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https://www.readbyqxmd.com/read/29150929/biomechanical-properties-of-feline-ventral-abdominal-wall-and-celiotomy-closure-techniques
#1
Fernando S Reina Rodriguez, Conor T Buckley, Joshua Milgram, Barbara M Kirby
OBJECTIVE: To compare biomechanical properties and mechanism of failure of 3 regions of ventral abdominal wall in cats by using 2 suture materials, 2 suture bite-to-stitch intervals (SBSI), and full-thickness versus fascia-only closure. STUDY DESIGN: Randomized, cadaveric, ex vivo mechanical testing. SAMPLE POPULATION: 16 adult cat cadavers, 3 samples per cat. METHODS: Three regions of ventral abdominal wall were mechanically tested (N = 48 samples)...
November 18, 2017: Veterinary Surgery: VS
https://www.readbyqxmd.com/read/29149185/linezolid-and-atorvastatin-impact-on-pneumonia-caused-by-staphyloccocus-aureus-in-rabbits-with-or-without-mechanical-ventilation
#2
Laure-Anne Pauchard, Mathieu Blot, Rémi Bruyere, Saber-Davide Barbar, Delphine Croisier, Lionel Piroth, Pierre-Emmanuel Charles
Pneumonia may involve methicillin-resistant Staphylococcus aureus (MRSA), with elevated rates of antibiotics failure. The present study aimed to assess the effect of statins given prior to pneumonia development. Spontaneously breathing (SB) or mechanically ventilated (MV) rabbits with pneumonia received atorvastatin alone, linezolid (LNZ) alone, or a combination of both (n = 5 in each group). Spontaneously breathing and MV untreated infected animals (n = 11 in each group), as well as uninfected animals (n = 5 in each group) were used as controls...
2017: PloS One
https://www.readbyqxmd.com/read/29148630/men-exhibit-greater-fatigue-resistance-than-women-in-alternated-bench-press-and-leg-press-exercises
#3
Estêvão R Monteiro, James Steele, Jefferson S Novaes, Amanda F Brown, Mark T Cavanaugh, Jakob L Vingren, David G Behm
BACKGROUND: The purpose of this study was to evaluate the influence of sex, exercise order, and rest interval on neuromuscular fatigue resistance for an alternated strength training sequence of bench press (BP) and leg press (LP) exercises. METHODS: Twelve women and 16 men, both recreationally trained, performed four sessions in a random order: 1) BP followed by LP with three-minutes rest (BP+LP with rest), 2) LP followed by BP with three-minutes rest (LP+BP with rest), 3) BP followed by LP without rest interval (BP+LP no rest), and 4) LP followed by BP without rest interval (LP+BP no rest)...
November 17, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29148161/piezoelectric-versus-conventional-implant-site-preparation-a-systematic-review-and-meta-analysis
#4
REVIEW
Momen A Atieh, Nabeel H M Alsabeeha, Andrew Tawse-Smith, Warwick J Duncan
BACKGROUND: The use of a piezoelectric device (PED) for implant site preparation (ISP) has been introduced to overcome the limitations of using conventional drills (CDs). With little and inconsistent information in the literature regarding their efficiency for preparing implant osteotomies, the objective of this systematic review was to compare the use of CDs to PEDs for ISP with regard to implant stability values, marginal bone level changes, operating time, and dental implant failure rate...
November 16, 2017: Clinical Implant Dentistry and related Research
https://www.readbyqxmd.com/read/29146396/effect-of-implant-loading-protocols-on-failure-and-marginal-bone-loss-with-unsplinted-two-implant-supported-mandibular-overdentures-systematic-review-and-meta-analysis
#5
REVIEW
M H E-D Helmy, A Y Alqutaibi, A A El-Ella, A F Shawky
The aim of this study was to compare implant failure and radiographic bone level changes with different loading protocols for unsplinted two-implant-supported mandibular overdentures. An electronic search of two databases (PubMed, Cochrane Library) was performed, without language restriction, to identify randomized controlled trials (RCTs) comparing immediate or early versus conventional dental implant loading protocols for unsplinted two-implant-supported mandibular overdentures. Data were extracted independently by two reviewers...
