2,834 results match your criteria wear rates

Effect of Anterior Cruciate Ligament Rupture on Physical Activity, Sports Participation, Patient-Reported Health Outcomes, and Physical Function in Young Female Athletes.

Am J Sports Med 2021 Apr 8:3635465211002530. Epub 2021 Apr 8.

Sport Injury Prevention Research Centre, Faculty of Kinesiology, University of Calgary, Calgary, Canada.

Background: Return to sports (RTS) is frequently considered an indicator of successful recovery after anterior cruciate ligament reconstruction (ACLR). However, despite the well-recognized health benefits of physical activity (PA), little is known about objectively measured PA in the 1 to 2 years after ACLR. Given that young female athletes have a high prevalence of ACLR and lower RTS rates as compared with their male counterparts, an in-depth examination of PA in this subgroup is warranted. Read More

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Comparison of identifiable and non-identifiable data linkage: health technology assessment of MitraClip using registry, administrative and mortality datasets.

BMJ Health Care Inform 2021 Apr;28(1)

Northern Medical Physics and Clinical Engineering, Newcastle Upon Tyne Hospitals NHS Trust, Newcastle Upon Tyne, Tyne and Wear, UK

Objectives: The UK MitraClip registry was commissioned by National Health Service (NHS) England to assess real-world outcomes from percutaneous mitral valve repair for mitral regurgitation using a new technology, MitraClip. This study aimed to determine longitudinal patient outcomes by linking to routine datasets: Hospital Episode Statistics (HES) Admitted Patient Care (APC) and Office of National Statistics.

Methods: Two methods of linkage were compared, using identifiable (NHS number, date of birth, postcode, gender) and non-identifiable data (hospital trust, age in years, admission, discharge and operation dates, operation and diagnosis codes). Read More

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Effect of surface treatment and glaze application on shade characterized resin-modified ceramic after toothbrushing.

J Prosthet Dent 2021 Apr;125(4):691.e1-691.e7

Professor, Department of Dental Materials Science, Academic Centre for Dentistry Amsterdam (ACTA), Universiteit van Amsterdam and Vrije Universiteit, Amsterdam, The Netherlands.

Statement Of Problem: The extrinsic characterization with pigments and glaze application on the surface of ceramic restorations promotes individualization and esthetics. However, whether this characterization is resistant to toothbrushing abrasive wear is unclear.

Purpose: The purpose of this in vitro study was to investigate the abrasive wear resistance of characterized and glazed resin-modified ceramic with different surface treatments before characterization. Read More

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The prevalence of mental illness and unmet needs of police custody detainees.

Crim Behav Ment Health 2021 Apr 5. Epub 2021 Apr 5.

Division of Psychological Medicine and Clinical Neurosciences, School of Medicine, Cardiff University, Cardiff, UK.

Background: Internationally, there is evidence of high rates of mental disorders amongst police custody detainees but this literature is limited, and there has been little research into the unmet needs of police detainees in the UK, or elsewhere. Such research could support better focussed interventions for improving health and recidivism outcomes.

Aim: To examine psychiatric and developmental morbidity amongst police detainees, and ascertain differences in need between morbidity categories. Read More

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On the Microstructural, Mechanical and Tribological Properties of Mo-Se-C Coatings and Their Potential for Friction Reduction against Rubber.

Materials (Basel) 2021 Mar 10;14(6). Epub 2021 Mar 10.

Department of Mechanical Engineering, CEMMPRE, University of Coimbra, Rua Luís Reis dos Santos, 3030-788 Coimbra, Portugal.

Friction and wear contribute to high energetic losses that reduce the efficiency of mechanical systems. However, carbon alloyed transition metal dichalcogenide (TMD-C) coatings possess low friction coefficients in diverse environments and can self-adapt to various sliding conditions. Hence, in this investigation, a semi-industrial magnetron sputtering device, operated in direct current mode (DC), is utilized to deposit several molybdenum-selenium-carbon (Mo-Se-C) coatings with a carbon content up to 60 atomic % (at. Read More

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Higher airborne pollen concentrations correlated with increased SARS-CoV-2 infection rates, as evidenced from 31 countries across the globe.

