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https://www.readbyqxmd.com/read/29904753/phosphoric-acid-containing-chlorhexidine-compromises-bonding-of-universal-adhesive
#1
Lucas Saldanha da Rosa, Andressa Cargnelutti Follak, Tathiane Larissa Lenzi, Rachel de Oliveira Rocha, Fabio Zovico Maxnuck Soares
PURPOSE: To examine the influence of phosphoric acid containing chlorhexidine on the dentin bond stability of a universal and a 2-step etch-and-rinse adhesive. MATERIALS AND METHODS: Eighty sound bovine incisors were randomly assigned to 8 groups (n = 10) according to: phosphoric acid (37% phosphoric acid [CTR] or 37% phosphoric acid with 2% chlorhexidine [CHX]); adhesive (Scotchbond Universal Adhesive [SBU]or Adper Single Bond 2 [SB2]); and water storage time (24 h and 6 months)...
June 14, 2018: Journal of Adhesive Dentistry
https://www.readbyqxmd.com/read/29899629/micro-shear-bond-strength-of-universal-adhesives-used-for-amalgam-repair-with-or-without-alloy-primer
#2
Hacer Balkaya, Sezer Demirbuga, Nazire Nurdan Çakir, Muhammed Karadas, Yahya Orcun Zorba
Aim: The aim of this study was to investigate the adhesive performance of three different universal adhesives to repair aged amalgam by composite resins with or without Alloy Primer. Materials and Methods: Sixty amalgam samples were prepared, aged, and randomly divided into 12 main groups according to adhesive procedures used. Composite buildups were placed on amalgam surfaces. After micro-shear bonding test, the fracture surfaces were examined under the scanning electron microscopy statistical analysis was performed using two-way analysis of variance and Tukey's post hoc tests...
May 2018: Journal of Conservative Dentistry: JCD
https://www.readbyqxmd.com/read/29899627/bonding-performance-of-universal-adhesives-on-composite-repairs-with-or-without-silane-application
#3
Nazire Nurdan Çakir, Sezer Demirbuga, Hacer Balkaya, Muhammet Karadaş
Aim: This study aims to investigate the adhesive performance of three different universal adhesives to repair aged composite restorations, with or without the application of silane. Materials and Methods: A hundred and twenty resin composite samples were prepared, aged and randomly divided into 6 main Groups (single bond universal [SBU], All-Bond Universal [ABU], Futurabond U, Clearfil Tri-S Bond, Single Bond 2, and Clearfil SE Bond) and 2 subgroups (with or without silane)...
May 2018: Journal of Conservative Dentistry: JCD
https://www.readbyqxmd.com/read/29898182/minimization-of-polymerization-shrinkage-effects-on-composite-resins-by-the-control-of-irradiance-during-the-photoactivation-process
#4
Gabriel Felipe Guimarães, Edilmar Marcelino, Ivana Cesarino, Fábio Bossoi Vicente, Carlos Roberto Grandini, Rafael Plana Simões
INTRODUCTION: High levels of shrinkage stress caused by volumetric variations during the activation process are one of the main problems in the practical application of composite resins. OBJECTIVE: The aim of this study is to reduce the shrinkage stress and minimize the effects caused by composite resin volumetric variation due to the photopolymerization. In this way, this work proposes a systematic study to determine the optimal dimming function to be applied to light curing processes...
June 11, 2018: Journal of Applied Oral Science: Revista FOB
https://www.readbyqxmd.com/read/29898031/effect-of-different-bonding-protocols-on-degree-of-monomer-conversion-and-bond-strength-between-orthodontic-brackets-and-enamel
#5
Lorena Marques Ferreira de Sena, Helga Adachi Medeiros Barbosa, Sergei Godeiro Fernandes Rabelo Caldas, Mutlu Ozcan, Rodrigo Othávio de Assunção E Souza
The objective of the present study was to evaluate the effect of different surface treatments and polymerization protocols on the bond strength of brackets to enamel, and the degree of conversion of the bonding agents. 120 bovine crowns were embedded in acrylic resin blocks and sanded. Next, the blocks were randomly assigned into 12 groups. Metal brackets were bonded to enamel according to the "surface treatment" factor (A: Phosphoric Acid; ATxt: Phosphoric Acid + Transbond XT Primer®; Tse: Transbond Plus Self Etching Primer®; and SBU: Scotchbond Universal®) and "polymerization" factor (R20: Radii-Cal®/20 seconds; V20: Valo Cordless®/20 seconds; and V3: Valo Cordless®/3 seconds)...
