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https://www.readbyqxmd.com/read/27893512/flap-designs-for-flap-advancement-during-implant-therapy-a-systematic-review
#1
Alexandra B Plonka, Rachel A Sheridan, Hom-Lay Wang
PURPOSE: Guided bone regeneration (GBR) procedures allow ridge augmentation before or at time of implant placement. GBR outcomes rely on primary passive tension-free wound closure, which may be achieved by a variety of flap designs and surgical procedures. A comprehensive literature review of flap design and management is provided, including material types, incision design, reflection, releasing, and suturing techniques. MATERIALS AND METHODS: Two reviewers completed a literature search using the PubMed database and a manual search of relevant journals...
November 23, 2016: Implant Dentistry
https://www.readbyqxmd.com/read/27886175/statistical-power-considerations-in-genotype-based-recall-randomized-controlled-trials
#2
Naeimeh Atabaki-Pasdar, Mattias Ohlsson, Dmitry Shungin, Azra Kurbasic, Erik Ingelsson, Ewan R Pearson, Ashfaq Ali, Paul W Franks
Randomized controlled trials (RCT) are often underpowered for validating gene-treatment interactions. Using published data from the Diabetes Prevention Program (DPP), we examined power in conventional and genotype-based recall (GBR) trials. We calculated sample size and statistical power for gene-metformin interactions (vs. placebo) using incidence rates, gene-drug interaction effect estimates and allele frequencies reported in the DPP for the rs8065082 SLC47A1 variant, a metformin transported encoding locus...
November 25, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27847815/comparison-of-bone-resorption-rates-after-intraoral-block-bone-and-guided-bone-regeneration-augmentation-for-the-reconstruction-of-horizontally-deficient-maxillary-alveolar-ridges
#3
B Alper Gultekin, Elcin Bedeloglu, T Emre Kose, Eitan Mijiritsky
Purpose. Bone atrophy after tooth loss may leave insufficient bone for implant placement. We compared volumetric changes after autogenous ramus block bone grafting (RBG) or guided bone regeneration (GBR) in horizontally deficient maxilla before implant placement. Materials and Methods. In this retrospective study, volumetric changes at RBG or GBR graft sites were evaluated using cone-beam computed tomography. The primary outcome variable was the volumetric resorption rate. Secondary outcomes were bone gain, graft success, and implant insertion torque...
2016: BioMed Research International
https://www.readbyqxmd.com/read/27844503/attentional-capture-by-physically-salient-stimuli-in-the-gamma-frequency-is-associated-with-schizophrenia-symptoms
#4
Laura Kornmayer, Gregor Leicht, Christoph Mulert
BACKGROUND: Aberrant salience mainly is attributed to excessive dopaminergic processing in the ventral striatum (Kapur 2003). Also, early sensory processing of physical salience has been shown to be associated with positive trait schizotypy (Kornmayer et al. 2015). In the present study, this is assessed in patients with schizophrenia. METHODS: The early evoked visual gamma-band response at 40Hz (GBR) was assessed for a schizophrenia patient group (N = 22) and a matched healthy control group (N = 22) applying EEG time-frequency analysis...
November 15, 2016: World Journal of Biological Psychiatry
https://www.readbyqxmd.com/read/27834419/limitations-and-options-using-resorbable-versus-nonresorbable-membranes-for-successful-guided-bone-regeneration
#5
Nikolaos K Soldatos, Popi Stylianou, Vasiliki P Koidou, Nikola Angelov, Raymond Yukna, Georgios E Romanos
OBJECTIVE: Deficient bony ridges often complicate the implant treatment plan. Several treatment modalities are used to regenerate bone, including guided bone regeneration (GBR). The purpose of this study was to summarize the knowledge on different types of membranes available and currently used in GBR procedures in a staged approach or with simultaneous implant placement. The primary role of the membranes is to exclude epithelial and connective tissue cells from the wound area to be regenerated, and to create and maintain the space into which pluripotential and osteogenic cells are free to migrate...
November 10, 2016: Quintessence International
https://www.readbyqxmd.com/read/27809393/global-warming-will-disproportionately-affect-larger-adults-in-a-predatory-coral-reef-fish
#6
Vanessa Messmer, Morgan S Pratchett, Andrew S Hoey, Andrew J Tobin, Darren J Coker, Steven J Cooke, Timothy D Clark
Global warming is expected to reduce body sizes of ectothermic animals. Although the underlying mechanisms of size reductions remain poorly understood, effects appear stronger at latitudinal extremes (poles and tropics) and in aquatic rather than terrestrial systems. To shed light on this phenomenon, we examined the size-dependence of critical thermal maxima (CTmax) and aerobic metabolism in a commercially important tropical reef fish, the leopard coral grouper (Plectropomus leopardus) following acclimation to current-day (28...
