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https://www.readbyqxmd.com/read/29142641/accuracy-of-several-implant-bite-registration-techniques-an-in-vitro-pilot-study
#1
Do-Hyun Park, Ji-Man Park, Jae-Won Choi, Eun-Sook Kang, Eun-Bin Bae, Young-Chan Jeon, Chang-Mo Jeong, Mi-Jung Yun, Jung-Bo Huh
PURPOSE: This study evaluated the accuracies of different bite registration techniques for implant-fixed prostheses using three dimensional file analysis. MATERIALS AND METHODS: Implant fixtures were placed on the mandibular right second premolar, and the first and second molar in a polyurethane model. Aluwax (A), Pattern Resin (P), and Blu-Mousse (B) were used as the bite registration materials on the healing abutments (H) or temporary abutments (T). The groups were classified into HA, HP, HB, TA, TP, and TB according to each combination...
October 2017: Journal of Advanced Prosthodontics
https://www.readbyqxmd.com/read/29129064/impacts-of-combined-cooling-heating-and-power-systems-and-rainwater-harvesting-on-water-demand-carbon-dioxide-and-nox-emissions-for-atlanta
#2
Jean-Ann James, Sangwoo Sung, Hyunju Jeong, Osvaldo Alejandro Broesicke, Steve French, Duo Li, John C Crittenden
The purpose of this study is to explore the potential water, CO2 and NOx emission, and cost savings that the deployment of decentralized water and energy technologies within two urban growth scenarios can achieve. We assess the effectiveness of urban growth, technological, and political strategies to reduce these burdens in the 13-county Atlanta metropolitan region. The urban growth between 2005 and 2030 was modeled for a business as usual (BAU) scenario and a more compact growth (MCG) scenario. We considered combined cooling, heating and power (CCHP) systems using microturbines for our decentralized energy technology and rooftop rainwater harvesting and low flow fixtures for the decentralized water technologies...
November 11, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/29120888/removal-of-oral-biofilm-on-an-implant-fixture-by-a-cavitating-jet
#3
Junki Yamada, Takashi Takiguchi, Akihiro Saito, Hibiki Odanaka, Hitoshi Soyama, Matsuo Yamamoto
PURPOSE: To demonstrate the effectiveness of the cavitating jet in removing biofilms from the rough surface of 3-dimensional structures. MATERIALS AND METHODS: The optimal nozzle dimensions and injection conditions were identified by cavitation impact measurements. Biofilm was grown intraorally for 72 hours by 4 volunteers. The stained fixtures were assigned to different experimental groups. One comparison was performed between the cavitating jet and the water jet at 60 seconds...
November 8, 2017: Implant Dentistry
https://www.readbyqxmd.com/read/29118716/etiology-and-recovery-of-neuromuscular-fatigue-following-competitive-soccer-match-play
#4
Callum G Brownstein, Jack P Dent, Paul Parker, Kirsty M Hicks, Glyn Howatson, Stuart Goodall, Kevin Thomas
Aim: Previous research into the etiology of neuromuscular fatigue following competitive soccer match-play has primarily focused on peripheral perturbations, with limited research assessing central nervous system function in the days post-match. The aim of the present study was to examine the contribution and time-course of recovery of central and peripheral factors toward neuromuscular fatigue following competitive soccer match-play. Methods: Sixteen male semi-professional soccer players completed a 90-min soccer match...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/29109339/effects-of-surface-microtopography-of-titanium-disks-on-cell-proliferation-and-differentiation-of-osteoblast-like-cells-isolated-from-rat-calvariae
#5
Satoshi Yokose, Perry R Klokkevold, Henry H Takei, Hiroshi Kadokura, Tetsuya Kikui, Yasushi Hibino, Hirotaka Shigeta, Hiroshi Nakajima, Hiroshi Kawazu
The surface topography of implant fixture is an important factor affecting the osseointegration. We herein demonstrated the effects of surface microtopography of titanium disks on proliferation and differentiation of osteoblast-like cells isolated from rat calvariae. Titanium disks with machine surface (MS), rough surface (R1) and rough surface combined with small cavities (R2) were used in an in vitro culture system. Rough surfaces (R1 and R2 disks) induced stronger osteoblast proliferation and differentiation (BGP and sclerostin mRNA expressions and calcium content) than the smooth surface (MS disk)...
