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https://www.readbyqxmd.com/read/27919918/effectiveness-of-foot-orthoses-and-shock-absorbing-insoles-for-the-prevention-of-injury-a-systematic-review-and-meta-analysis
#1
Daniel R Bonanno, Karl B Landorf, Shannon E Munteanu, George S Murley, Hylton B Menz
OBJECTIVE: To investigate the evidence relating to the effectiveness of foot orthoses and shock-absorbing insoles for the prevention of musculoskeletal injury. DESIGN: Systematic review and meta-analysis. ELIGIBILITY CRITERIA FOR SELECTING STUDIES: Clinical trials evaluating the effectiveness of foot orthoses and shock-absorbing insoles for the prevention of injury. DATA SOURCES: Cochrane Library, CINAHL, EMBASE, MEDLINE and SPORTDiscus from their inception up to the first week of June 2016...
December 5, 2016: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/27918290/nacre-mimetic-bulk-lamellar-composites-reinforced-with-high-aspect-ratio-glass-flakes
#2
Selen N Gurbuz Guner, Arcan F Dericioglu
Nacre-mimetic epoxy matrix composites reinforced with readily available micron-sized high aspect ratio C-glass flakes were fabricated by a relatively simple, single-step, scalable, time, cost and man-power effective processing strategy: hot-press assisted slip casting (HASC). HASC enables the fabrication of preferentially oriented two-dimensional inorganic reinforcement-polymer matrix bulk lamellar composites with a micro-scale structure resembling the brick-and-mortar architecture of nacre. By applying the micro-scale design guideline found in nacre and optimizing the relative volume fractions of the reinforcement and the matrix as well as by anchoring the brick-and-mortar architecture, and tailoring the interface between reinforcements and the matrix via silane coupling agents, strong, stiff and tough bio-inspired nacre-mimetic bulk composites were fabricated...
December 5, 2016: Bioinspiration & Biomimetics
https://www.readbyqxmd.com/read/27917513/torsional-and-bending-resistance-of-waveone-gold-reciproc-and-twisted-file-adaptive-instruments
#3
S E Elsaka, A M Elnaghy, A E Badr
AIM: To compare the torsional and bending resistance of WaveOne Gold (Dentsply Tulsa Dental Specialties, Tulsa, OK, USA), Reciproc (VDW, Munich, Germany) and Twisted File Adaptive (Axis/SybronEndo, Orange, CA, USA) instruments. METHODOLOGY: Torsional strength of WaveOne Gold primary size 25, .07 taper, Reciproc size 25, .08 taper and Twisted File Adaptive M-L1 size 25, .08 taper was measured by fastening the apical 3 mm of the instrument firmly and applying a constant rotation at 2 rpm to the instrument using a torsiometer...
December 5, 2016: International Endodontic Journal
https://www.readbyqxmd.com/read/27917349/effect-of-acute-salinity-stress-on-ion-homeostasis-na-k-atpase-and-histological-structure-in-sea-cucumber-apostichopus-japonicus
#4
Chenfan Geng, Yi Tian, Yanpeng Shang, Liqiang Wang, Yanan Jiang, Yaqing Chang
BACKGROUND: Sea cucumbers (Apostichopus japonicus) are an imperiled fauna exposed to a variety of environmental condition such as salinity and studies are urgently needed to assess their effects to guide aquaculture efforts. The effects of acute salinity stress on coelomic fluid osmotic pressure, ion concentrations, the activity of Na(+)/K(+)-ATPase in respiratory trees and the histological variations were measured to evaluate the salinity tolerance of sea cucumbers. RESULTS: Significant correlations in osmotic pressure were observed between coelomic fluid and ambient environmental salinity...
2016: SpringerPlus
https://www.readbyqxmd.com/read/27914011/activation-of-alpha-7-nicotinic-acetylcholine-receptor-reduces-brain-edema-in-mice-with-ischemic-stroke-and-bone-fracture
#5
Dingquan Zou, Man Luo, Zhenying Han, Lei Zhan, Wan Zhu, Shuai Kang, Chen Bao, Zhao Li, Jeffrey Nelson, Rui Zhang, Hua Su
Stroke is an important risk factor for bone fracture. We showed previously that bone fracture at the acute stage of ischemic stroke worsens, and activation of α-7 nicotinic acetylcholine receptor (α-7 nAchR) improves, stroke recovery by attenuating inflammation. We hypothesized that activation of α-7 nAchR also improves the blood-brain barrier (BBB) integrity. Permanent distal middle cerebral artery occlusion (pMCAO) was performed on C57BL/6J mice followed by tibia fracture 1 day later. Mice were treated with 0...