November 3, 2016: Global Change Biology
https://www.readbyqxmd.com/read/27806103/degradation-of-herbicides-in-the-tropical-marine-environment-influence-of-light-and-sediment
#7
Philip Mercurio, Jochen F Mueller, Geoff Eaglesham, Jake O'Brien, Florita Flores, Andrew P Negri
Widespread contamination of nearshore marine systems, including the Great Barrier Reef (GBR) lagoon, with agricultural herbicides has long been recognised. The fate of these contaminants in the marine environment is poorly understood but the detection of photosystem II (PSII) herbicides in the GBR year-round suggests very slow degradation rates. Here, we evaluated the persistence of a range of commonly detected herbicides in marine water under field-relevant concentrations and conditions. Twelve-month degradation experiments were conducted in large open tanks, under different light scenarios and in the presence and absence of natural sediments...
2016: PloS One
https://www.readbyqxmd.com/read/27775206/an-improved-method-for-calculating-toxicity-based-pollutant-loads-part-2-application-to-contaminants-discharged-to-the-great-barrier-reef-queensland-australia
#8
Rachael A Smith, Michael St J Warne, Kerrie Mengersen, Ryan D R Turner
Pollutant loads are widely used to set pollution reduction targets and assess regulatory compliance for the protection of receiving waterbodies. However, when a pollutant load is comprised of a mixture of chemicals, reducing the overall load (mass) will not necessarily reduce the toxicity by a similar amount. This can be overcome by setting targets based on toxicity-based loads (toxic loads), where the load is modified according to the relative toxicity (expressed as toxic equivalency factors- TEFs) of each toxicant...
October 24, 2016: Integrated Environmental Assessment and Management
https://www.readbyqxmd.com/read/27744581/a-test-of-trophic-cascade-theory-fish-and-benthic-assemblages-across-a-predator-density-gradient-on-coral-reefs
#9
Jordan M Casey, Andrew H Baird, Simon J Brandl, Mia O Hoogenboom, Justin R Rizzari, Ashley J Frisch, Christopher E Mirbach, Sean R Connolly
Removal of predators is often hypothesized to alter community structure through trophic cascades. However, despite recent advances in our understanding of trophic cascades, evidence is often circumstantial on coral reefs because fishing pressure frequently co-varies with other anthropogenic effects, such as fishing for herbivorous fishes and changes in water quality due to pollution. Australia's outer Great Barrier Reef (GBR) has experienced fishing-induced declines of apex predators and mesopredators, but pollution and targeting of herbivorous fishes are minimal...
October 15, 2016: Oecologia
https://www.readbyqxmd.com/read/27743234/a-complex-of-cardicola-short-1953-digenea-aporocotylidae-species-infecting-the-milkfish-chanos-chanos-forssk%C3%A3-l-gonorynchiformes-with-descriptions-of-two-new-species
#10
Russell Q-Y Yong, Scott C Cutmore, Terrence L Miller, Nicholas Q-X Wee, Thomas H Cribb
Two new species of Cardicola Short, 1953 are described from the milkfish, Chanos chanos Forsskål (Gonorynchiformes: Chanidae), obtained from off Lizard Island on the northern Great Barrier Reef (GBR) and North Stradbroke Island in southeast Queensland. These are the first known blood flukes from this order of fishes. Cardicola suni n. sp. differs from all other Cardicola spp. by a combination of a large ovoid oral sucker surrounding a subterminal mouth, recurved tegumental spines up to 16 μm long, anterior caeca occupying 25...
November 2016: Systematic Parasitology
https://www.readbyqxmd.com/read/27716630/evaluation-of-3d-printed-pcl-plga-%C3%AE-tcp-versus-collagen-membranes-for-guided-bone-regeneration-in-a-beagle-implant-model
#11
J-Y Won, C-Y Park, J-H Bae, G Ahn, C Kim, D-H Lim, D-W Cho, W-S Yun, J-H Shim, J-B Huh
Here, we compared 3D-printed polycaprolactone/poly(lactic-co-glycolic acid)/β-tricalcium phosphate (PCL/PLGA/β-TCP) membranes with the widely used collagen membranes for guided bone regeneration (GBR) in beagle implant models. For mechanical property comparison in dry and wet conditions and cytocompatibility determination, we analyzed the rate and pattern of cell proliferation of seeded fibroblasts and preosteoblasts using the cell counting kit-8 assay and scanning electron microscopy. Osteogenic differentiation was verified using alizarin red S staining...
