywords: "cross-linked", "polyethylene", "HXLPE", "conventional", "total knee arthroplasty", "TKA", "total knee replacement" and "TKR" combined with Boolean operators AND and OR. Read More

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Treatment usage patterns of oral appliances for obstructive sleep apnea over the first 60 days: a cluster analysis.

J Clin Sleep Med 2021 Apr 13. Epub 2021 Apr 13.

Sleep Research Group, Charles Perkins Centre & Northern Clinical School, Faculty of Medicine and Health, University of Sydney, Camperdown, NSW, Australia.

Study Objectives: Oral appliance (OA) therapy usage can be objectively measured through temperature-sensing data chips embedded in the appliance. Initial reports of group data for short-term treatment usage suggest good nightly hours of usage. However, individual variability in treatment usage patterns has not been assessed. Read More

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Recovery via SfM photogrammetry of latent footprint impressions in carpet.

J Forensic Sci 2021 Apr 13. Epub 2021 Apr 13.

Department of Life and Environmental Sciences, Faculty of Science and Technology, Bournemouth University, Poole, UK.

Impression evidence retained in carpet is usually recovered, if at all, in two dimensions via a vertical photograph. Here, we show that recovery is also possible via SfM photogrammetry and this gives good quality results that allow digital measurements both in the x-y plane and by depth (z-axis). This study focuses on recovery from polypropylene carpets which are widespread due to their resistance to wear and low cost. Read More

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Central-to-peripheral corneal edema during wear of embedded-component contact lenses.

Cont Lens Anterior Eye 2021 Apr 9:101443. Epub 2021 Apr 9.

Vision Science Group, University of California, Berkeley, CA, 94720, United States; Chemical and Biomolecular Engineering Department, University of California, Berkeley, CA, 94720, United States. Electronic address:

Purpose: With active investigation underway for embedded-circuit contact lenses, safe oxygen supply of these novel lenses remains a question. Central-to-peripheral corneal edema for healthy eyes during wear of soft contact (SCL) and scleral lenses (SL) with embedding components is assessed.

Methods: Various 2-dimensional (2D) designs of SL and SCL with embedded components are constructed on Comsol Multiphysics 5. Read More

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Objective evaluation of static and dynamic behavior of different toric silicone-hydrogel contact lenses.

Cont Lens Anterior Eye 2021 Apr 9:101437. Epub 2021 Apr 9.

Ocular Surface and Contact Lens Research Laboratory, Faculty of Optics and Optometry, University of Santiago de Compostela, Spain.

Purpose: The present study aimed to estimate how orientation position, recovery time, and contact lens decentration, associated with visual performance, may vary on several designs of the most recent toric silicone-hydrogel toric contact lenses in two-time different moments.

Methods: To evaluate the toric silicone-hydrogel toric contact lens position and stability, it was conducted with a prospective, observational, randomized, and single-center case series including 95 astigmatic eyes wearing four toric silicone-hydrogel toric contact lenses for two weeks. Orientation and decentration were analyzed with ImageJ software from video-frames extracted with a Python application. Read More

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Online dental teaching practices during the COVID-19 pandemic: a cross-sectional online survey from China.

BMC Oral Health 2021 Apr 12;21(1):189. Epub 2021 Apr 12.

The Affiliated Hospital of Stomatology, School of Stomatology, Zhejiang University School of Medicine, and Key Laboratory of Oral Biomedical Research of Zhejiang Province, Hangzhou, 310006, Zhejiang, China.

Background: Coronavirus disease 2019 (COVID-19) emerged in China in December 2019. The COVID-19 pandemic hindered dental education, as school buildings were closed. Online dental teaching provided an alternative teaching tool for dental education. Read More

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Application of piggy-back lens in the correction of severe keratoconus: A case study.

Technol Health Care 2021 Apr 2. Epub 2021 Apr 2.

Objective: This is a case study on the application of a piggy-back lens in the correction of severe keratoconus.