December 2, 2016: Molecular Neurobiology
https://www.readbyqxmd.com/read/27913339/a-parametric-study-for-the-design-of-an-optimized-ultrasonic-percussive-planetary-drill-tool
#6
Xuan Li, Patrick Harkness, Kevin Worrall, Ryan Timoney, Margaret Lucas
Traditional rotary drilling for planetary rock sampling, in-situ analysis and sample return, is challenging because the axial force and holding torque requirements are not necessarily compatible with lightweight spacecraft architectures in low-gravity environments. This article seeks to optimize an ultrasonic-percussive drill tool to achieve rock penetration with lower reacted force requirements, with a strategic view towards building an Ultrasonic Planetary Core Drill (UPCD) device. The UPCD is a descendant of the Ultrasonic/Sonic Driller/Corer (USDC) technique...
November 29, 2016: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
https://www.readbyqxmd.com/read/27911229/c-2-arteriovenous-fistula-presenting-as-a-pathologic-hangman-s-fracture-case-report
#7
Rajeev D Sen, Carolina Gesteira Benjamin, Howard A Riina, Donato Pacione
The authors report on an 81-year-old woman with a pathologic hangman's fracture secondary to a complex arteriovenous fistula (AVF). The patient presented with severe, unremitting neck pain and was found to have fractures bilaterally through the pars interarticularis of C-2 with significant anterior subluxation of C-2 over C-3 along with widening of the left transverse foramen. Due to an abnormally appearing left vertebral artery (VA) on CT angiography, the patient underwent conventional angiography, which revealed a complex AVF stemming from the left VA at the level of C-2 with dilated posterior cervical veins and a large venous varix...
December 2, 2016: Journal of Neurosurgery. Spine
https://www.readbyqxmd.com/read/27904716/is-anterior-bridge-plating-for-mid-shaft-humeral-fractures-a-suitable-option-for-patients-predominantly-involved-in-overhead-activities-a-functional-outcome-study-in-athletes-and-manual-laborers
#8
Abhishek S Mahajan, Young Gun Kim, Jae Hwa Kim, Prashanth D'sa, Azhar Lakhani, Hyun Soo Ok
BACKGROUND: To assess the functional and radiological outcomes of minimally invasive anterior bridge plating (ABP) for mid-shaft humerus fractures in patients predominantly involved in overhead activities (athletes and manual laborers). METHODS: Forty-eight patients fulfilling inclusion criteria were treated with ABP at a level-I trauma center using a 4.5-mm dynamic/locking compression plate and followed for a period of 1 year. Functional outcome was assessed using the Constant, Mayo elbow, and Disabilities of the Arm, Shoulder and Hand (DASH) scores...
December 2016: Clinics in Orthopedic Surgery
https://www.readbyqxmd.com/read/27903837/the-effect-of-army-vest-design-on-the-occurrence-of-stress-fractures-and-overuse-injuries-in-female-military-recruits
#9
Ezequiel Palmanovich, M Frankl, M Nyska, I Hetsroni, N Constantini, L Trejo, R Bechar, G Novak, Z Lankovsky, G Mann
INTRODUCTION: Stress fractures (SFs) occur when microdamage caused by repetitive mechanical load exceeds the biological load-bearing capacity of the bone. The study objective was to test whether a vest specifically designed and manufactured for female recruits, compared with the standard vest used on a regular basis by Border Police recruits, would reduce the incidence of SF in female Border Police recruits. Data based on reports of military personnel show that women are more likely to sustain SFs...