Proc Natl Acad Sci U S A 2021 03;118(12)

Chair of Environmental Medicine, Technical University of Munich, Augsburg 86156, Germany.

Pollen exposure weakens the immunity against certain seasonal respiratory viruses by diminishing the antiviral interferon response. Here we investigate whether the same applies to the pandemic severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), which is sensitive to antiviral interferons, if infection waves coincide with high airborne pollen concentrations. Our original hypothesis was that more airborne pollen would lead to increases in infection rates. Read More

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American Academy of Optometry Microbial Keratitis Think Tank.

Optom Vis Sci 2021 Mar;98(3):182-198

Department of Ophthalmology and Visual Sciences, Case Western Reserve University, and University Hospitals of Cleveland Eye Institute, Cleveland, Ohio Northeastern Eye Institute, Scranton, Pennsylvania C Schnider Insights & More, Brush Prairie, Washington Toronto Eye Care, Toronto, Ontario, Canada Bascom Palmer Eye Institute, University of Miami Miller School of Medicine, Miami, Florida School of Optometry and Vision Science, University of New South Wales, Sydney, New South Wales, Australia Clinical Trial Consultant, Atlanta, Georgia U.S. Centers for Disease Control and Prevention, Atlanta, Georgia Massachusetts Eye and Ear, Cornea Service, Harvard Medical School, Boston, Massachusetts Department of Ophthalmology and Visual Science, College of Medicine, Division of Epidemiology and Biostatistics, School of Public Health, University of Illinois at Chicago, Chicago, Illinois School of Optometry, University of California, Berkeley, Berkeley, California iBiomedical Consulting, Jacksonville, Florida University of Houston College of Optometry, Houston, Texas Departments of Ophthalmology, and Physiology and Biophysics, University of California, Irvine, Irvine, California Wilmer Eye Institute, Johns Hopkins University School of Medicine, Baltimore, Maryland University of Illinois Eye and Ear Infirmary, Chicago, Illinois

Significance: Think Tank 2019 affirmed that the rate of infection associated with contact lenses has not changed in several decades. Also, there is a trend toward more serious infections associated with Acanthamoeba and fungi. The growing use of contact lenses in children demands our attention with surveillance and case-control studies. Read More

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Diagnoses and Outcomes of Prosthetic Replacement of the Ocular Surface Ecosystem Treatment-A Canadian Experience.

Eye Contact Lens 2021 Mar 16. Epub 2021 Mar 16.

Faculty of Medicine (B.M.W. and A.G.), University of Toronto, Toronto, Canada; Department of Ophthalmology and Vision Sciences (T.T., M.M., M.C., C.C.C., and A.R.S.), University of Toronto, Toronto, Canada; Kensington Eye Institute (T.T., M.M., S.R., J.L., M.C., C.C.C., and A.R.S.), Toronto, Canada; and New England College of Optometry (J.L.), Boston, MA.

Objectives: To investigate underlying diagnoses and outcomes of patients undergoing Prosthetic Replacement of the Ocular Surface Ecosystem (PROSE) treatment at the first Canadian PROSE center.

Methods: A retrospective chart review was conducted on patients referred for PROSE treatment and fitted with PROSE devices from 2018 to 2020. Data were collected on diagnoses, presenting symptoms, previous lens modalities attempted, best-corrected visual acuities (BCVAs) pre-PROSE and post-PROSE, daily wear time, and failure rates. Read More

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Surgical treatments of atraumatic avascular necrosis of the shoulder.

Morphologie 2021 Mar 20. Epub 2021 Mar 20.

Service de chirurgie orthopédique et traumatologique, CHU de Rennes, hôpital Pontchaillou, 2, rue Henri-le-Guilloux, 35000 Rennes, France.

Humeral head atraumatic avascular necrosis is a rare diagnosis. It concerns young patients with a high functional demand. The treatments are mostly surgical. Read More

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Decision-making for the infant sleep environment among families with children considered to be at risk of sudden unexpected death in infancy: a systematic review and qualitative metasynthesis.

