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https://www.readbyqxmd.com/read/29313156/frequency-of-self-reported-concussion-amongst-professional-and-semi-professional-footballers-in-ireland-during-the-2014-season-a-cross-sectional-study
#1
Nicola Coffey, Martin Lawless, Seamus Kelly, Conor Buggy
BACKGROUND: This paper examines the occupational risk of concussion amongst professional and semi-professional footballers in Ireland during the 2014 League of Ireland season. As part of a broader nationally representative study examining occupational safety and health (OSH) awareness amongst professional footballers, this empirical quantitative study, utilising a convenience sample is the first and largest investigation of the frequency of, and attitudes towards, concussion and concussion reporting amongst Irish senior professional and semi-professional footballers...
January 8, 2018: Sports Medicine—Open
https://www.readbyqxmd.com/read/29306080/hybrid-micro-nanostructural-surface-offering-improved-stress-distribution-and-enhanced-osseointegration-properties-of-the-biomedical-titanium-implant
#2
Ping-Jen Hou, Keng-Liang Ou, Chin-Chieh Wang, Chiung-Fang Huang, Muhammad Ruslin, Erwan Sugiatno, Tzu-Sen Yang, Hsin-Hua Chou
OBJECTIVES: The aim of the present study was to investigate the surface characteristic, biomechanical behavior, hemocompatibility, bone tissue response and osseointegration of the optimal micro-arc oxidation surface-treated titanium (MST-Ti) dental implant. MATERIALS AND METHODS: The surface characteristic, biomechanical behavior and hemocompatibility of the MST-Ti dental implant were performed using scanning electron microscope, finite element method, blood dripping and immersion tests...
November 27, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/29306079/spatial-variation-of-bone-biomechanical-properties-around-a-dental-implant-using-nanoindentation-a-case-study
#3
Hyung-In Yoon, Min-Jeong Jeon, Hye-Lee Kim, Do-Gyoon Kim, Jung-Suk Han
The aim of the study was to evaluate the spatial variations in the biomechanical properties of the bone around the implants retrieved from human subjects due to fixture head fracture after almost 20 years of loading. The implant-in-bone specimens were prepared for the histomorphometry and nanoindentation test to measure the bone-to-implant contact ratio (BIC ratio) and elastic modulus (E) of peri-implant bone. The indentations were performed in the up, center, down, and away regions of the bone tissues within all the thread spaces...
December 28, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/29288072/scanning-electron-microscopy-and-microbiological-approaches-for-the-evaluation-of-salivary-microorganisms-behaviour-on-anatase-titanium-surfaces-in-vitro-study
#4
S Bernardi, S Bianchi, G Botticelli, E Rastelli, A R Tomei, M G Palmerini, M A Continenza, G Macchiarelli
Implantology research framed the implant surface as a key element for a good and sustainable osseointegration of an implant fixture. The aim of this study was to analyze the antibacterial properties of anatase-coated titanium healing screws through microbiological and scanning electron microscopy. The comparison of the bacterial colonies growth between the anatase-coated titanium healing screws and non-coated titanium healing screws showed comparable antibacterial properties, without significant statistical differences...
December 26, 2017: Morphologie: Bulletin de L'Association des Anatomistes
https://www.readbyqxmd.com/read/29258208/scanning-electron-microscope-sem-evaluation-of-the-interface-between-a-nanostructured-calcium-incorporated-dental-implant-surface-and-the-human-bone
#5
Francesco Mangano, Mario Raspanti, Hassan Maghaireh, Carlo Mangano
Purpose. The aim of this scanning electron microscope (SEM) study was to investigate the interface between the bone and a novel nanostructured calcium-incorporated dental implant surface in humans. Methods. A dental implant (Anyridge®, Megagen Implant Co., Gyeongbuk, South Korea) with a nanostructured calcium-incorporated surface (Xpeed®, Megagen Implant Co., Gyeongbuk, South Korea), which had been placed a month earlier in a fully healed site of the posterior maxilla (#14) of a 48-year-old female patient, and which had been subjected to immediate functional loading, was removed after a traumatic injury...
December 17, 2017: Materials
https://www.readbyqxmd.com/read/29249883/effect-of-joining-the-sectioned-implant-supported-prosthesis-on-the-peri-implant-strain-generated-in-simulated-mandibular-model
#6
Ipsha Singh, K Chandrasekharan Nair, Jayakar Shetty
Aim: The aim of this study is to evaluate the strain developed in simulated mandibular model before and after the joining of an implant-supported screw-retained prosthesis by different joining techniques, namely, arc welding, laser welding, and soldering. Materials and Methods: A specimen simulating a mandibular edentulous ridge was fabricated in heat-cured acrylic resin. 4-mm holes were drilled in the following tooth positions; 36, 33, 43, 46. Implant analogs were placed in the holes...
October 2017: Journal of Indian Prosthodontic Society
https://www.readbyqxmd.com/read/29235330/implant-fixtures-and-abutment-considerations
#7
Michael Tischler
No abstract text is available yet for this article.
