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https://www.readbyqxmd.com/read/28081572/exposed-dentin-influence-of-cleaning-procedures-and-simulated-pulpal-pressure-on-bond-strength-of-a-universal-adhesive-system
#1
Simon Flury, Anne Peutzfeldt, Patrick R Schmidlin, Adrian Lussi
PURPOSE: To compare various pre-treatments serving as cleaning procedures of dentin on the bond strength of resin composite promoted by a universal adhesive system applied either in the absence or presence of simulated pulpal pressure. MATERIALS AND METHODS: Prior to application of the adhesive system (Scotchbond Universal) and resin composite (Filtek Z250), ground dentin surfaces were given one of five pre-treatments either without or with simulated pulpal pressure: 1) no pre-treatment, adhesive system in "self-etch" mode, 2) phosphoric acid etching, adhesive system in "total-etch" mode, 3) polishing with pumice on prophylaxis cup, 4) air abrasion with AIR-FLOW PLUS powder, 5) air abrasion with AIR-FLOW PERIO powder; n = 20/group of pre-treatment...
2017: PloS One
https://www.readbyqxmd.com/read/28077291/in-vitro-dentin-barrier-cytotoxicity-testing-of-some-dental-restorative-materials
#2
R D Jiang, H Lin, G Zheng, X M Zhang, Q Du, M Yang
OBJECTIVES: To investigate the cytotoxicity of four dental restorative materials in three-dimensional (3D) L929 cell cultures using a dentin barrier test. METHODS: The cytotoxicities of light-cured glass ionomer cement (Vitrebond), total-etching adhesive (GLUMA Bond5), and two self-etching adhesives (GLUMA Self Etch and Single Bond Universal) were evaluated. The permeabilities of human dentin disks with thicknesses of 300, 500, and 1000μm were standardized using a hydraulic device...
January 8, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28072564/clinical-factors-associated-with-the-diagnosis-of-granulomatosis-with-polyangiitis
#3
Erdem Eren, Toygar Kalkan, Seçil Arslanoğlu, Mustafa Özmen, Kazım Önal, Emine Figen Tarhan, Servet Akar
Objective To determine the predictive value of nasal endoscopic findings and symptoms in the diagnosis of granulomatosis with polyangiitis (GPA). Study Design A cross-sectional study. Setting A tertiary university hospital. Subjects and Methods A total of 116 adults were enrolled in the study: 19 patients with GPA, 29 patients with other rheumatic diseases, and 68 healthy volunteers. All patients were examined with a flexible endoscope, and nasal endoscopic images were recorded and evaluated blindly. The medical history of each patient was taken by a physician blinded to the patient's diagnosis...
January 1, 2017: Otolaryngology—Head and Neck Surgery
https://www.readbyqxmd.com/read/28070702/effects-of-tributylborane-activated-adhesive-and-two-silane-agents-on-bonding-computer-aided-design-and-manufacturing-cad-cam-resin-composite
#4
Ayano Shinohara, Yohsuke Taira, Takashi Sawase
The present study was conducted to evaluate the effects of an experimental adhesive agent [methyl methacrylate-tributylborane liquid (MT)] and two adhesive agents containing silane on the bonding between a resin composite block of a computer-aided design and manufacturing (CAD/CAM) system and a light-curing resin composite veneering material. The surfaces of CAD/CAM resin composite specimens were ground with silicon-carbide paper, treated with phosphoric acid, and then primed with either one of the two silane agents [Scotchbond Universal Adhesive (SC) and GC Ceramic Primer II (GC)], no adhesive control (Cont), or one of three combinations (MT/SC, MT/GC, and MT/Cont)...
January 9, 2017: Odontology
https://www.readbyqxmd.com/read/28057052/an-evaluation-of-the-evolution-of-the-gene-structure-of-dystroglycan
#5
Andrea Brancaccio, Josephine C Adams
BACKGROUND: Dystroglycan (DG) is an adhesion receptor complex composed of two non-covalently associated subunits, transcribed from a single gene. The extracellular α-DG is highly and heterogeneously glycosylated and binds with high affinity to laminins, and the transmembrane β-DG binds intracellular dystrophin. Multiple cellular functions have been proposed for DG, notwithstanding that its role in skeletal muscle appears central as demonstrated by both primary and secondary severe muscular dystrophic phenotypes collectively known as dystroglycanopathies...