BMJ Paediatr Open 2021 5;5(1):e000983. Epub 2021 Mar 5.

Centre for Academic Child Health, University of Bristol Medical School, Bristol, UK.

Background: Advice to families to sleep infants on their backs, avoid smoke exposure, reduce excess bedcovering and avoid specific risks associated with cosleeping has greatly reduced sudden unexpected death in infancy (SUDI) rates worldwide. The fall in rates has not been equal across all groups, and this advice has been less effective for more socially deprived families. Understanding decision-making processes of families with infants at risk would support the development of more effective interventions. Read More

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The number of catalytic cycles in an enzyme's lifetime and why it matters to metabolic engineering.

Proc Natl Acad Sci U S A 2021 Mar;118(13)

Australian Research Council Centre of Excellence in Plant Energy Biology, School of Molecular Sciences, University of Western Australia, Crawley, WA 6009, Australia.

Metabolic engineering uses enzymes as parts to build biosystems for specified tasks. Although a part's working life and failure modes are key engineering performance indicators, this is not yet so in metabolic engineering because it is not known how long enzymes remain functional in vivo or whether cumulative deterioration (wear-out), sudden random failure, or other causes drive replacement. Consequently, enzymes cannot be engineered to extend life and cut the high energy costs of replacement. Read More

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Fretting-corrosion in hip taper modular junctions: The influence of topography and pH levels - An in-vitro study.

J Mech Behav Biomed Mater 2021 Mar 12;118:104443. Epub 2021 Mar 12.

Department of Orthopedic Surgery, Rush University Medical Center, Chicago, IL, USA; Department of Biomedical Science, UIC School of Medicine, Rockford, IL, USA. Electronic address:

Contemporary hip implants feature a modular design. Increased reported failure rates associated with the utilization of modular junctions have raised many clinical concerns. Typically, these modular interfaces contain circumferential machining marks (threads or microgrooves), but the effect of the machining marks on the fretting-corrosion behavior of total hip implant materials is unknown. Read More

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Retrospective clinical study of minimally invasive full-mouth rehabilitations of patients with erosions and/or abrasions following the "3-step technique". Part 1: 6-year survival rates and technical outcomes of the restorations.

Int J Prosthodont 2021 Mar 18. Epub 2021 Mar 18.

Purpose: To evaluate the survival rates and technical outcomes of minimally invasive full-mouth rehabilitations in patients affected by dental erosion and attrition.

Materials And Methods: For this retrospective study, 28 subjects (8 women, 20 men; mean age: 45.6 years) who suffered from generalized erosions and attrition and who were treated according to the 3-step technique were invited to participate. Read More

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Impaired regenerative capacity and senescence-associated secretory phenotype in mesenchymal stromal cells from samples of patients with aseptic joint arthroplasty loosening.

J Orthop Res 2021 Mar 22. Epub 2021 Mar 22.

Bernhard Heine Center for Locomotion Research, Department of Orthopedic, University of Würzburg, Würzburg, Germany.

Aseptic loosening of total hip and knee joint replacements is the most common indication for revision surgery after primary hip and knee arthroplasty. Research suggests that exposure and uptake of wear by mesenchymal stromal cells (MSC) and macrophages results in the secretion of proinflammatory cytokines and local osteolysis, but also impaired cell viability and regenerative capacity of MSC. Therefore, this in vitro study compared the regenerative and differentiation capacity of MSC derived from patients undergoing primary total hip arthroplasty (MSCprim) to MSC derived from patients undergoing revision surgery after aseptic loosening of total hip and knee joint implants (MSCrev). Read More

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Comparison of Ceramic-on-Ceramic and Ceramic-on-Highly-Crosslinked-Polyethylene in Primary Total Hip Arthroplasty: Findings of a Meta-Analysis.

Cureus 2021 Feb 12;13(2):e13304. Epub 2021 Feb 12.

Orthopaedic Surgery, King Saud University, Riyadh, SAU.

