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https://www.readbyqxmd.com/read/28823063/glass-ceramic-cad-cam-crowns-and-severely-altered-posterior-teeth-a-three-levels-study
#1
Michel Fages, Stephane Corn, Pierre Slangen, Jacques Raynal, Patrick Ienny, Kinga Turzo, Frederic Cuisinier, Jean-Cédric Durand
For many practitioners, longevity of full glass ceramic crowns in the posterior area, molars and premolars, remains a real challenge. The purpose of this article is to identify and evaluate the parameters that can significantly influence their resistance when preparing a tooth. The analysis proposed in this article relies on interrelated studies conducted at three levels: in vitro (mechanical tests), in silico (finite elements simulations) and in vivo (clinical survival rates). The in vitro and the in silico studies proved that an appropriate variation of the geometric design of the preparations enables to increase up to 80% the mechanical strength of ceramic reconstructions...
August 19, 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/28822819/-reflection-before-practice-improves-self-assessment-and-end-performance-in-laparoscopic-surgical-skills-training
#2
Sandeep Ganni, Sanne M B I Botden, Dennis P Schaap, Bas H Verhoeven, Richard H M Goossens, Jack J Jakimowicz
OBJECTIVE: To establish whether a systematized approach to self-assessment in a laparoscopic surgical skills course improves accordance between expert- and self-assessment. DESIGN: A systematic training course in self-assessment using Competency Assessment Tool was introduced into the normal course of evaluation within a Laparoscopic Surgical Skills training course for the test group (n = 30). Differences between these and a control group (n = 30) who did not receive the additional training were assessed...
August 16, 2017: Journal of Surgical Education
https://www.readbyqxmd.com/read/28822657/a-systematic-review-of-muscle-morphology-and-function-in-intermittent-claudication
#3
REVIEW
Amy E Harwood, Stephanie King, Joshua Totty, George E Smith, Natalie Vanicek, Ian C Chetter
OBJECTIVE: Intermittent claudication (IC) is frequently associated with deterioration in walking capacity and physical function, and it can often result in an impairment in balance. Whereas supervised exercise is recommended by the National Institute for Health and Care Excellence as the first-line treatment, the mechanism behind walking improvement is poorly understood. The existing literature suggests that there may be some physiologic change to the skeletal muscle contributing to the functional impairment, but these data are conflicting...
August 16, 2017: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/28822581/favorable-residual-stress-induction-by-resin-cementation-on-dental-porcelain
#4
Garry J P Fleming, Xu Cao, Dan L Romanyk, Owen Addison
OBJECTIVES: Despite developments in polycrystalline ceramics, glassy dental-ceramic materials provide the optimum cosmetic option in most clinical situations to mimic the natural dentition. The clinical success of glassy dental-ceramic materials is often attributed to resin-adhesive bonding techniques. In this study we explore whether shrinkage stresses generated on photo-polymerisation of the resin-cement are sufficient to induce ceramic surface defect stabilization, and we quantify the transient nature of the induced stresses...
August 16, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28822017/validation-of-a-non-contact-screening-device-for-the-combination-of-sleep-disordered-breathing-and-periodic-limb-movements-in-sleep
#5
Gerhard Weinreich, Sarah Terjung, Yi Wang, Stefanie Werther, Alberto Zaffaroni, Helmut Teschler
PURPOSE: Recent studies found that the non-contact screening device SleepMinder (ResMed Sensor Technologies, Dublin, Ireland) detects sleep-disordered breathing (SDB) with high diagnostic accuracy in cohorts suspected of this disorder. However, it was reported that in patients with periodic limb movement in sleep (PLMS), this non-contact device overestimates the apnea-hypopnea index (AHI). We aimed to overcome this limitation by introducing the novel sleep disorder index (SDI) which is sum of the AHI and the period limb movement index (PLMI)...