June 11, 2018: Brazilian Oral Research
https://www.readbyqxmd.com/read/29897458/increased-aif-1-mediated-tnf-%C3%AE-expression-during-implantation-phase-in-ivf-cycles-with-gnrh-antagonist-protocol
#6
Bufang Xu, Mingjuan Zhou, Jingwen Wang, Dan Zhang, Feng Guo, Chenchen Si, Peter C K Leung, Aijun Zhang
STUDY QUESTION: Is allograft inflammatory factor-1 (AIF-1), a cytokine associated with inflammation and allograft rejection, aberrantly elevated in in vitro fertilization (IVF) cycles with gonadotropin-releasing hormone (GnRH) antagonist protocol with potential effects on endometrial receptivity? SUMMARY ANSWER: Our findings indicated AIF-1 is increased in IVF cycles with GnRH antagonist protocol and mediates greater TNF-α expression during implantation phase, which may be unfavorable for embryo implantation...
June 12, 2018: Human Reproduction
https://www.readbyqxmd.com/read/29896309/a-smart-bilayered-scaffold-supporting-keratinocytes-and-muscle-cells-in-micro-nano-scale-for-urethral-reconstruction
#7
XiangGuo Lv, Chao Feng, YiDong Liu, XuFeng Peng, ShiYan Chen, DongDong Xiao, HuaPing Wang, Zhe Li, YueMin Xu, MuJun Lu
Rationale: In urethral tissue engineering, the currently available reconstructive procedures are insufficient due to a lack of appropriate scaffolds that would support the needs of various cell types. To address this problem, we developed a bilayer scaffold comprising a microporous network of silk fibroin (SF) and a nanoporous bacterial cellulose (BC) scaffold and evaluated its feasibility and potential for long-segment urethral regeneration in a dog model. Methods: The freeze-drying and self-assembling method was used to fabricate the bilayer scaffold by stationary cultivation G...
2018: Theranostics
https://www.readbyqxmd.com/read/29894409/effectiveness-of-interventions-for-preventing-occupational-irritant-hand-dermatitis-a-quantitative-systematic-review
#8
Zoi Papadatou, Hector Williams, Kay Cooper
OBJECTIVE: The aim of this review was to identify, appraise and synthesize the best available evidence on the effectiveness of moisturizers, barrier creams, protective gloves, skin protection education and complex interventions (a combination of two or more of the interventions listed here) in preventing occupational irritant hand dermatitis (OIHD) in wet workers, comparing each intervention to an alternative intervention or to usual care (workers' regular skin care regimen). INTRODUCTION: The most significant occupational skin problem potentially encountered in wet work occupations is occupational dermatitis...
June 2018: JBI Database of Systematic Reviews and Implementation Reports
https://www.readbyqxmd.com/read/29890684/dental-resin-cements-the-influence-of-water-sorption-on-contraction-stress-changes-and-hydroscopic-expansion
#9
Grzegorz Sokolowski, Agata Szczesio, Kinga Bociong, Karolina Kaluzinska, Barbara Lapinska, Jerzy Sokolowski, Monika Domarecka, Monika Lukomska-Szymanska
Resin matrix dental materials undergo contraction and expansion changes due to polymerization and water absorption. Both phenomena deform resin-dentin bonding and influence the stress state in restored tooth structure in two opposite directions. The study tested three composite resin cements (Cement-It, NX3, Variolink Esthetic DC), three adhesive resin cements (Estecem, Multilink Automix, Panavia 2.0), and seven self-adhesive resin cements (Breeze, Calibra Universal, MaxCem Elite Chroma, Panavia SA Cement Plus, RelyX U200, SmartCem 2, and SpeedCEM Plus)...
June 8, 2018: Materials
https://www.readbyqxmd.com/read/29889785/first-results-with-a-new-pressure-free-adhesive-bone-conduction-hearing-aid
#10
Valerie Dahm, Wolf-Dieter Baumgartner, Rudolfs Liepins, Christoph Arnoldner, Dominik Riss
OBJECTIVES: The aim of this study was to evaluate the hearing benefit, advantages, and disadvantages in a series of patients using a new, nonimplantable, pressure-free, adhesive bone conduction hearing aid. METHODS: Twelve patients were included in the study at the ear, nose, and throat department of the Medical University of Vienna. All patients suffered from conductive hearing loss for at least 3 months. A sound field audiometry, Freiburg monosyllables word test and Oldenburg sentence test were carried out...