January 3, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28050507/shear-bond-strength-of-ceramic-brackets-with-different-base-designs-comparative-in-vitro-study
#6
Mohd Younus Ansari, Deepak K Agarwal, Ankur Gupta, Preeti Bhattacharya, Juhi Ansar, Ravi Bhandari
INTRODUCTION: Knowledge about the Shear Bond Strength (SBS) of ceramic brackets with different base design is essential as it affects bond strength to enamel. AIM: The aim of the present study was to evaluate and compare the effect of base designs of different ceramic brackets on SBS, and to determine the fracture site after debonding. MATERIALS AND METHODS: Four groups of ceramic brackets and one group of metal brackets with different base designs were used...
November 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28044280/the-use-of-gamma-radiation-for-the-treatment-of-cultural-heritage-in-the-argentine-national-atomic-energy-commission-past-present-and-future
#7
REVIEW
Ana Maria Del Carmen Calvo, Andrea Docters, María Virginia Miranda, Mario Carlos Nazareno Saparrat
The use of gamma radiation for treating biodeteriorated cultural heritage on paper has been studied at the Comisión Nacional de Energía Atómica-CNEA (Argentina) since 2001. In order to preserve books, publications, and documents that have been attacked by insects or fungi, gamma radiation techniques have been used at CNEA. The activities include basic research as well as their applications in infected documents and papers currently used in libraries and archives. New papers were subjected to accelerated ageing in order to evaluate the effects of gamma radiation on their physical and mechanical properties...
February 2017: Topics in Current Chemistry (Journal)
https://www.readbyqxmd.com/read/28042271/knowledge-and-attitudes-of-dental-interns-toward-denture-adhesives-in-king-saud-university-riyadh-saudi-arabia
#8
Sara Mohammad Al Taweel, Huda Ahmed Al Shehri
OBJECTIVE: The objective of this study was to evaluate the knowledge and attitudes of dental interns at King Saud University College of Dentistry (KSUCD) regarding denture adhesives (DAs). MATERIALS AND METHODS: Surveys were distributed to dental interns at KSUCD (n = 100). Cross-tabulations with the Pearson-™s Chi-square test were used to compare variables using the Statistical Package for Social Sciences (P ≤ 0.05). RESULTS: Approximately, 85...
October 2016: European Journal of Dentistry
https://www.readbyqxmd.com/read/28034598/carbapenem-resistant-pseudomonas-aeruginosa-association-with-virulence-genes-and-biofilm-formation
#9
Iara Rossi Gonçalves, Raquel Cristina Cavalcanti Dantas, Melina Lorraine Ferreira, Deivid William da Fonseca Batistão, Paulo Pinto Gontijo-Filho, Rosineide Marques Ribas
Pseudomonas aeruginosa is an opportunistic pathogen that causes frequently nosocomial infections, currently becoming more difficult to treat due to the various resistance mechanisms and different virulence factors. The purpose of this study was to determine the risk factors independently associated with the development of bacteremia by carbapenem-resistant P. aeruginosa, the frequency of virulence genes in metallo-β-lactamases producers and to evaluate their ability to produce biofilm. We conducted a case-control study in the Uberlândia Federal University - Hospital Clinic, Brazil...
November 26, 2016: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
https://www.readbyqxmd.com/read/28025438/effect-of-frequency-on-the-fatigue-strength-of-dentin-bonds
#10
Donal D Scheidel, Toshiki Takamizawa, Wayne W Bakmeier, Robert L Erickson, Akimasa Tsujimoto, Masashi Miyazaki
This study aimed to investigate the effect of frequency on shear fatigue strength (SFS). The SFS of a resin composite bonded to dentin was determined using three self-etch adhesive systems: G-ænial Bond, Scotchbond Universal, and Optibond XTR. The staircase method of fatigue testing was used to determine the SFS at frequencies of 5, 10, and 20 Hz for 50,000 cycles. The failed bonding sites observed were classified based on the type of bond failure as follows: adhesive failure, cohesive failure in composite, cohesive failure in dentin, or mixed failure (partially adhesive, partially cohesive)...