Methods: From the results of general eye examination, refractive state examination, and corneal morphology examination on the patient, it was determined that corneal protrusion and deformation of the right eye were obvious. The right eye was corrected using a piggy-back lens and the left eye with a rigid gas-permeable contact lens (RGPCL) alone. Read More

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COMPARATIVE HYGIENIC ASSESSMENT OF WORKING CONDITIONS AND OCCUPATIONAL RISK IN THE APPLICATION OF PESTICIDES (ON THE EXAMPLE OF FUNGICIDE AMISTAR EXTRA 280, SC) USING DIFFERENT TYPES OF SPRAYERS.

Wiad Lek 2021 ;74(3 cz 2):726-730

BOGOMOLETS NATIONAL MEDICAL UNIVERSITY, KYIV, UKRAINE.

Objective: The aim: Was a comparative hygienic assessment of working conditions and occupational risk in the application of fungicide Amistar Extra 280, SC using slotted and injector sprayers.

Patients And Methods: Materials and methods: Sprayers Super Poly 110-04 (variant №1) and Guardian Air GA110-04 (variant № 2), and certified equipment were used. The occupational risk was assessed in accordance with the methodological recommendations proposed by the L. Read More

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January 2021

Consumer-Based Activity Trackers as a Tool for Physical Activity Monitoring in Epidemiological Studies During the COVID-19 Pandemic: Development and Usability Study.

JMIR Public Health Surveill 2021 Apr 3. Epub 2021 Apr 3.

Department of Community Medicine, UiT The Arctic University of Norway, Postboks 6050 langnes, Tromsø, NO.

Background: Consumer-based physical activity trackers increase in popularity. The widespread use of these devices and the long-term nature of the recorded data provides a valuable source of physical activity data for epidemiological research. Challenges include the large heterogeneity between activity tracker models, in terms of available data types, the accuracy of recorded data, and how this data can be shared between different providers and third-party systems. Read More

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Nature-Inspired Hierarchical Protrusion Structure Construction for Washable and Wear-Resistant Superhydrophobic Textiles with Self-Cleaning Ability.

ACS Appl Mater Interfaces 2021 Apr 12. Epub 2021 Apr 12.

Fraunhofer USA, Inc., Center Midwest, Division for Coatings and Diamond Technologies, Michigan State University, East Lansing, Michigan 48824, United States.

The use of toxic components and short longevity greatly restricted the commercial application of superhydrophobic surfaces in oil-water separation, antifouling, and self-cleaning. To address these concerns, a durable, robust, and fluorine-free superhydrophobic fabric is prepared on account of inspiration of nature. In this work, submicrometer-sized silica particles with different particle sizes are deposited onto cotton fabrics, followed by hydrophobic modification of poly(dimethylsiloxane) (PDMS), and consequently bonded the substrate and coating via powerful covalent bonds through a simple dip-coating technique. Read More

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Reconstructing tooth crown heights and enamel caps: A comparative test of three existing methods with recommendations for their use.

Anat Rec (Hoboken) 2021 Apr 11. Epub 2021 Apr 11.

Department of Anthropology, The Ohio State University, Columbus, OH, USA.

Studies of enamel growth and thickness, whether in paleoanthropology, bioarchaeology, or primatology, require measurements of crown height (CH), cuspal enamel thickness (CET), average (AET) and/or regional enamel thickness (RegAET) on complete, unworn crowns. Yet because fully unworn crowns are uncommon, three methods to bolster sample sizes by reconstructing slightly worn teeth have been developed: Profile, Polynomial, and Pen Tool. Although these methods have been tested for accuracy, no study has yet directly compared the three methods to assess their performance across CH, CET, AET, and RegAET measurements. Read More

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Prediction of personal protective equipment use in hospitals during COVID-19.

Health Care Manag Sci 2021 Apr 12. Epub 2021 Apr 12.

Department of Operations Management and Information Systems, Schulich School of Business, Toronto, ON, Canada.

Demand for Personal Protective Equipment (PPE) such as surgical masks, gloves, and gowns has increased significantly since the onset of the COVID-19 pandemic. In hospital settings, both medical staff and patients are required to wear PPE. As these facilities resume regular operations, staff will be required to wear PPE at all times while additional PPE will be mandated during medical procedures. Read More

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