November 13, 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29146163/a-comparative-biomechanical-study-of-femoral-cortical-suspension-devices-for-soft-tissue-anterior-cruciate-ligament-reconstruction-adjustable-length-loop-versus-fixed-length-loop
#6
Moon Jong Chang, Tae Soo Bae, Young-Wan Moon, Jin Hwan Ahn, Joon Ho Wang
PURPOSE: To determine whether there are differences between adjustable-length loop and fixed-length loop devices in terms of the amount of displacement, temporal pattern of displacement, and ultimate failure load when tested using 4,500 cycles of sinusoidal loading with high loads (100-400 N). METHODS: Two cortical suspension devices with a fixed- or adjustable-length loop were tested. For our comparisons, a 20-mm fixed-length loop device and a fixed-length loop device with the same loop length were used...
November 13, 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/29146161/intraoperative-workflow-for-all-inside-anterior-cruciate-ligament-reconstruction-an-in%C3%A2-vitro-biomechanical-evaluation-of-preconditioning-and-knot-tying
#7
Edoardo Monaco, Samuel Bachmaier, Mattia Fabbri, Riccardo Maria Lanzetti, Coen A Wijdicks, Andrea Ferretti
PURPOSE: To evaluate and compare the effect of preconditioning according to intraoperative workflow on the elongation behavior of single-side and fully knotted all-inside anterior cruciate ligament (ACL) reconstruction configurations in a biomechanical in vitro study. METHODS: Four full construct all-inside ACL reconstruction groups (n = 8 per group) were tested using porcine tibias and bovine tendons. Groups included both an all-inside configuration with one- (group 1) and both-side knotted adjustable loop-length devices (group 2), without and with performing intraoperative preconditioning (group 1-intraoperative preconditioned [IPC], group 2-IPC)...
November 13, 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/29144772/subchondral-bone-degradation-after-microfracture-for-osteochondral-lesions-of-the-talus-an-mri-analysis
#8
Yoshiharu Shimozono, Max Coale, Youichi Yasui, Amanda O'Halloran, Timothy W Deyer, John G Kennedy
BACKGROUND: Microfracture is the most common cartilage-reparative procedure for the treatment of osteochondral lesions of the talus (OLTs). Damage to the subchondral bone (SCB) during microfracture may irreversibly change the joint-loading support of the ankle, leading to reparative fibrocartilage degradation over time. PURPOSE: To investigate the morphological change in the SCB after microfracture for OLT by developing a novel magnetic resonance imaging (MRI) scoring system specifically for evaluating the SCB...
November 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29143842/wrinkling-formation-in-simply-supported-graphenes-under-tension-and-compression-loadings
#9
Ch Androulidakis, E N Koukaras, M G Pastore Carbone, M Hadjinicolaou, C Galiotis
Wrinkles in supported graphenes can be formed either by uniaxial compression or uniaxial tension beyond a certain critical load depending on the mode of loading. In the first case, the wrinkling direction is normal to the compression axis whereas in tension, wrinkles of the same pattern are formed parallel to the loading direction due to Poisson's (lateral) contraction. Herein we show by direct AFM observations that in simply-supported graphenes such instabilities appear as periodic wrinkles over existing stochastic undulations caused by the underlying-substrate-roughness...
November 16, 2017: Nanoscale
https://www.readbyqxmd.com/read/29143388/in-vitro-assessment-of-retention-and-resistance-failure-loads-of-teeth-restored-with-a-complete-coverage-restoration-and-different-core-materials
#10
Vasileia Tsiagali, Yvoni Kirmanidou, Argirios Pissiotis, Konstantinos Michalakis
PURPOSE: To investigate in vitro the retention and the resistance form, as well as the failure modes of maxillary premolars restored with cast metal crowns and different core materials. MATERIALS AND METHODS: Sixty human extracted maxillary premolars were selected according to their size and were embedded in PMMA resin blocks. After removing a part of their clinical crowns, the teeth were randomly divided into 3 groups of 20 teeth and were either left unrestored, or they were restored with amalgam or composite resin...