2016: Journal of Oral Science
https://www.readbyqxmd.com/read/28024348/polydopamine-enabled-approach-toward-tailored-plasmonic-nanogapped-nanoparticles-from-nanogap-engineering-to-multifunctionality
#11
Jiajing Zhou, Qirong Xiong, Jielin Ma, Jinghua Ren, Phillip B Messersmith, Peng Chen, Hongwei Duan
We present a platform strategy that offers diverse flexibility in tailoring the structure and properties of core-shell plasmonic nanoparticles with built-in nanogaps. Our results have demonstrated that polydopamine serves multiple concerted functions as a nanoscale spacer to afford controllable nanogap sizes, a redox-active coating to promote metal shell growth, and a reactive scaffold to exclusively lock molecular probes inside the nanogap for surface-enhanced Raman scattering (SERS). More interestingly, the universal adhesion of polydopamine on diverse colloidal substrates allows for customized synthesis of multishell plasmonic nanogapped nanoparticles (NNPs) and multifunctional hybrid NNPs containing different cores (i...
December 27, 2016: ACS Nano
https://www.readbyqxmd.com/read/28024165/evaluation-of-pit-and-fissure-sealants-placed-with-four-different-bonding-protocols-a-randomized-clinical-trial
#12
Manasi Khare, Baranya Shrikrishna Suprabha, Ramya Shenoy, Arathi Rao
BACKGROUND: Application of adhesive after acid etching may increase the retention of pit-and-fissure sealants and improve clinical effectiveness. AIMS: To clinically evaluate the retention, marginal discoloration and caries incidence of pit-and-fissure sealants applied using four bonding protocols: conventional acid etching, etch-and-rinse adhesive, multimode universal adhesive and self-etch adhesive used after acid etching. DESIGN: In this split-mouth design study, the four adhesive protocols were randomly assigned to the four erupted, non-carious first permanent molars and involved 52 patients between 6 and 10 years of age...
December 26, 2016: International Journal of Paediatric Dentistry
https://www.readbyqxmd.com/read/28008204/novel-and-recurrent-atp2a2-mutations-in-japanese-patients-with-darier-s-disease
#13
Kana Noda, Takuya Takeichi, Yusuke Okuno, Hiromichi Takama, Shunsuke Miura, Shinji Kagami, Haruko Hino, Yuki Nakamura, Yumi Fujio, Izumi Konohana, Ayako Otani, Hideki Mukai, Kazumitsu Sugiura, Masashi Akiyama
Darier's disease (DD, keratosis follicularis: OMIM#124200) is an autosomal dominant skin disorder characterized by multiple dark brown keratotic plaques and warty papules covered by thick crusts. Most cases of DD are caused by mutations in ATP2A2, which is expressed in both the skin and the brain. ATP2A2 encodes the cardiac muscle SERCA2a protein and the ubiquitously expressed SERCA2b. SERCA2 plays an important role as a calcium pump. It is thought that a mutation in ATP2A2 causes dyskeratosis and abnormality of cell-cell adhesion...
December 2016: Nagoya Journal of Medical Science
https://www.readbyqxmd.com/read/28000487/risk-factors-for-post-colectomy-adhesive-small-bowel-obstruction
#14
Edin Husarić, Šefik Hasukić, Nešad Hotić, Amir Halilbašić, Senada Husarić, Ismar Hasukić
OBJECTIVE: The purpose of this study was to assess the risk factors for adhesive small bowel obstruction (SBO) following colectomy for colorectal cancer. PATIENTS AND METHODS: In this retrospective study we analyzed 284 patients who underwent surgery for colorectal cancer at the Department of Surgery University Clinical Center Tuzla in the period from 1st January 2009 until 31st December 2014. All patients underwent open colectomy. The length of follow up was from 6 months to 6 years (median follow up 3 years and 6 months)...
