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https://www.readbyqxmd.com/read/29208783/clinical-time-required-and-internal-adaptation-in-cavities-restored-with-bulk-fill-composites
#1
Marcos Gabriel Vianna-de-Pinho, Guilherme Ferreira Rego, Marina Lermenn Vidal, Roberta Caroline Bruschi Alonso, Luis Felipe Jochims Schneider, Larissa Maria Cavalcante
AIM: The aim of this study was to compare the restorative time required and the internal adaptation after thermomechanical aging of class I restorations using either the conventional incremental technique or bulk-fill technique. MATERIALS AND METHODS: Cavities (Class I) were prepared on the occlusal surface of human third molars. 40 teeth were divided into four experimental groups according to the restorative technique (n = 10): G1 = 3 mm increment of Surefill SDR Flow + 1 mm Filtek P60; G2 = 3 mm increment of Filtek Bulk-Fill + 1 mm Filtek P60; G3 = Filtek P60 inserted with incremental technique; G4 = 3 mm increment of Filtek Z350 Flow XT + 1 mm increment of Filtek P60...
December 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/29205770/effect-of-tooth-brushing-on-gloss-retention-and-surface-roughness-of-five-bulk-fill-resin-composites
#2
Catherine O'Neill, Laurent Kreplak, Frederick A Rueggeberg, Daniel Labrie, Carlos Alberto Kenji Shimokawa, Richard Bengt Price
OBJECTIVES: To determine the effects of tooth brushing on five bulk-fill resin based composites (RBCs). METHOD: Ten samples of Filtek Supreme Enamel (control), Filtek One Bulk Fill, Tetric EvoCeram Bulk Fill, SonicFill 2, SDR flow+, and Admira Fusion X-tra were light cured for 20 seconds using the Valo Grand curing light. After 24 hours storage in air at 37°C, specimens were brushed in a random order using Colgate OpticWhite dentifrice and a soft toothbrush. Surface gloss was measured prior to brushing, after 5,000, 10,000 and 15,000 back and forth brushing cycles...
December 5, 2017: Journal of Esthetic and Restorative Dentistry
https://www.readbyqxmd.com/read/29203487/role-of-smeu1vwu2x-operon-in-the-alleviation-of-oxidative-stresses-and-the-occurrence-of-sulfamethoxazole-trimethoprim-resistant-mutants-in-stenotrophomonas-maltophilia
#3
Chao-Jung Wu, Tsu-Ting Chiu, Yi-Tsung Lin, Yi-Wei Huang, Li-Hua Li, Tsuey-Ching Yang
Overexpression of resistance-nodulation-division (RND)-type efflux pumps is an important mechanism for bacteria to combat antimicrobials. RND efflux pumps are also critical for bacterial physiology such as oxidative stress tolerance. Stenotrophomonas maltophilia, a multi-drug resistant opportunistic pathogen, harbors eight RND-type efflux pump operons. Of them, smeU1VWU2X operon is unique for its possession of two additional genes, smeU1 and smeU2, which encode proteins of short-chain dehydrogenase/reductase (SDR) family...
December 4, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/29202408/synthesis-and-antimycobacterial-activity-of-triterpeni%C3%A2-a-ring-azepanes
#4
Natalya I Medvedeva, Oxana B Kazakova, Tatyana V Lopatina, Irina E Smirnova, Gul'nara V Giniyatullina, Irina P Baikova, Vladimir E Kataev
A series of A-ring azepanones and azepanes derived from betulonic, oleanonic and ursonic acids was synthesized and evaluated for their in vitro antimycobacterial activities against M. tuberculosis (MTB) H37Rv and SDR-TB in the National Institute of Allergy and Infectious Diseases. Triterpenic A-azepano-28-hydroxy-derivatives were synthesized by the reduction with LiAlH4 of triterpenic azepanones available from the Beckmann rearrangement of the corresponding C3-oximes. Modification of azepanes at NH-group and atoms С12, C20, C28 and C29 of triterpenic core led to the derivatives with oxo, epoxy, aminopropyl, oximino and acyl substituents...
November 21, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29183673/effect-of-tribochemical-treatments-and-silane-reactivity-on-resin-bonding-to-zirconia
#5
Raphael Pilo, Maria Dimitriadi, Anna Palaghia, George Eliades
OBJECTIVE: The aim of the study was to assess the roughness, structure and bond strength with zirconia of four grit-blasting treatments combined with three silane types, the reactivity of which was evaluated, as well. METHODS: The grit-blasted treatments performed on zirconia (Lava) were alumina (ALU), CoJet (COJ), SilJet (SLJ) and SilJet Plus (SJP, with silica-encapsulated silane). The other two silanes selected were the S-Bond (SB, prehydrolyzed) and Clearfil Ceramic Primer Plus (CP, prehydrolyzed with 10-MDP)...