October 7, 2016: Biomedical Materials
https://www.readbyqxmd.com/read/27692486/excess-seawater-nutrients-enlarged-algal-symbiont-densities-and-bleaching-sensitive-reef-locations-2-a-regional-scale-predictive-model-for-the-great-barrier-reef-australia
#12
Scott A Wooldridge, Scott F Heron, Jon E Brodie, Terence J Done, Itsara Masiri, Saskia Hinrichs
A spatial risk assessment model is developed for the Great Barrier Reef (GBR, Australia) that helps identify reef locations at higher or lower risk of coral bleaching in summer heat-wave conditions. The model confirms the considerable benefit of discriminating nutrient-enriched areas that contain corals with enlarged (suboptimal) symbiont densities for the purpose of identifying bleaching-sensitive reef locations. The benefit of the new system-level understanding is showcased in terms of: (i) improving early-warning forecasts of summer bleaching risk, (ii) explaining historical bleaching patterns, (iii) testing the bleaching-resistant quality of the current marine protected area (MPA) network (iv) identifying routinely monitored coral health attributes, such as the tissue energy reserves and skeletal growth characteristics (viz...
September 28, 2016: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/27677817/predicting-range-shift-success-potential-for-tropical-marine-fishes-using-external-morphology
#13
Shannen M Smith, Rebecca J Fox, Jennifer M Donelson, Megan L Head, David J Booth
With global change accelerating the rate of species' range shifts, predicting which are most likely to establish viable populations in their new habitats is key to understanding how biological systems will respond. Annually, in Australia, tropical fish larvae from the Great Barrier Reef (GBR) are transported south via the East Australian Current (EAC), settling into temperate coastal habitats for the summer period, before experiencing near-100% mortality in winter. However, within 10 years, predicted winter ocean temperatures for the southeast coast of Australia will remain high enough for more of these so-called 'tropical vagrants' to survive over winter...
September 2016: Biology Letters
https://www.readbyqxmd.com/read/27641654/risk-analysis-of-the-governance-system-affecting-outcomes-in-the-great-barrier-reef
#14
Allan P Dale, Karen Vella, Robert L Pressey, Jon Brodie, Margaret Gooch, Ruth Potts, Rachel Eberhard
The state and trend of the Great Barrier Reef's (GBR's) ecological health remains problematic, influencing United Nations Educational, Scientific and Cultural Organization (UNESCO) statements regarding GBR governance. While UNESCO's concerns triggered separate strategic assessments by the Australian and Queensland governments, there has been no independent and integrated review of the key risks within the overall system of governance influencing GBR outcomes. As a case study of international significance, this paper applies Governance Systems Analysis (GSA), a novel analytical framework that identifies the governance themes, domains and subdomains most likely to influence environmental and socio-economic outcomes in complex natural systems...
December 1, 2016: Journal of Environmental Management
https://www.readbyqxmd.com/read/27635314/joint-estimation-of-crown-of-thorns-acanthaster-planci-densities-on-the-great-barrier-reef
#15
M Aaron MacNeil, Camille Mellin, Morgan S Pratchett, Jessica Hoey, Kenneth R N Anthony, Alistair J Cheal, Ian Miller, Hugh Sweatman, Zara L Cowan, Sascha Taylor, Steven Moon, Chris J Fonnesbeck
Crown-of-thorns starfish (CoTS; Acanthaster spp.) are an outbreaking pest among many Indo-Pacific coral reefs that cause substantial ecological and economic damage. Despite ongoing CoTS research, there remain critical gaps in observing CoTS populations and accurately estimating their numbers, greatly limiting understanding of the causes and sources of CoTS outbreaks. Here we address two of these gaps by (1) estimating the detectability of adult CoTS on typical underwater visual count (UVC) surveys using covariates and (2) inter-calibrating multiple data sources to estimate CoTS densities within the Cairns sector of the Great Barrier Reef (GBR)...