August 18, 2017: Sleep & Breathing, Schlaf & Atmung
https://www.readbyqxmd.com/read/28822015/experimental-periodontitis-in-the-potentialization-of-the-effects-of-immobilism-in-the-skeletal-striated-muscle
#6
Marcela Aparecida Leite, Tatiane Morgenstern de Mattia, Camila Mayumi Martin Kakihata, Bruna Martinazzo Bortolini, Pedro Henrique de Carli Rodrigues, Gladson Ricardo Flor Bertolini, Rose Meire Costa Brancalhão, Lucinéia de Fátima Chasko Ribeiro, Carlos Augusto Nassar, Patrícia Oehlmeyer Nassar
This study aims to evaluate if ligature-induced periodontitis can potentiates the deleterious effects of immobilization in the skeletal striated muscle, contributing to the development of muscle atrophy due to disuse. Forty Wistar rats were divided into four groups: (1) Control Group (CG), (2) Periodontal Disease (PDG), (3) Immobilized (IG), and (4) Immobilized with Periodontal Disease (IPDG). Periodontal disease was induced for 30 days, with ligature method, and the immobilization was performed with cast bandage for 15 days...
August 18, 2017: Inflammation
https://www.readbyqxmd.com/read/28821650/feedback-signal-from-motoneurons-influences-a-rhythmic-pattern-generator
#7
Horacio G Rotstein, Elisa Schneider, Lidia Szczupak
Motoneurons are not mere output units of neuronal circuits that control motor behavior, but participate in pattern generation. Research on the circuit that controls the crawling motor behavior in leeches indicated that motoneurons participate as modulators of this rhythmic motor pattern. Crawling results from successive bouts of elongation and contraction of the whole leech body. In the isolated segmental ganglia dopamine can induce a rhythmic antiphasic activity of the motoneurons that control contraction (DE-3 motoneurons) and elongation (CV motoneurons)...
August 16, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28821554/developing-standards-for-the-development-of-glaucoma-virtual-clinics-using-a-modified-delphi-approach
#8
Aachal Kotecha, Simon Longstaff, Augusto Azuara-Blanco, James F Kirwan, James Edwards Morgan, Anne Fiona Spencer, Paul J Foster
PURPOSE: To obtain consensus opinion for the development of a standards framework for the development and implementation of virtual clinics for glaucoma monitoring in the UK using a modified Delphi methodology. METHODS: A modified Delphi technique was used that involved sampling members of the UK Glaucoma and Eire Society (UKEGS). The first round scored the strength of agreement to a series of standards statements using a 9-point Likert scale. The revised standards were subjected to a second round of scoring and free-text comment...
August 18, 2017: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/28821427/effects-of-different-strength-training-frequencies-on-maximum-strength-body-composition-and-functional-capacity-in-healthy-older-individuals
#9
Mari Turpela, Keijo Häkkinen, Guy Gregory Haff, Simon Walker
There is controversy in the literature regarding the dose-response relationship of strength training in healthy older participants. The present study determined training frequency effects on maximum strength, muscle mass and functional capacity over 6months following an initial 3-month preparatory strength training period. One-hundred and six 64-75year old volunteers were randomly assigned to one of four groups; performing strength training one (EX1), two (EX2), or three (EX3) times per week and a non-training control (CON) group...
August 15, 2017: Experimental Gerontology
https://www.readbyqxmd.com/read/28821059/characterization-of-alkali-treated-and-untreated-new-cellulosic-fiber-from-saharan-aloe-vera-cactus-leaves
#10
Balaji A N, Nagarajan K J
The aim of this study is to examine the use of new natural fibers, which are extracted from the Saharan aloe vera cactus plant leaves as reinforcement in polymer composites. The physicochemical, mechanical and thermal properties of the Saharan Aloe Vera Cactus Leaves (SACL) fibers are investigated, through the effect of alkali treatment. The contents of α-cellulose, hemicellulose, wax and moisture present in SACL fibers were characterized by standard test methods The mechanical properties of SACL fibers were measured through single fiber tensile test...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28820905/estimating-the-evidential-value-of-significant-results-in-psychological-science
#11
Balazs Aczel, Bence Palfi, Barnabas Szaszi
Quantifying evidence is an inherent aim of empirical science, yet the customary statistical methods in psychology do not communicate the degree to which the collected data serve as evidence for the tested hypothesis. In order to estimate the distribution of the strength of evidence that individual significant results offer in psychology, we calculated Bayes factors (BF) for 287,424 findings of 35,515 articles published in 293 psychological journals between 1985 and 2016. Overall, 55% of all analyzed results were found to provide BF > 10 (often labeled as strong evidence) for the alternative hypothesis, while more than half of the remaining results do not pass the level of BF = 3 (labeled as anecdotal evidence)...