November 3, 2017: Dental Materials Journal
https://www.readbyqxmd.com/read/29103352/cyberbullying-and-social-media-information-and-interventions-for-school-nurses-working-with-victims-students-and-families
#6
Elizabeth Byrne, Judith A Vessey, Lauren Pfeifer
Social media has become an increasingly prevalent fixture in youths' lives, with over 90% of teenagers reporting daily usage. These online sites and applications have provided many positive opportunities for youths to connect and share ideas with others; however, social media has also become a major platform for cyberbullying. Victims often experience negative health outcomes directly related to cyberbullying. For this reason, it is critical that third parties, such as school nurses, are well versed in social media and the warning signs of those being victimized by cyberbullying...
January 1, 2017: Journal of School Nursing: the Official Publication of the National Association of School Nurses
https://www.readbyqxmd.com/read/29100777/anisometry-of-medial-patellofemoral-ligament-reconstruction-in-the-setting-of-increased-tibial-tubercle-trochlear-groove-distance-and-patella-alta
#7
Lauren H Redler, Kathleen N Meyers, Jacqueline M Brady, Elizabeth R Dennis, Joseph T Nguyen, Beth E Shubin Stein
PURPOSE: To assess the impact elevated tibial tubercle-trochlear groove (TT-TG) distance and patella height, as measured by the Caton-Deschamps Index (CDI), have on the isometry of a reconstructed medial patellofemoral ligament (MPFL). METHODS: Nine fresh-frozen cadaveric knees were placed on a custom testing fixture, with a fixed femur and a mobile tibia. A suture fixed to the MPFL origin on the patella and free to move at the Schöttle point on the femur represented a reconstructed MPFL...
October 31, 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/29096123/in-vitro-validation-of-a-novel-mechanical-model-for-testing-the-anchorage-capacity-of-pedicle-screws-using-physiological-load-application
#8
Christian Liebsch, Julia Zimmermann, Nicolas Graf, Christoph Schilling, Hans-Joachim Wilke, Annette Kienle
Biomechanical in vitro tests analysing screw loosening often include high standard deviations caused by high variabilities in bone mineral density and pedicle geometry, whereas standardized mechanical models made of PU foam often do not integrate anatomical or physiological boundary conditions. The purpose of this study was to develop a most realistic mechanical model for the standardized and reproducible testing of pedicle screws regarding the resistance against screw loosening and the holding force as well as to validate this model by in vitro experiments...
October 25, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/29090970/ten-year-cbct-observation-of-the-buccal-bony-wall-of-an-immediately-placed-implant-at-the-anterior-maxilla-a-case-report
#9
Junho Jung, Kwantae Noh, Bilal Al-Nawas, Yong-Dae Kwon
Since the introduction of immediate implant placement, the buccal bony wall has been a major consideration for success, due to its correlation with soft tissue contour and color. This report presents the stability of the buccal wall thickness of an immediately placed implant at the anterior maxilla along 10-years. Although the width of the buccal wall had a decrease at post-op 2 years' follow-up, it remained stable afterwards, according to cone beam computed tomography (CBCT) scans. Hence, this report suggests that ensuring adequate bony wall thickness with bone augmentation and fixture position may promise the longevity of the buccal bony wall and surrounding soft tissue in immediate implant placement...
November 1, 2017: Journal of Oral Implantology
https://www.readbyqxmd.com/read/29076809/compact-3d-printed-module-for-fluorescent-and-label-free-imaging-using-evanescent-excitation
#10
Vikas Pandey, Shalini Gupta, Ravikrishnan Elangovan
Total internal reflection fluorescence (TIRF) microscopy is widely used for selective excitation and high-resolution imaging of fluorophores, and more recently label-free nanosized objects, with high vertical confinement near a liquid/solid interface. Traditionally, high numerical aperture (NA) objectives (> 1.4) are used to simultaneously generate evanescent waves and collect fluorescence emission signals which limits their use to small area imaging (< 0.1 mm2). Objective-based TIRFs are also expensive as they require dichroic mirrors and efficient notch filters to prevent specular reflection within the objective lenses...