Introduction An optimal hip implant is biocompatible, durable, and resistant to chemical and mechanical wear. This analysis aimed to compare failure (revision) and complication rates between ceramic-on-ceramic (CoC) and ceramic-on-highly-crosslinked-polyethylene (CoHXLPE) implants. Methods This review comprised of scientific literature published between 1995 and 2019. Read More

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February 2021

Patients With Symptomatic Sequelae of Slipped Capital Femoral Epiphysis Have Advanced Cartilage Wear at the Time of Surgical Intervention.

J Pediatr Orthop 2021 Mar 17. Epub 2021 Mar 17.

Department of Orthopaedics, Washington University in St Louis, St Louis, MO.

Background: Slipped capital femoral epiphysis (SCFE) is a common hip problem in children. The resulting deformity can cause impingement similar to cam-type idiopathic femoroacetabular impingement (FAI). Although there are similarities between FAI and SCFE, deformity patterns, severity, and time of onset of symptoms varies, which may impact management. Read More

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COVID-19 infection among healthcare workers: a cross-sectional study in southwest Iran.

Virol J 2021 03 17;18(1):58. Epub 2021 Mar 17.

Anesthesiology and Critical Care Research Center, Shiraz University of Medical Sciences, Shiraz, Iran.

Objective: With the novel coronavirus pandemic, the impact on the healthcare system and workers cannot be overlooked. However, studies on the infection status of medical personnel are still lacking. It is imperative to ensure the safety of health-care workers (HCWs) not only to safeguard continuous patient care but also to ensure they do not transmit the virus, therefore evaluation of infection rates in these groups are indicated. Read More

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Wear patterns and dental functioning in an Early Cretaceous stegosaur from Yakutia, Eastern Russia.

PLoS One 2021 17;16(3):e0248163. Epub 2021 Mar 17.

Vertebrate Zoology Department, Saint Petersburg State University, Universitetskaya Emb. 7/9, St. Petersburg, Russia.

Isolated stegosaurian teeth from the Early Cretaceous high-latitude (palaeolatitude estimate of N 62°- 66.5°) Teete locality in Yakutia (Eastern Siberia, Russia) are characterized by a labiolingually compressed, slightly asymmetrical and mesiodistally denticulated (9-14 denticles) crown, a pronounced ring-like cingulum, as well as a "complex network of secondary ridges". The 63 teeth (found during on-site excavation in 2012, 2017-2019 and screen-washing in 2017-2019) most likely belong to one species of a derived (stegosaurine) stegosaur. Read More

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In vitro skin model for characterization of sunscreen substantivity upon perspiration.

Int J Cosmet Sci 2021 Mar 17. Epub 2021 Mar 17.

Department of Chemistry, Technical University of Denmark, 2800, Kgs. Lyngby, Denmark.

Objective: The resistance of sunscreens to the loss of ultraviolet (UV) protection upon perspiration is important for their practical efficacy. However, this topic is largely overlooked in evaluations of sunscreen substantivity due to the relatively few well-established protocols compared to those for water resistance and mechanical wear.

Methods: In an attempt to achieve a better fundamental understanding of sunscreen behavior in response to sweat exposure, we have developed a perspiring skin simulator, containing a substrate surface that mimics sweating human skin. Read More

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Enhanced detection of cardiac arrhythmias utilizing 14-day continuous ECG patch monitoring.

Int J Cardiol 2021 Mar 13. Epub 2021 Mar 13.

Heart Rhythm Center, Division of Cardiology, Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan; Institute of Clinical Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan; Cardiovascular Center, Taichung Veterans General Hospital, Taichung, Taiwan.

Background: To evaluate the performance of a single‑lead, 14-day continuous electrocardiogram (ECG) patch for the detection of arrhythmias compared to conventional 24-h monitoring.

Methods: This prospective clinical trial enrolled patients suspected of arrhythmias but not diagnosed by 12‑lead ECGs. Each patient underwent a 24-h Holter and 14-day ECG patch simultaneously. Read More

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Radiation exposure to the urology surgeon during retrograde intrarenal surgery.