2017: PloS One
https://www.readbyqxmd.com/read/28820857/kinematic-and-neuromuscular-measures-of-intensity-during-plyometric-jumps
#12
David Cristóbal Andrade, Oscar Manzo, Ana Rosa Beltrán, Cristian Álvarez, Rodrigo Del Rio, Camilo Toledo, Jason Moran, Rodrigo Ramirez-Campillo
The aim of this study was to assess jumping performance and neuromuscular activity in lower limb muscles after drop jumps (DJ) from different drop heights (intensity) and during continuous jumping (fatigue), using markers such as reactive strength, jump height, mechanical power and surface electromyography (sEMG). The eccentric (EC) and concentric (CON) sEMG from the medial gastrocnemius (MG), biceps femoris (BF) and rectus (R) muscles were assessed during all tests. In a cross-sectional, randomized study, eleven volleyball players (age 24...
August 15, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28820854/a-brief-review-of-handgrip-strength-and-sport-performance
#13
John Cronin, Trent Lawton, Nigel Harris, Andrew Kilding, Daniel Travis McMaster
Tests of handgrip strength (HGS) and handgrip force (HGF) are commonly used across a number of sporting populations. Measures of HGS and HGF have also been utilized by practitioners and researchers to evaluate links with sports performance. This article, firstly evaluates the validity and reliability of various handgrip dynamometers (HGD) and HGF sensors, providing recommendations for procedures to ensure precise and reliable data are collected as part of an athlete testing battery. Secondly, the differences in HGS between elite and sub-elite athletes and the relationships between HGS, HGF, and sports performance are discussed...
August 15, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28820847/effectiveness-of-a-16-week-high-intensity-cardioresistance-training-program-in-adults
#14
Tina A Greenlee, Daniel R Greene, Nathan J Ward, Ginger E Reeser, Courtney M Allen, Nicholas W Baumgartner, Neal J Cohen, Arthur F Kramer, Charles H Hillman, Aron K Barbey
Greenlee, TA, Greene, DR, Ward, NJ, Reeser, GE, Allen, CM, Baumgartner, NW, Cohen, NJ, Kramer, AF, Hillman, CH, and Barbey, AK. Effectiveness of a 16-week high-intensity cardioresistance training program in adults. J Strength Cond Res 31(9): 2528-2541, 2017-The purpose of this study was to determine the efficacy of a novel, 16-week high-intensity cardioresistance training (HICRT) program on measures of aerobic fitness, agility, aerobic power, muscular endurance, lower-body explosive power, and self-reported activity level...
September 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28820846/noninvasive-assessment-of-skeletal-muscle-myosin-heavy-chain-expression-in-trained-and-untrained-men
#15
Andrew C Fry, Terry J Housh, Joel B Cramer, Joseph P Weir, Travis W Beck, Brian K Schilling, Jonathan D Miller, Justin X Nicoll
Fry, AC, Housh, TJ, Cramer, JB, Weir, JP, Beck, TW, Schilling, BK, Miller, JD, and Nicoll, JX. Noninvasive assessment of skeletal muscle myosin heavy chain expression in trained and untrained men. J Strength Cond Res 31(9): 2355-2362, 2017-Numerous conditions and types of physical activity (e.g., exercise, aging, and muscle-related diseases) can influence muscle fiber types and the proteins expressed. To date, muscle fibers can only be characterized by actually obtaining a tissue sample using the invasive muscle biopsy procedure...