November 16, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29142312/understanding-the-anticorrosive-protective-mechanisms-of-modified-epoxy-coatings-with-improved-barrier-active-and-self-healing-functionalities-eis-and-spectroscopic-techniques
#11
Demian I Njoku, Miaomiao Cui, Haigang Xiao, Baihui Shang, Ying Li
The present investigation adopted long-term in-situ electrochemical and spectroscopic approaches to study the combined active, self-healing and passive protective mechanisms of a new class of innovative anti-corrosive coatings based on epoxy doped with clay nanotubes impregnated with active species for the protection of carbon steel in 3.5% NaCl solution. The suitability of the as-received clay nanotubes to encapsulate the active agents was confirmed by different spectroscopic measurements. Tube end stopper with Ferric ion and polymer encapsulation with chitosan cross-linked with glutaraldehyde were adopted to tunnel the release of the active agents loaded into the nanotubes...
November 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29140386/retrospective-study-of-survival-of-extraoral-endosseous-craniofacial-implants-in-head-and-neck-surgery-patients
#12
Brent J Woods, Arun Chandu
PURPOSE: To determine the survival rate of implants placed in different craniofacial locations and factors affecting survival. MATERIALS AND METHODS: This study retrospectively reviewed a consecutive series of patients treated at the Royal Melbourne Hospital who received craniofacial implants for an array of benign and malignant conditions. Implant survival per site and cumulative survival were determined. Surgical and implant variables were assessed using the Kaplan-Meier and Cox Proportional Hazards Models...
November 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/29140377/influence-of-the-prosthetic-index-on-fracture-resistance-of-morse-taper-dental-implants
#13
Karla Zancopé, Caio César Dias Resende, Carolina Guimarães Castro, Rafael Calixto Salatti, Flávio Domingues das Neves
PURPOSE: Manufacturers have inserted a prosthetic index, an internal hexagon to guide prosthetic components inside Morse taper implants. However, it is still unclear if this mechanism could decrease the mechanical strength of Morse taper implants. The aim of this study was to evaluate the influence of the prosthetic index inside Morse taper implants on fracture resistance compared with nonindexed implants. MATERIALS AND METHODS: Fifty-seven Morse taper implants, with 11...
November 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/29140374/implant-abutment-connections-a-review-of-biologic-consequences-and-peri-implantitis-implications
#14
Yuya Sasada, David L Cochran
Clinicians very often have seen marginal bone loss around dental implants at the crest level early on after implant placement and uncovering. Early clinical publications had suggested that this bone loss occurred during the first year of loading. Thus, numerous attempts have been made to minimize or eliminate such bone loss. However, the timing and reason for this bone loss are not always apparent. The objective of this study was to review the evidence regarding marginal bone loss around dental implants from the standpoint of biologic consequences to help understand marginal bone changes around dental implants...
November 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/29140284/crack-propagation-calculations-for-optical-fibers-under-static-bending-and-tensile-loads-using-continuum-damage-mechanics
#15
Yunxia Chen, Yuxuan Cui, Wenjun Gong
Static fatigue behavior is the main failure mode of optical fibers applied in sensors. In this paper, a computational framework based on continuum damage mechanics (CDM) is presented to calculate the crack propagation process and failure time of optical fibers subjected to static bending and tensile loads. For this purpose, the static fatigue crack propagation in the glass core of the optical fiber is studied. Combining a finite element method (FEM), we use the continuum damage mechanics for the glass core to calculate the crack propagation path and corresponding failure time...
November 15, 2017: Sensors
https://www.readbyqxmd.com/read/29140074/facile-and-versatile-strategy-for-construction-of-anti-inflammatory-and-antibacterial-surfaces-with-polydopamine-mediated-liposomes-releasing-dexamethasone-and-minocycline-for-potential-implants-applications
#16
Xiao Xu, Lixin Wang, Zuyuan Luo, Yaofeng Ni, Haitao Sun, Xiang Gao, Yongliang Li, Siqi Zhang, Yan Li, Shicheng Wei
Reducing early nonbacterial inflammation induced by implanted materials and infection resulting from bacterial contamination around the implant-abutment interface could greatly accelerate implant osseointegration and reduce implant failure, which would be of clinical significance. In this study, we developed a facile and versatile strategy for the construction of anti-inflammatory and antibacterial surfaces on implants, such as orthopedic/dental implants. Briefly, the surfaces of polystyrene (PS) culture plates were first coated with polydopamine and then decorated with dexamethasone plus minocycline-loaded liposomes (Dex/Mino liposomes), which was confirmed by contact angle goniometry, X-ray photoelectron spectroscopy, and fluorescence microscopy...