July 2018: Otology & Neurotology
https://www.readbyqxmd.com/read/29882442/incidence-and-sites-of-pelvic-adhesions-in-women-with-post-caesarean-infertility
#11
Ayman Shehata Dawood, Adel Elshahat Elgergawy
This cross-sectional study was designed to evaluate the incidences and sites of pelvic adhesions in women with post-caesarean unexplained infertility. This study was conducted at the Tanta University Hospitals in the period from August 1 2015 to July 31 2016. The enrolled patients were assessed by a diagnostic laparoscopy for the presence and sites of abdominal and pelvic adhesions. Pelvic adhesions were found in 98 cases (73.13%) and the remaining 36 cases (26.87%) were free of adhesions. Adhesions were tubal in 55...
June 8, 2018: Journal of Obstetrics and Gynaecology: the Journal of the Institute of Obstetrics and Gynaecology
https://www.readbyqxmd.com/read/29880388/epo-derivative-ara290-attenuates-early-renal-allograft-injury-in-rats-by-targeting-nf-%C3%AE%C2%BAb-pathway
#12
H Zhang, S Gao, L Yan, G Zhu, Q Zhu, Y Gu, F Shao
BACKGROUND: The goal of this study was to analyze the protective role of ARA290 in early renal allograft injury by using a rat model of renal allograft. METHODS: Lewis rats were divided into 3 groups: sham, University of Wisconsin solution (UW), and ARA290. A rat model of renal allograft was established by anastomosis using a titanium ring pin stapler. The kidneys were removed 24 hours after transplantation to accomplish the following: (1) examine the protective effect of ARA290 on renal morphology and function; (2) investigate the underlying mechanism by determining the binding affinity of nuclear factor-κB (NF-κB) to DNA by using an electrophoretic mobility shift assay; (3) observe the effect of ARA290 on macrophage infiltration using immunohistochemistry; and (4) detect messenger RNA (mRNA) expression of inflammatory mediators by using reverse transcriptase polymerase chain reaction...
June 2018: Transplantation Proceedings
https://www.readbyqxmd.com/read/29879784/surgical-outcomes-of-pediatric-patients-with-asymptomatic-tethered-cord-syndrome
#13
Toshitaka Seki, Kazutoshi Hida, Shunsuke Yano, Kiyohiro Houkin
STUDY DESIGN: A retrospective cohort study. PURPOSE: To examine the validity of prophylactic surgery for children with tethered cord syndrome (TCS). OVERVIEW OF LITERATURE: Prophylactic surgery for pediatric patients with TCS remains controversial. METHODS: We retrospectively analyzed the surgical outcomes of 14 children (nine boys and five girls) with asymptomatic TCS who were surgically treated at Hokkaido University Hospital between 1989 and 2015...
June 2018: Asian Spine Journal
https://www.readbyqxmd.com/read/29875575/-in-vitro-evaluation-of-shear-bond-strength-of-orthodontic-brackets-bonded-with-different-adhesives
#14
Junaid Ahmed Shaik, Rajesh Kumar Reddy, K Bhagyalakshmi, Mithun J Shah, O Madhavi, S Venkat Ramesh
Background: There is necessary of dry operating field for bonding of orthodontic brackets. The presence of moisture can alter the bond strength. Hence, the aim of the present study was to evaluate the shear bond strength of orthodontic brackets with different adhesives. Materials and Methods: In this in vitro study, a total of 100 orthodontically extracted premolars with sound crown structure were divided into 4 equal groups of different primers. Bonding on the buccal surface of all teeth was done after acid etching with upper premolar brackets using different primers followed by light curing...
April 2018: Contemporary Clinical Dentistry
https://www.readbyqxmd.com/read/29874619/coherent-timescales-and-mechanical-structure-of-multicellular-aggregates
#15
Miao Yu, Aria Mahtabfar, Paul Beelen, Yasir Demiryurek, David I Shreiber, Jeffrey D Zahn, Ramsey A Foty, Liping Liu, Hao Lin
Multicellular aggregates are an excellent model system to explore the role of tissue biomechanics in specifying multicellular reorganization during embryonic developments and malignant invasion. Tissue-like spheroids, when subjected to a compressive force, are known to exhibit liquid-like behaviors at long timescales (hours), largely because of cell rearrangements that serve to effectively dissipate the applied stress. At short timescales (seconds to minutes), before cell rearrangement, the mechanical behavior is strikingly different...