September 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28820524/patterns-of-hand-grip-strength-and-detection-of-strength-loss-in-patients-undergoing-bone-marrow-transplantation-a-feasibility-study
#16
Cindy A Sayre, Basia Belza, Kathleen Shannon Dorcy, Elizabeth Phelan, JoAnne D Whitney
PURPOSE/OBJECTIVES: To determine the feasibility of measuring hand grip strength (HGS) daily in a population of recipients of bone marrow transplantation (BMT), to describe changes in strength measured by HGS, and to describe relationships between laboratory values (hematocrit, hemoglobin, and absolute neutrophil count) and HGS.
. DESIGN: Prospective, longitudinal, repeated measures, within subject.
. SETTING: Inpatient units at the University of Washington Medical Center in Seattle...
September 1, 2017: Oncology Nursing Forum
https://www.readbyqxmd.com/read/28820444/a-novel-partial-discharge-localization-method-in-substation-based-on-a-wireless-uhf-sensor-array
#17
Zhen Li, Lingen Luo, Nan Zhou, Gehao Sheng, Xiuchen Jiang
Effective Partial Discharge (PD) localization can detect the insulation problems of the power equipment in a substation and improve the reliability of power systems. Typical Ultra-High Frequency (UHF) PD localization methods are mainly based on time difference information, which need a high sampling rate system. This paper proposes a novel PD localization method based on a received signal strength indicator (RSSI) fingerprint to quickly locate the power equipment with potential insulation defects. The proposed method consists of two stages...
August 18, 2017: Sensors
https://www.readbyqxmd.com/read/28819809/effect-of-synthetic-and-natural-derived-novel-endodontic-irrigant-solutions-on-mechanical-properties-of-human-dentin
#18
Doglas Cecchin, Vitória Soares Giaretta, Bérove Granella Cadorin, Matheus Albino Souza, Cristina de Mattos Pimenta Vidal, Ana Paula Farina
This study aimed to evaluate the effects of different synthetic and natural-derived root canal irrigants (6% sodium hypochlorite [NaOCl], 6% calcium hypochlorite [Ca(OCl)2] and 6.5% grape seed extract [GSE]) on dentin mechanical properties (flexural strength, ultimate tensile strength [UTS] and fracture resistance). Rectangular-shaped beams and hourglass-shaped sections obtained from mid-coronal and root dentin were treated with 6% NaOCl, 6% Ca(OCl)2 or 6.5% GSE for 30 min. The irrigant solutions were replaced every 5 min...
August 17, 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/28819658/weld-formation-during-material-extrusion-additive-manufacturing
#19
Jonathan E Seppala, Seung Hoon Han, Kaitlyn E Hillgartner, Chelsea S Davis, Kalman B Migler
Material extrusion (ME) is a layer-by-layer additive manufacturing process that is now used in personal and commercial production where prototyping and customization are required. However, parts produced from ME frequently exhibit poor mechanical performance relative to those from traditional means; moreover, fundamental knowledge of the factors leading to development of inter-layer strength in this highly non-isothermal process is limited. In this work, we seek to understand the development of inter-layer weld strength from the perspective of polymer interdiffusion under conditions of rapidly changing mobility...
August 18, 2017: Soft Matter
https://www.readbyqxmd.com/read/28819359/screening-for-cushing-syndrome-at-the-primary-care-level-what-every-general-practitioner-must-know
#20
REVIEW
Ernest Yorke, Yacoba Atiase, Josephine Akpalu, Osei Sarfo-Kantanka
Cushing's syndrome is a rare entity, and a high index of suspicion is needed for screening in a primary care setting. The clinical awareness of the primary care physician (PCP) to the highly indicative signs and symptoms such as facial plethora, proximal myopathy, reddish purple striae, and easy bruisability should alert him to look for biochemical evidence of Cushing's syndrome through any of the first-line screening tests, namely, 24-hour urinary free cortisol, overnight dexamethasone suppression test, or late-night salivary cortisol...
2017: International Journal of Endocrinology
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