November 25, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/29179009/osteoblastic-cell-behaviour-on-modified-titanium-surfaces
#6
Magdalena Lukaszewska-Kuska, Przemysław Wirstlein, Radomir Majchrowski, Barbara Dorocka-Bobkowska
INTRODUCTION: The surfaces of endoosseous dental implants have been subjected to numerous modifications in order to create a surface which can provide rapid bone healing and fast implant loading. Each modification has involved changes to the chemical composition and topography of the surfaces which have resulted in various biological reactions to the implanted material. AIM: The aim of this study was to evaluate the surface topography and chemistry of various modified titanium surfaces: (1) machined surface (MA), (2) alumina-blasted (Al2O3), (3) alumina-blasted and acid-etched (Al2O3 DE), (4) hydroxyapatite/tricalcium phosphate grit-blasted (HA/TCP) and (5) hydroxyapatite/tricalcium phosphate grit-blasted and acid-etched (HA/TCP DE) and to analyse the effects of surface roughness, and chemical composition on human osteoblast vitality, differentiation, morphology and orientation...
November 22, 2017: Micron: the International Research and Review Journal for Microscopy
https://www.readbyqxmd.com/read/29178709/determination-of-polymerization-shrinkage-of-different-composites-using-a-photoelastic-method
#7
Inga Rullman, Michael Patyna, Bram Janssen, Brita Willershausen
PURPOSE: To investigate the polymerization shrinkage stress of different low viscous bulk composites (SDR, Venus Bulk Fill, X-tra Base, Filtek Bulk Fill) in comparison to a conventional flowable composite (Filtek Supreme XTE Flow) and to high viscous bulk and conventional composites (Filtek Supreme XTE, GrandioSO, Tetric EvoCeram, Tetric EvoCeram BulkFill, Venus Diamond, Venus Pearl), as well as to an experimental composite (Ormocer) and a sonic-activated bulk fill composite (Sonicfill), by means of photoelastic investigation...
February 2017: American Journal of Dentistry
https://www.readbyqxmd.com/read/29176302/influence-of-increment-thickness-on-radiant-energy-and-microhardness-of-bulkfill-resin-composites
#8
Gamze Karacolak, L Sebnem Turkun, Hayal Boyacioglu, Jack L Ferracane
Determining the energy transferred at the bottom of eleven bulk-fill resin composites, comparing top and bottom microhardness's and evaluating the correlation between microhardness and radiant energy were aimed. Samples were placed over the bottom sensor of a visible light transmission spectrophotometer and polymerized for 20 s. The bottom and top Knoop microhardness were measured. Paired t-test and correlation analysis were used for statistics (p≤0.05). In all groups, the bottom radiant energy decreased significantly with increasing thickness...
November 23, 2017: Dental Materials Journal
https://www.readbyqxmd.com/read/29171163/surface-changes-of-various-bulk-fill-resin-based-composites-after-exposure-to-different-food-simulating-liquid-and-beverages
#9
Saijai Tanthanuch, Boonlert Kukiattrakoon, Kasidit Eiam-O-Pas, Kan Pokawattana, Nicha Pamanee, Wichachon Thongkamkaew, Asok Kochatung
OBJECTIVE: To evaluate surface roughness, hardness, and morphology changes of various bulk-fill resin composites eroded by different food-simulating liquids and beverages. MATERIALS AND METHODS: One hundred and thirteen specimens were fabricated in polytetrafluoroethylene cylindrical mold (10 mm in diameter and 4 mm in thickness). Before immersion, baseline data of roughness, Vicker's microhardness were recorded and surface characteristics were examined using scanning electron microscopy (SEM)...
November 24, 2017: Journal of Esthetic and Restorative Dentistry
https://www.readbyqxmd.com/read/29162006/sufficient-dimension-reduction-via-direct-estimation-of-the-gradients-of-logarithmic-conditional-densities
#10
Hiroaki Sasaki, Voot Tangkaratt, Gang Niu, Masashi Sugiyama
Sufficient dimension reduction (SDR) is aimed at obtaining the low-rank projection matrix in the input space such that information about output data is maximally preserved. Among various approaches to SDR, a promising method is based on the eigendecomposition of the outer product of the gradient of the conditional density of output given input. In this letter, we propose a novel estimator of the gradient of the logarithmic conditional density that directly fits a linear-in-parameter model to the true gradient under the squared loss...