2016: PeerJ
https://www.readbyqxmd.com/read/27621692/effects-of-germinated-brown-rice-addition-on-the-flavor-and-functionality-of-yogurt
#16
Mi-Hye Kim, Sung-Il Ahn, Chan-Mook Lim, Jin-Woo Jhoo, Gur-Yoo Kim
This study aimed to investigate the functional and physicochemical properties of yogurt, supplemented with germinated brown rice (GBR) containing γ-aminobutyric acid (GABA), during storage. GBR was produced by soaking brown rice at 30℃, and saccharified germinated brown rice (SGBR) was produced by treating brown rice with α- and β-amylase for 1 h, at 80℃ and 60℃, respectively. Yogurt was manufactured using a commercial starter (YC-X11, CHR. Hansen, Denmark) at 37℃ for 12 h. The fatty acids and GABA contents were analyzed using GC and HPLC, respectively...
2016: Korean Journal for Food Science of Animal Resources
https://www.readbyqxmd.com/read/27616585/microarray-gene-expression-during-early-healing-of-gbr-treated-calvarial-critical-size-defects
#17
R Al-Kattan, M Retzepi, E Calciolari, N Donos
OBJECTIVES: To investigate the gene expression and molecular pathways implicated in the regulation of the osseous healing process following guided bone regeneration (GBR). MATERIAL AND METHODS: Six 6-month-old Wistar male rats were used. Standardized 5-mm critical size defects were created in the parietal bones of each animal and treated with an extracranial and intracranial ePTFE membrane, according to the GBR principle. Three animals were randomly sacrificed after 7 and 15 days of healing...
September 11, 2016: Clinical Oral Implants Research
https://www.readbyqxmd.com/read/27613193/collagen-based-barrier-membranes-for-periodontal-guided-bone-regeneration-applications
#18
Zeeshan Sheikh, Javairia Qureshi, Abdullah M Alshahrani, Heba Nassar, Yuichi Ikeda, Michael Glogauer, Bernhard Ganss
Certain cell populations within periodontal tissues possess the ability to induce regeneration, provided they have the opportunity to populate the wound or defect. Guided regeneration techniques have been investigated for regenerating periodontal tissues and such therapies usually utilize barrier membranes. Various natural and synthetic barrier membranes have been fabricated and tested to prevent epithelial and connective tissue cells from invading while allowing periodontal cells to selectively migrate into the defect...
September 9, 2016: Odontology
https://www.readbyqxmd.com/read/27610622/regulation-of-nociceptive-plasticity-threshold-and-darpp-32-phosphorylation-in-spinal-dorsal-horn-neurons-by-convergent-dopamine-and-glutamate-inputs
#19
Itsaso Buesa, Zigor Aira, Jon Jatsu Azkue
Dopamine can influence NMDA receptor function and regulate glutamate-triggered long-term changes in synaptic strength in several regions of the CNS. In spinal cord, regulation of the threshold of synaptic plasticity may determine the proneness to undergo sensitization and hyperresponsiveness to noxious input. In the current study, we increased endogenous dopamine levels in the dorsal horn by using re-uptake inhibitor GBR 12935. During the so-induced hyperdopaminergic transmission, conditioning low-frequency (1 Hz) stimulation (LFS) to the sciatic nerve induced long-term potentiation (LTP) of C-fiber-evoked potentials in dorsal horn neurons...
2016: PloS One
https://www.readbyqxmd.com/read/27564868/ocean-acidification-linking-science-to-management-solutions-using-the-great-barrier-reef-as-a-case-study
#20
REVIEW
Rebecca Albright, Kenneth R N Anthony, Mark Baird, Roger Beeden, Maria Byrne, Catherine Collier, Sophie Dove, Katharina Fabricius, Ove Hoegh-Guldberg, Ryan P Kelly, Janice Lough, Mathieu Mongin, Philip L Munday, Rachel J Pears, Bayden D Russell, Bronte Tilbrook, Eva Abal
Coral reefs are one of the most vulnerable ecosystems to ocean acidification. While our understanding of the potential impacts of ocean acidification on coral reef ecosystems is growing, gaps remain that limit our ability to translate scientific knowledge into management action. To guide solution-based research, we review the current knowledge of ocean acidification impacts on coral reefs alongside management needs and priorities. We use the world's largest continuous reef system, Australia's Great Barrier Reef (GBR), as a case study...
November 1, 2016: Journal of Environmental Management
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