November 30, 2016: Journal of the Royal Army Medical Corps
https://www.readbyqxmd.com/read/27894051/the-influence-of-sr-on-the-microstructure-degradation-and-stress-corrosion-cracking-of-the-mg-alloys-zk40xsr
#10
Lianxi Chen, Yuanhong Bin, Wenqi Zou, Xiaojian Wang, Wei Li
In the present work, new magnesium (Mg) alloys (Mg-4Zn-0.6Zr-xSr, x=0, 0.4, 0.8, 1.2, 1.6wt%; ZK40xSr) were prepared and studied as potential biodegradable materials. The influence of strontium (Sr) addition on the properties of the new Mg alloys was investigated, which included microstructure, corrosion degradation, and the stress corrosion cracking (SCC) susceptibility. The average grain size of the ZK40Sr was approximately 100µm, which was significantly smaller than that of ZK40 alloy without Sr (402.3±40...
November 18, 2016: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/27893449/biaxially-stretchable-silver-nanowire-conductive-film-embedded-in-a-taro-leaf-templated-pdms-surface
#11
Chunhui Wu, Jinting Jiu, Teppei Araki, Hirotaka Koga, Tsuyoshi Sekitani, Hao Wang, Katsuaki Suganuma
A biaxially wave-shaped polydimethylsiloxane (PDMS) surface was developed simply by using a taro leaf as the template. The resulting leaf-templated PDMS (L-PDMS) possesses a micro-sized curved interface structure, which is greatly beneficial for the exact embedding of a silver nanowire (AgNW) network conductive film covering the L-PDMS surface. The intrinsically curved AgNW/L-PDMS film surface, without any dangling nanowire, could prevent the fracture of AgNWs due to stretching stress even after cyclic stretching...
January 6, 2017: Nanotechnology
https://www.readbyqxmd.com/read/27892840/adhesive-cementation-promotes-higher-fatigue-resistance-to-zirconia-crowns
#12
F Campos, L F Valandro, S A Feitosa, C J Kleverlaan, A J Feilzer, N de Jager, M A Bottino
OBJECTIVE: The aim of this study was to investigate the influence of the cementation strategy on the fatigue resistance of zirconia crowns. The null hypothesis was that the cementation strategy would not affect the fatigue resistance of the crowns. METHODS AND MATERIALS: Seventy-five simplified molar tooth crown preparations were machined in glass fiber-filled epoxy resin. Zirconia crowns were designed (thickness=0.7 mm), milled by computer-aided design/computer-aided manufacturing, and sintered, as recommended...
November 28, 2016: Operative Dentistry
https://www.readbyqxmd.com/read/27891426/palatonasal-fistula-repair-a-case-of-unanticipated-difficult-intubation
#13
Hemraj Tungaria, Lalit K Raiger, Rajkumar Paliwal, Shekhar Suman Saxena, Bishan Kumar Bairwa
Patients with present or previous history of facio-maxillary trauma will mostly be associated with a difficult airway. Surgical correction of these injuries might not always correct the altered airway. We report a case of palatonasal fistula following an old facio-maxillary fracture, which has led to interpretation of a difficult airway into a normal one. The patient was found to be having difficult airway during direct laryngoscopy which caused failure to intubate initially. Though, the patient was successfully intubated in the third attempt by senior anaesthesiologist making use of manoeuvres and equipment available, it made an impact for us to do a proper pre-op evaluation of patients with history of surgical correction of facial injuries and also for being prepared for can't ventilate and can't intubate situation in such type of cases...
October 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/27890357/effect-of-cement-space-on-stress-distribution-in-y-tzp-based-crowns
#14
Carlos Eduardo Edwards Rezende, Ana Flávia Sanches Borges, Carla Castiglia Gonzaga, Yuanyuan Duan, José Henrique Rubo, Jason Alan Griggs
OBJECTIVE: To evaluate the stress distribution in bi-layered Y-TZP based crowns, according to the occlusal internal spacing between coping and abutment. METHODS: Twelve premolar shaped Y-TZP copings were made by a CAD/CAM system and seated on an abutment to evaluate the internal fit at the occlusal third using micro-CT images. Considering the fitting range obtained experimentally, two 3D finite element models, consisting on bone tissue, a titanium implant, a zirconia abutment, cement layer and a bi-layered Y-TZP ceramic crown were constructed based on the micro-CT images, one corresponding to the thinnest cement space and other representing the specimen with the thickest cement space obtained experimentally...