October 27, 2017: Methods and Applications in Fluorescence
https://www.readbyqxmd.com/read/29068799/comparative-study-on-early-osseointegration-of-implants-according-to-various-drilling-speeds-in-the-mandible-of-dogs
#11
Dong-Uk Seo, Su-Gwan Kim, Ji-Su Oh, Sung-Chul Lim
PURPOSE: This study evaluated the effect of drilling speed on early bone healing in the mandible of dogs. MATERIAL AND METHODS: Six dogs were selected, and mandibular premolars and molars were extracted. After 2 months, 3 hydroxyapatite-surfaced fixtures were implanted with drilling speeds of 50, 800, and 1200 rpm on the right side first and then on the left side after 2 weeks. Implant stability quotient (ISQ) was measured on insertion, after 2 and 4 weeks. RESULTS: Based on the ISQ measurement, the 1200-rpm group showed a higher value than the 50-rpm group at 2 weeks and 4 weeks (P < 0...
October 24, 2017: Implant Dentistry
https://www.readbyqxmd.com/read/29065610/hollow-abutment-screw-design-for-easy-retrieval-in-case-of-screw-fracture-in-dental-implant-system
#12
Bo Kyun Sim, Bongju Kim, Min Jeong Kim, Guk Hyun Jeong, Kyung Won Ju, Yoo Jin Shin, Man Yong Kim, Jong-Ho Lee
The prosthetic component of dental implant is attached on the abutment which is connected to the fixture with an abutment screw. The abutment screw fracture is not frequent; however, the retrieval of the fractured screw is not easy, and it poses complications. A retrieval kit was developed which utilizes screw removal drills to make a hole on the fractured screw that provides an engaging drill to unscrew it. To minimize this process, the abutment screw is modified with a prefabricated access hole for easy retrieval...
2017: Journal of Healthcare Engineering
https://www.readbyqxmd.com/read/29060278/a-study-on-setting-of-the-fatigue-limit-of-temporary-dental-implants
#13
M H Kim, E J Cho, J W Lee, E K Kim, S H Yoo, C W Park
A temporary dental implant is a medical device which is temporarily used to support a prosthesis such as an artificial tooth used for restoring patient's masticatory function during implant treatment. It is implanted in the oral cavity to substitute for the role of tooth. Due to the aging and westernization of current Korean society, the number of tooth extraction and implantation procedures is increasing, leading to an increase in the use and development of temporary dental implants. Because an implant performs a masticatory function in place of a tooth, a dynamic load is repeatedly put on the implant...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29059039/ambulance-disinfection-using-ultraviolet-germicidal-irradiation-uvgi-effects-of-fixture-location-and-surface-reflectivity
#14
William G Lindsley, Tia L McClelland, Dylan T Neu, Stephen B Martin, Kenneth R Mead, Robert E Thewlis, John D Noti
Ambulances are frequently contaminated with infectious microorganisms shed by patients during transport that can be transferred to subsequent patients and emergency medical service workers. Manual decontamination is tedious and time-consuming, and persistent contamination is common even after cleaning. Ultraviolet germicidal irradiation (UVGI) has been proposed as a terminal disinfection method for ambulance patient compartments. However, no published studies have tested the use of UVGI in ambulances. The objectives of this study were to investigate the efficacy of a UVGI system in an ambulance patient compartment and to examine the impact of UVGI fixture position and the UV reflectivity of interior surfaces on the time required for disinfection...
October 23, 2017: Journal of Occupational and Environmental Hygiene
https://www.readbyqxmd.com/read/29053688/a-millimeter-scale-flexural-testing-system-for-measuring-the-mechanical-properties-of-marine-sponge-spicules
#15
Michael A Monn, Jarod Ferreira, Jianzhe Yang, Haneesh Kesari
Many load bearing biological structures (LBBSs)-such as feather rachises and spicules-are small (<1 mm) but not microscopic. Measuring the flexural behavior of these LBBSs is important for understanding the origins of their remarkable mechanical functions. We describe a protocol for performing three-point bending tests using a custom-built mechanical testing device that can measure forces ranging from 10(-5) to 10(1) N and displacements ranging from 10(-7) to 10(-2) m. The primary advantage of this mechanical testing device is that the force and displacement capacities can be easily adjusted for different LBBSs...