PLoS One 2021 15;16(3):e0247833. Epub 2021 Mar 15.

Department of Urology, Gil Medical Center, Gachon University College of Medicine, Incheon, Republic of Korea.

Retrograde intrarenal surgery is a common procedure that carries a risk of radiation exposure for urologists. This study aimed to measure the amount of radiation that urologists are exposed to during surgery, and to estimate how many procedures can be safely performed by one urologist per year. Variables that affect radiation exposure were also identified. Read More

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COVID-19 and human reproduction: A pandemic that packs a serious punch.

Syst Biol Reprod Med 2021 Feb;67(1):3-23

Department of Obstetrics and Gynecology, Wayne State University School of Medicine, Detroit, Michigan, USA.

The COVID-19 pandemic has led to a worldwide health emergency that has impacted 188 countries at last count. The rapid community transmission and relatively high mortality rates with COVID-19 in modern times are relatively unique features of this flu pandemic and have resulted in an unparalleled global health crisis. SARS-CoV-2, being a respiratory virus, mainly affects the lungs, but is capable of infecting other vital organs, such as brain, heart and kidney. Read More

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February 2021

Wearable Technology May Assist in Retraining Foot Strike Patterns in Previously Injured Military Service Members: A Prospective Case Series.

Front Sports Act Living 2021 26;3:630937. Epub 2021 Feb 26.

Department of Civil and Mechanical Engineering, United States Military Academy, West Point, NY, United States.

A rearfoot strike (RFS) pattern with increased average vertical loading rates (AVLR) while running has been associated with injury. This study evaluated the ability of an instrumented sock, which provides real-time foot strike and cadence audio biofeedback, to transition previously injured military service members from a RFS to a non-rearfoot strike (NRFS) running pattern. Nineteen RFS runners (10 males, 9 females) were instructed to wear the instrumented socks to facilitate a change in foot strike while completing an independent walk-to-run progression and lower extremity exercise program. Read More

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February 2021

Antimicrobial efficacy and durability of copper formulations over one year of hospital use.

Infect Control Hosp Epidemiol 2021 Mar 15:1-9. Epub 2021 Mar 15.

Infection Prevention and Control, North York General Hospital, Toronto, Ontario, Canada.

Objective: To evaluate 3 formulations of copper (Cu)-based self-sanitizing surfaces for antimicrobial efficacy and durability over 1 year in inpatient clinical areas and laboratories.

Design: Randomized control trial.

Setting: We assessed 3 copper formulations: (1) solid alloy 80% Cu-20% Ni (integral copper), (2) spray-on 80% Cu-20% Ni (spray-on) and (3) 16% composite copper-impregnated surface (CIS). Read More

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Effectiveness of transdiagnostic seminars to support patients with common mental disorders: a multi-service practice research network study.

Behav Cogn Psychother 2021 Mar 12:1-13. Epub 2021 Mar 12.

Clinical Psychology Unit, University of Sheffield, Sheffield, UK.

Background: This was a multi-site evaluation of psycho-educational transdiagnostic seminars (TDS) as a pre-treatment intervention to enhance the effectiveness and utilisation of high-intensity cognitive behavioural therapy (CBT).

Aims: To evaluate the effectiveness of TDS combined with high-intensity CBT (TDS+CBT) versus a matched sample receiving CBT only. Second, to determine the consistency of results across participating services which employed CBT+TDS. Read More

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Tear film stability over a myopia control contact lens compared to a monofocal design.

Clin Exp Optom 2021 Mar 2:1-7. Epub 2021 Mar 2.

Clinical and Experimental Optometry Research Laboratory (CEORLab) Center of Physics (Optometry), University of Minho, Braga, Portugal.

: Tear film assessment is essential in contact lens wearers and it can improve the success rates of the fitting.: To compare the short-term effect of two contact lenses on pre-lens tear film stability and comfort: dual-focus contact lens (MiSight) and a monofocal contact lens (Proclear 1-day).: This randomised, double-masked, crossover study was performed in twenty-eight healthy, myopic volunteers aged between 18 and 32 years (23. Read More

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