November 21, 2017: Neural Computation
https://www.readbyqxmd.com/read/29151266/crystal-structure-and-catalytic-characterization-of-the-dehydrogenase-reductase-sdr-family-member-4-dhrs4-from-caenorhabditis-elegans
#11
Michael Kisiela, Annette Faust, Bettina Ebert, Edmund Maser, Axel J Scheidig
The human dehydrogenase/reductase SDR family member 4 (DHRS4) is a tetrameric protein that is involved in the metabolism of several aromatic carbonyl compounds, steroids and bile acids. The only invertebrate DHRS4 that has been characterized to date is that from the model organism Caenorhabditis elegans. We have previously cloned and initially characterized this protein that was recently annotated as DHRS4_CAEEL in the UniProtKB database. Crystallization and X-ray diffraction studies of the full-length DHRS4_CAEEL protein in complex with diacetyl revealed its tetrameric structure and showed that two subunits are connected via an intermolecular disulfide bridge that is formed by N-terminal cysteine residues (Cys5) of each protein chain, which increases the enzymatic activity...
November 19, 2017: FEBS Journal
https://www.readbyqxmd.com/read/29148914/marginal-gap-formation-in-approximal-bulk-fill-resin-composite-restorations-after-artificial-ageing
#12
A Peutzfeldt, S Mühlebach, A Lussi, S Flury
The aim of this in vitro study was to investigate the marginal gap formation of a packable "regular" resin composite (Filtek Supreme XTE [3M ESPE]) and two flowable "bulk fill" resin composites (Filtek Bulk Fill [3M ESPE] and SDR [DENTSPLY DeTrey]) along the approximal margins of Class II restorations. In each of 39 extracted human molars (n=13 per resin composite), mesial and distal Class II cavities were prepared, placing the gingival margins below the cemento-enamel junction. The cavities were restored with the adhesive system OptiBond FL (Kerr) and one of the three resin composites...
November 17, 2017: Operative Dentistry
https://www.readbyqxmd.com/read/29146967/splenic-glucocorticoid-resistance-following-psychosocial-stress-requires-physical-injury
#13
Sandra Foertsch, Andrea M Füchsl, Sandra D Faller, Hannah Hölzer, Dominik Langgartner, Joanna Messmann, Gudrun Strauß, Stefan O Reber
Mice exposed to chronic subordinate colony housing (CSC) stress show glucocorticoid (GC) resistance of in vitro lipopolysaccharide (LPS)-stimulated splenocytes, increased anxiety and colitis. Similar effects were reported in wounded mice exposed to social disruption (SDR). Here we show that CSC exposure induced GC resistance in isolated and in vitro LPS-stimulated, but not unstimulated, splenocytes, and these effects were absent when CD11b(+) splenocytes were depleted. Moreover, re-active coping behaviour during CSC correlated with the attacks and bites received by the resident, which in turn highly correlated with the dimension of splenic GC resistance, as with basal and LPS-induced in vitro splenocyte viability...
November 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29141632/declining-amenable-mortality-a-reflection-of-health-care-systems
#14
Maria Michela Gianino, Jacopo Lenzi, Maria Pia Fantini, Walter Ricciardi, Gianfranco Damiani
BACKGROUND: Some studies have analyzed the association of health care systems variables, such as health service resources or expenditures, with amenable mortality, but the association of types of health care systems with the decline of amenable mortality has yet to be studied. The present study examines whether specific health care system types are associated with different time trend declines in amenable mortality from 2000 to 2014 in 22 European OECD countries. METHODS: A time trend analysis was performed...
November 15, 2017: BMC Health Services Research
https://www.readbyqxmd.com/read/29127795/an-investigation-of-the-leaf-retention-capacity-efficiency-and-mechanism-for-atmospheric-particulate-matter-of-five-greening-tree-species-in-beijing-china
#15
Jinqiang Liu, Zhiguo Cao, Songyan Zou, Huanhuan Liu, Xiao Hai, Shihua Wang, Jie Duan, Benye Xi, Guangxuan Yan, Shaowei Zhang, Zhongkui Jia
Urban trees have the potential to reduce air pollution, but the retention capacity and efficiency of different tree species for atmospheric particulate matter (PM) accumulation and the underlying mechanism hasn't been well understood. To select tree species with high air purification abilities, the supplementing ultrasonic cleaning (UC) procedure was first introduced into the conventional leaf cleaning methods [single water cleaning (WC) or plus brush cleaning (BC)] for eluting the leaf-retained PM. Further updates to the methodology were applied to investigate the retention capacity, efficiency, and mechanism for PM of five typical greening tree species in Beijing, China...