March 2017: Dentistry Today
https://www.readbyqxmd.com/read/29232643/mechanical-corrosion-and-biocompatibility-behaviour-of-mg-3zn-ha-biodegradable-composites-for-orthopaedic-fixture-accessories
#8
Satish Jaiswal, R Manoj Kumar, Pallavi Gupta, Murali Kumaraswamy, Partha Roy, Debrupa Lahiri
Development of biodegradable implants has grown into one of the important areas in medical science. Degradability becomes more important for orthopaedic accessories used to support fractured and damaged bones, in order to avoid second surgery for their removal after healing. Clinically available biodegradable orthopaedic materials are mainly made of polymers or ceramics. These orthopaedic accessories have an unsatisfactory mechanical strength, when used in load-bearing parts. Magnesium and its alloys can be suitable candidate for this purpose, due to their outstanding strength to weight ratio, biodegradability, non-toxicity and mechanical properties, similar to natural bone...
November 21, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/29201970/comparison-of-the-marginal-bone-loss-in-one-stage-versus-two-stage-implant-surgery
#9
Rasoul Gheisari, Hesamuddin Eatemadi, Akram Alavian
Statement of the Problem: Dental implant is one of the best choices for reconstruction of aesthetic and function. High success rate of these treatments are related to some considerations such as case selection, implant system selection and surgical methods. One-stage or two-stage surgical approaches are routine surgical methods in dental implant treatments. The minimum rate of bone loss around fixtures is the most important criteria for evaluation of implant treatment success that can be affected by different methods of surgery...
December 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/29193643/performance-metrics-for-guidance-active-constraints-in-surgical-robotics
#10
Nima Enayati, Giancarlo Ferrigno, Elena De Momi
Active constraint (AC)/virtual fixture (VF) is among the most popular approaches towards the shared execution of subtasks by the surgeon and robotic systems. As more possibilities appear for the implementation of ACs in surgical scenarios, the need to introduce methods that guarantee a safe and intuitive user-interaction increases. The presence of the human in the loop adds a layer of interactivity and adaptability that renders the assessment of such methods non-trivial. In most works, guidance ACs have been evaluated mainly in terms of enhancement of accuracy and completion time with little regard for other aspects such as human factors, even though the continuous engagement of these methods can considerably degrade the user experience...
November 28, 2017: International Journal of Medical Robotics + Computer Assisted Surgery: MRCAS
https://www.readbyqxmd.com/read/29183670/using-glass-graded-zirconia-to-increase-delamination-growth-resistance-in-porcelain-zirconia-dental-structures
#11
Herzl Chai, Adam J Mieleszko, Stephen J Chu, Yu Zhang
OBJECTIVE: Porcelain fused to zirconia (PFZ) restorations are widely used in prosthetic dentistry. However, their tendency to delaminate along the P/Z interface remains a practical problem so that assessing and improving the interfacial strength are important design aspects. This work examines the effect of modifying the zirconia veneering surface with an in-house felspathic glass on the interfacial fracture resistance of fused P/Z. METHODS: Three material systems are studied: porcelain fused to zirconia (control) and porcelain fused to glass-graded zirconia with and without the presence of a glass interlayer...
November 25, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/29156302/monitoring-the-effect-of-football-match-congestion-on-hamstring-strength-and-lower-limb-flexibility-potential-for-secondary-injury-prevention
#12
Martin Wollin, Kristian Thorborg, Tania Pizzari
OBJECTIVES: To investigate the effect of competitive football match congestion on hamstring strength and lower limb flexibility. DESIGN: Repeated measures. SETTING: Elite male youth football. PARTICIPANTS: Fifteen male elite youth football players from the national football association centre of excellence were included (age = 15.81 ±0.65 years, height = 171.95 ±6.89 cm, weight = 65.93 ±7.53 kg). MAIN OUTCOME MEASURES: Hamstring strength and pain, ankle dorsiflexion, hip extension, knee extension and flexion range of motion...
September 15, 2017: Physical Therapy in Sport
https://www.readbyqxmd.com/read/29151845/measuring-the-compressive-modulus-of-elasticity-of-pith-filled-plant-stems
#13
Loay A Al-Zube, Daniel J Robertson, Jean N Edwards, Wenhuan Sun, Douglas D Cook
Background: The compressional modulus of elasticity is an important mechanical property for understanding stalk lodging, but this property is rarely available for thin-walled plant stems such as maize and sorghum because excised tissue samples from these plants are highly susceptible to buckling. The purpose of this study was to develop a testing protocol that provides accurate and reliable measurements of the compressive modulus of elasticity of the rind of pith-filled plant stems. The general approach was to relying upon standard methods and practices as much as possible, while developing new techniques as necessary...
2017: Plant Methods
https://www.readbyqxmd.com/read/29142641/accuracy-of-several-implant-bite-registration-techniques-an-in-vitro-pilot-study
#14
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
#15
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
#16
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...
December 2017: Implant Dentistry
https://www.readbyqxmd.com/read/29118716/etiology-and-recovery-of-neuromuscular-fatigue-following-competitive-soccer-match-play
#17
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
#18
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
#19
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
#20
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
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