June 5, 2018: Biophysical Journal
https://www.readbyqxmd.com/read/29866407/effect-of-intracoronal-depth-of-teeth-restored-with-endocrowns-on-fracture-resistance-in-vitro-and-3-dimensional-finite-element-analysis
#16
Nereu Roque Dartora, Michele Bertoluzi de Conto Ferreira, Izabela Cristina Maurício Moris, Elisabeth Helena Brazão, Aloísio Oro Spazin, Manoel Damião Sousa-Neto, Yara Terezinha Silva-Sousa, Erica Alves Gomes
INTRODUCTION: Endodontically treated teeth have an increased risk of biomechanical failure because of significant loss of tooth structure. The biomechanical behavior of endodontically treated teeth restored was evaluated using different extensions of endocrowns inside the pulp chamber by in vitro and 3-dimensional finite element analysis (FEA). METHODS: Thirty mandibular human molars were endodontically treated. Standardized endocrown preparations were performed, and the teeth were randomly divided into 3 groups (n = 10) according to different endocrown extensions inside the pulp chamber: G-5 mm, a 5-mm extension; G-3 mm, a 3-mm extension; and G-1 mm, a 1-mm extension...
June 1, 2018: Journal of Endodontics
https://www.readbyqxmd.com/read/29862039/fabrication-and-optimization-of-nanodiamonds-composited-poly-%C3%AE%C2%B5-caprolactone-fibrous-matrices-for-potential-regeneration-of-hard-tissues
#17
Guk Young Ahn, Tae-Kyung Ryu, Yu Ri Choi, Ju Ri Park, Min Jeong Lee, Sung-Wook Choi
Background: Electrospun fibrous matrices are of great importance for tissue engineering and drug delivery device. However, relatively low mechanical strength of the fibrous matrix is one of the major disadvantages. NDs with a positive charge were selected to enhance the mechanical property of a composited fibrous matrix by inducing the intermolecular interaction between NDs and polymer chain. We prepared ND-composited poly (ε-caprolactone) (PCL) fibrous matrices by electrospinning and evaluated their performance in terms of mechanical strength and cell behaviors...
2018: Biomaterials Research
https://www.readbyqxmd.com/read/29852512/predictors-of-knee-arthrofibrosis-and-outcomes-after-arthroscopic-lysis-of-adhesions-following-ligamentous-reconstruction-a-retrospective-case-control-study-with-over-two-years-average-follow-up
#18
Blake M Bodendorfer, Laura E Keeling, Evan M Michaelson, Henry T Shu, Nicholas A Apseloff, James D Spratt, Patrick S Malone, Evan H Argintar
Arthrofibrosis can be a devastating complication after ligamentous knee reconstruction. Beyond early range of motion (ROM), manipulation under anesthesia (MUA) and arthroscopic lysis of adhesions (LOAs) are the most frequently employed interventions for the condition. There is a paucity of data regarding predictive factors of arthrofibrosis requiring MUA and LOA, and even less data regarding changes in validated patient-reported outcome measures following the procedure. A retrospective case-control study was performed at an academic, urban Level I trauma center of patients that developed arthrofibrosis requiring MUA and LOA following ligamentous reconstruction...
May 31, 2018: Journal of Knee Surgery
https://www.readbyqxmd.com/read/29850511/the-effect-of-sncl-2-amf-pretreatment-on-short-and-long-term-bond-strength-to-eroded-dentin
#19
Katrin Zumstein, Anne Peutzfeldt, Adrian Lussi, Simon Flury
This study investigated the effect of SnCl2 /AmF pretreatment on short- and long-term bond strength of resin composite to eroded dentin mediated by two self-etch, MDP-containing adhesive systems. 184 dentin specimens were produced from extracted human molars. Half the specimens ( n = 92) were artificially eroded, and half were left untreated. For both substrates, half the specimens were pretreated with SnCl2 /AmF, and half were left untreated. The specimens were treated with Clearfil SE Bond or Scotchbond Universal prior to application of resin composite...
2018: BioMed Research International
https://www.readbyqxmd.com/read/29849963/effect-of-laser-heat-treatment-on-pull-out-bond-strength-of-fiber-posts-treated-with-different-silanes
#20
Fereshteh Shafiei, Maryam Saadat, Zahra Jowkar
Background: This study evaluated the effect of three different silanes and post-silanization treatments on the retentive strength of fiber posts luted with an etch-and-rinse resin cement. Material and Methods: One hundred intact maxillary central incisors were randomly divided into 10 groups after endodontic treatment and post space preparation (n=10). The fiber posts were etched using 24% hydrogen peroxide. Posts of the control group did not receive silane. In nine experimental groups, each of the three silanes used, Scotchbond Universal adhesive, Bis-Silane and Porcelain Primer, was subjected to three treatments: air-drying at 25°C, warm air-drying and CO2 laser heat treatment...
May 2018: Journal of Clinical and Experimental Dentistry
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