November 15, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29137726/mineralized-collagen-fibril-network-spatial-arrangement-influences-cortical-bone-fracture-behavior
#17
Yaohui Wang, Ani Ural
Bone is a hierarchical material exhibiting different fracture mechanisms at each length scale. At the submicroscale, the bone is composed of mineralized collagen fibrils (MCF). At this scale, the fracture processes in cortical bone have not been extensively studied in the literature. In this study, the influence of MCF size and orientation on the fracture behavior of bone under both transverse and longitudinal loading was investigated using novel 3D models of MCF networks with explicit representation of extra-fibrillar matrix...
November 4, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/29137658/comparison-of-three-different-fixation-constructs-for-radial-neck-fractures-a-biomechanical-study
#18
Hongwei Chen, Dengying Wu, Tianlong Pan, Jun Pan, Rui Zhang, Xuchao Shi
BACKGROUND: Fixation of radial neck fractures can be achieved with a plate and screw construct or with two screws. This study evaluated the biomechanical properties of three different fixation methods following radial neck fractures. METHODS: Twenty-four fourth-generation composite radii were sawed to simulate an unstable radial neck fracture. They were then instrumented with a plate and screw construct or two different orientations (crossed and parallel) of screw fixation...
November 14, 2017: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/29136032/virological-response-and-resistance-among-hiv-infected-children-receiving-long-term-antiretroviral-therapy-without-virological-monitoring-in-uganda-and-zimbabwe-observational-analyses-within-the-randomised-arrow-trial
#19
Alexander J Szubert, Andrew J Prendergast, Moira J Spyer, Victor Musiime, Philippa Musoke, Mutsa Bwakura-Dangarembizi, Patricia Nahirya-Ntege, Margaret J Thomason, Emmanuel Ndashimye, Immaculate Nkanya, Oscar Senfuma, Boniface Mudenge, Nigel Klein, Diana M Gibb, A Sarah Walker
BACKGROUND: Although WHO recommends viral load (VL) monitoring for those on antiretroviral therapy (ART), availability in low-income countries remains limited. We investigated long-term VL and resistance in HIV-infected children managed without real-time VL monitoring. METHODS AND FINDINGS: In the ARROW factorial trial, 1,206 children initiating ART in Uganda and Zimbabwe between 15 March 2007 and 18 November 2008, aged a median 6 years old, with median CD4% of 12%, were randomised to monitoring with or without 12-weekly CD4 counts and to receive 2 nucleoside reverse transcriptase inhibitors (2NRTI, mainly abacavir+lamivudine) with a non-nucleoside reverse transcriptase inhibitor (NNRTI) or 3 NRTIs as long-term ART...
November 2017: PLoS Medicine
https://www.readbyqxmd.com/read/29135578/when-prevention-of-mother-to-child-hiv-transmission-fails-preventing-pretreatment-drug-resistance-in-african-children
#20
Seth C Inzaule, Raph L Hamers, Job Calis, Ragna Boerma, Kim Sigaloff, Clement Zeh, Peter Mugyenyi, Sulaimon Akanmu, Tobias F Rinke de Wit
: The scale-up of antiretroviral prophylaxis to prevent mother-to-child transmission of HIV has significantly reduced new pediatric infections in sub-Saharan Africa. However, among infants who become HIV-infected despite prevent mother-to-child transmission, more than 50% have drug-resistant HIV. Given high levels of resistance, WHO recommends the use of protease inhibitors as part of first-line pediatric antiretroviral therapy (ART) to optimize treatment response, but costs and logistic challenges restrict access...
November 10, 2017: AIDS
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