November 8, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29122688/lower-limb-lengths-and-angles-in-children-older-than-six-years-reliability-and-reference-values-by-eos-%C3%A2-stereoradiography
#16
V Rampal, P-Y Rohan, A Assi, I Ghanem, O Rosello, A-L Simon, E Gaumetou, V Merzoug, W Skalli, P Wicart
BACKGROUND: Lower-limb alignment in children is classically assessed clinically or based on conventional radiography, which is associated with projection bias. Low-dose biplanar radiography was described recently as an alternative to conventional imaging. The primary objective of this study was to assess the reliability of length and angle values inferred from 3D reconstructions in children seen in everyday practice. The secondary objective was to obtain reference values for goniometry parameters in children...
November 6, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/29117652/microhardness-of-bulk-fill-composite-materials
#17
Katarina Kelić, Sanja Matić, Danijela Marović, Eva Klarić, Zrinka Tarle
The aim of the study was to determine microhardness of high- and low-viscosity bulk-fill composite resins and compare it with conventional composite materials. Four materials of high-viscosity were tested, including three bulk-fills: QuiXfi l (QF), x-tra fi l (XTF) and Tetric EvoCeram Bulk Fill (TEBCF), while nanohybrid composite GrandioSO (GSO) served as control. The other four were low-viscosity composites, three bulk-fill materials: Smart Dentin Replacement (SDR), Venus Bulk Fill (VBF) and x-tra base (XB), and conventional control material X-Flow (XF)...
December 2016: Acta Clinica Croatica
https://www.readbyqxmd.com/read/29116382/selective-dorsal-rhizotomy-for-the-treatment-of-severe-spastic-cerebral-palsy-efficacy-and-therapeutic-durability-in-gmfcs-grade-iv-and-v-children
#18
Daniel D'Aquino, Ahmad A Moussa, Amr Ammar, Harshal Ingale, Michael Vloeberghs
BACKGROUND: Selective dorsal rhizotomy (SDR) has been established as an effective surgical treatment for spastic diplegia. The applicability of SDR to the full spectrum of spastic cerebral palsy and the durability of its therapeutic effects remain under investigation. There are currently limited data in the literature regarding efficacy and outcomes following SDR in Gross Motor Function Classification System (GMFCS) IV and V patients. Intrathecal baclofen has traditionally been the surgical treatment of choice for these patients...
November 7, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/29114609/dose-escalation-with-an-imrt-technique-in-15-to-28-fractions-is-better-tolerated-than-standard-doses-of-3dcrt-for-lapc
#19
Lauren E Colbert, Shalini Moningi, Awalpreet Chadha, Ahmed Amer, Yeonju Lee, Robert A Wolff, Gauri Varadhachary, Jason Fleming, Matthew Katz, Prajnan Das, Sunil Krishnan, Eugene J Koay, Peter Park, Christopher H Crane, Cullen M Taniguchi
Purpose: To review acute and late toxicities after chemoradiation for locally advanced pancreatic ductal adenocarcinoma in patients who were treated with escalated dose radiation (EDR). Methods and materials: Maximum Common Terminology Criteria for Adverse Events Version 4.0 acute toxicities (AT) during radiation and within 60 days after radiation were recorded for both acute gastrointestinal toxicity and overall toxicity (OT). Late toxicities were also recorded...
July 2017: Advances in Radiation Oncology
https://www.readbyqxmd.com/read/29101607/development-of-a-high-risk-pancreatic-screening-clinic-using-3-0%C3%A2-t-mri
#20
Chad A Barnes, Elizabeth Krzywda, Shannon Lahiff, Dena McDowell, Kathleen K Christians, Paul Knechtges, Parag Tolat, Mark Hohenwalter, Kulwinder Dua, Abdul H Khan, Douglas B Evans, Jennifer Geurts, Susan Tsai
Selective screening for pancreatic cancer (PC) has been proposed. We describe the establishment of a comprehensive multidisciplinary screening program using 3.0 T MRI. Criteria for screening included the presence of PC in: ≥ 2 first degree relatives (FDR), 1 FDR and 1 s degree relative (SDR), ≥ 3 any degree relatives (ADR), or any known hereditary cancer syndrome with increased PC risk. Imaging with 3.0 T MRI was performed routinely and endoscopic ultrasound was used selectively. Screening was completed in 75 patients (pts)...
November 3, 2017: Familial Cancer
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