November 24, 2016: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/27890355/the-effects-of-cavity-margin-angles-and-bolus-stiffness-on-the-mechanical-behavior-of-indirect-resin-composite-class-ii-restorations
#15
Pietro Ausiello, Stefano Ciaramella, Franklin Garcia-Godoy, Antonio Gloria, Antonio Lanzotti, Saverio Maietta, Massimo Martorelli
OBJECTIVE: To study the influence of the different class II mesio-occlusal-distal (MOD) cavity shape on the stress and strain distributions in adhesive indirect restorations, using numerical finite element analysis (FEA). To investigate the relationship between restored teeth failure and stiffness of food, three values of Young's modulus were used for the food. METHODS: A 3D model of a sound lower molar and three class II MOD cavities with different shape were created...
November 24, 2016: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/27886841/management-of-upper-extremity-injury-in-divers
#16
REVIEW
Steven C Haase
Modern competitive diving-especially platform diving-applies dramatic stress to the upper extremity. Some stress occurs during handstand-style takeoffs, but more force is delivered to the hand, wrist, elbow, and shoulder during hands-first entry. Hand positions that minimize the amount of splash result in forceful wrist extension. This repetitive impact can lead to chronic upper extremity pain and acute injuries that require operative intervention. Many divers use taping and bracing to prevent or treat this type of injury, but these are only modestly effective...
February 2017: Hand Clinics
https://www.readbyqxmd.com/read/27886834/upper-extremity-injuries-in-gymnasts
#17
REVIEW
Megan R Wolf, Daniel Avery, Jennifer Moriatis Wolf
Gymnastics is a unique sport, which loads the wrist and arms as weight-bearing extremities. Because of the load demands on the wrist in particular, stress fractures, physeal injury, and overuse syndromes may be observed. This spectrum of injury has been termed "gymnast's wrist," and incorporates such disorders as wrist capsulitis, ligamentous tears, triangular fibrocartilage complex tears, chondromalacia of the carpus, stress fractures, distal radius physeal arrest, and grip lock injury.
February 2017: Hand Clinics
https://www.readbyqxmd.com/read/27882276/isolated-non-traumatic-bilateral-coronoid-process-fracture-of-the-mandible
#18
Nabil Al-Khalisi, Krishna Kumar, Natasha Acosta
Isolated bilateral fractures of the coronoid processes of the mandible occurred in this patient without any significant trauma. The definite etiology of this case is unknown, but possible causes or contributing factors may include acute reflex contraction of the patient's temporalis muscles leading to bilateral stress fractures, coronoid process hyperplasia, or the patient's long-term use of omeprazole. The planned treatment for this patient included pain control with Mobic and tramadol and splint fabrication followed by arch bar placement with training elastics for six weeks...
October 13, 2016: Curēus
https://www.readbyqxmd.com/read/27881384/excess-stress-fractures-musculoskeletal-injuries-and-health-care-utilization-among-unfit-and-overweight-female-army-trainees
#19
Margot R Krauss, Nadia U Garvin, Michael R Boivin, David N Cowan
BACKGROUND: Musculoskeletal injuries are prevalent among military trainees and certain occupations. Fitness and body mass index (BMI) have been associated with musculoskeletal conditions, including stress fractures. HYPOTHESIS: The incidence of, and excess health care utilization for, stress fracture and non-stress fracture overuse musculoskeletal injuries during the first 6 months of service is higher among unfit female recruits. Those who exceeded body fat limits are at a greater risk of incident stress fractures, injuries, or health care utilization compared with weight-qualified recruits...
November 23, 2016: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/27881319/influence-of-remaining-tooth-structure-and-restorative-material-type-on-stress-distribution-in-endodontically-treated-maxillary-premolars-a-finite-element-analysis
#20
Junxin Zhu, Qiguo Rong, Xiaoyan Wang, Xuejun Gao
STATEMENT OF PROBLEM: How tooth preparation and material type affect the stress distribution of endodontically treated teeth restored with endocrowns remains unclear. PURPOSE: The purpose of this finite element (FE) study was to determine the influence of the quantity of remaining dental tissues and material type on stress distribution in endodontically treated maxillary premolars using 3-dimensional FE analysis. MATERIAL AND METHODS: Five 3-dimensional FE models were constructed on the basis of the restorative methods used and the quantity of preserved tooth tissues: a sound maxillary premolar, an endodontically treated maxillary premolar restored with composite resin, and endodontically treated maxillary premolars restored with endocrowns with thicknesses of 1...
October 27, 2016: Journal of Prosthetic Dentistry
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