October 11, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29044369/law-as-a-fixture-between-the-one-health-interfaces-of-emerging-diseases
#16
Alexandra L Phelan, Lawrence O Gostin
A One Health approach calls for multisectoral and multi-institutional cooperation and partnership across the interfaces of human, animal and ecosystem health risks. Without strong governance, these interfaces risk detaching, leaving gaps in capacities to prevent, detect and respond to emerging and persisting public health threats. As a crucial component of governance, law can act as the fixture between interfaces. We examine some of the many forms and foci of law and propose that the process of law-making, implementation and evaluation can provide a benefit for strengthening law as a fixture between One Health interfaces...
June 1, 2017: Transactions of the Royal Society of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/29023546/steroid-hormones-and-psychological-responses-to-soccer-matches-insights-from-a-systematic-review-and-meta-analysis
#17
REVIEW
Maamer Slimani, Julien S Baker, Foued Cheour, Lee Taylor, Nicola Luigi Bragazzi
The present systematic review and meta-analysis aimed to assess the perturbations in hormonal and psychological homeostasis in response to soccer match-play. These perturbations were explored according to match outcome (i.e., win versus loss), gender, type of contest (i.e., competitive versus non-competitive fixtures) and competitive level (i.e., novice versus high-level). The review was conducted according to the Population/Intervention or Exposure/Comparison/Outcome(s) (PICO) criteria and the Preferred Reporting Items for Systematic Reviews and Meta-analyses (PRISMA) guidelines...
2017: PloS One
https://www.readbyqxmd.com/read/29023324/the-physical-response-to-a-simulated-period-of-soccer-specific-fixture-congestion
#18
Richard M Page, Kelly Marrin, Chris M Brogden, Matt Greig
The aim of this study was to assess the physiological, perceptual, and mechanical measures associated with the completion of a simulated period of short-term soccer-specific fixture congestion. Ten male semi-professional soccer players completed three trials of a treadmill-based match simulation, with 48 hours intervening each trial. A repeated measures general linear model identified significantly (P= 0.02) lower knee flexor peak torque (PT) recorded at 300 degs[BULLET OPERATOR]s in the second (141.27 ± 28...
October 10, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28991418/agrochemical-lead-optimization-by-scaffold-hopping
#19
REVIEW
Clemens Lamberth
Scaffold hopping, the exchange of a specific portion of a potential active ingredient by another substructure with the aim to find isofunctional molecular structures with significantly different molecular backbones, often offers the chance in lead discovery or optimization to mitigate problems related to toxicity, intellectual property, and insufficient potency or stability. Scaffold hopping tools such as isosteric ring replacement including 1,3 nitrogen shift and cyclic imine - amide isosterism, but also ring opening and ring closure approaches, functional group isosterism, reversion of functional groups, chain shortening, chain lengthening, and scaffolds delivered by natural products have become a permanent fixture of the innovation and optimization process in crop protection research...
October 9, 2017: Pest Management Science
https://www.readbyqxmd.com/read/28980498/design-construction-and-in-vivo-feasibility-of-a-positioning-device-for-irradiation-of-mice-brains-using-a-clinical-linear-accelerator-and-intensity-modulated-radiation-therapy
#20
Nicholas J Rancilio, Shaun Dahl, Ilektra Athanasiadi, Carlos J Perez-Torres
PURPOSE: The goal of this study was to design a positioning device that would allow for selective irradiation of the mouse brain with a clinical linear accelerator. METHODS: We designed and fabricated an immobilization fixture that incorporates three functions: head stabilizer (through ear bars and tooth bar), gaseous anesthesia delivery and scavenging, and tissue mimic/bolus. Cohorts of five mice were irradiated such that each mouse in the cohort received a unique dose between 1000 and 3000 cGy...
October 5, 2017: International Journal of Radiation Biology
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