November 2016: Acta Medica Academica
https://www.readbyqxmd.com/read/27987149/electroporation-of-mrna-as-universal-technology-platform-to-transfect-a-variety-of-primary-cells-with-antigens-and-functional-proteins
#15
Kerstin F Gerer, Stefanie Hoyer, Jan Dörrie, Niels Schaft
Electroporation (EP) of mRNA into human cells is a broadly applicable method to transiently express proteins of choice in a variety of different cell types. We have spent more than a decade to optimize and adapt this method, first for antigen-loading of dendritic cells (DCs), and subsequently for T cells, B cells, bulk PBMCs, and several cell lines. In this regard, antigens were introduced, processed, and presented in context of MHC class I and II. Next to that, functional proteins like adhesion receptors, T-cell receptors (TCRs), chimeric antigen receptors (CARs), constitutively active signal transducers, and others were successfully expressed...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27982188/tensile-strength-of-resin-cements-used-with-base-metals-in-a-simulating-passive-cementation-technique-for-implant-supported-prostheses
#16
Hilmo Barreto Leite Falcão, Ricardo Faria Ribeiro, Raphael Freitas de Souza, Ana Paula Macedo, Rossana Pereira de Almeida
The aim of this study was to analyze the tensile strength of two different resin cements used in passive cementation technique for implant-supported prosthesis. Ninety-six plastic cylinders were waxed in standardized forms, cast in commercially pure titanium, nickel-chromium and nickel-chromium-titanium alloys. Specimens were cemented on titanium cylinders using self-adhesive resin cement or conventional dual-cured resin cement. Specimens were divided in 12 groups (n=8) in accordance to metal, cement and ageing process...
October 2016: Brazilian Dental Journal
https://www.readbyqxmd.com/read/27982181/bonding-of-the-polymer-polyetheretherketone-peek-to-human-dentin-effect-of-surface-treatments
#17
Regina Furbino Villefort Rocha, Lilian Costa Anami, Tiago Moreira Bastos Campos, Renata Marques de Melo, Rodrigo Othávio de Assunção E Souza, Marco Antonio Bottino
Polyetheretherketone (PEEK) is a material suitable for frameworks of fixed dental prostheses. The effect of different surface treatments on the bond strength of PEEK bonded to human dentin was evaluated. One hundred PEEK cylinders (3 mm×3 mm) were divided into five groups according to surface treatment: silica coating, sandblasting with 45 μm Al2O3 particles, etching with 98% sulfuric acid for 5, 30 and for 60 s. These cylinders were luted with resin cement onto 50 human molars. First, each tooth was embedded in epoxy resin and the buccal dentin surface was exposed...
October 2016: Brazilian Dental Journal
https://www.readbyqxmd.com/read/27967320/effect-of-steam-autoclaving-on-the-tensile-strength-of-resin-cements-used-for-bonding-two-piece-zirconia-abutments
#18
Marcos Alexandre Fadanelli, Flà  Via Lucisano Botelho Amaral, Roberta Tarkany Basting, Cecilia Pedroso Turssi, Bruno Salles Sotto-Maior, Fabiana Mantovani Gomes Franà  A
PURPOSE: this study evaluated the effects of steam autoclave sterilization on the tensile strength of two types of resin cements used to bond customized CAD/CAM zirconia abutments onto titanium bases. METHODS: forty sets of zirconia abutments cemented to screwed titanium bases of implants analogs were divided into four groups (n = 10). Two groups were treated with a conventional chemically activated resin cement (ML - Multilink Ivoclar Vivadent) and the other two groups with a self-adhesive dual resin cement (U200 - U200 RelyX 3M ESPE)...
December 14, 2016: Journal of Oral Implantology
https://www.readbyqxmd.com/read/27966507/the-effect-of-pre-etching-with-37-orthophosphoric-acid-on-the-shear-bond-strength-of-orthodontic-brackets-bonded-using-self-etching-primer-adhesive-system
#19
Shaheen Hamdani, G Anita, Javed Sodawala, Sumit Gandhi, Sayyed Muhammad Ali
OBJECTIVES: The purpose of this study was to compare the effect of pre-etching with 37% orthophosphoric acid on the shear bond strength (SBS) of orthodontic brackets bonded using self-etching primer (SEP). MATERIALS AND METHODS: Two hundred freshly extracted human premolars were divided randomly into two groups based on pre-etching with 37% orthophosphoric acid: Group 1 (control, n = 50) without pre-etching and Group 2 (experimental, n = 150) with pre-etching. Group 2 was further divided into three sub groups 2a, 2b, and 2c with 50 teeth each and was first pre-etched with 37% orthophosphoric acid for 10, 30, and 60 s, respectively...
September 2016: Indian Journal of Dental Research: Official Publication of Indian Society for Dental Research
https://www.readbyqxmd.com/read/27942690/equation-of-state-for-random-sphere-packings-with-arbitrary-adhesion-and-friction
#20
Wenwei Liu, Yuliang Jin, Sheng Chen, Hernán A Makse, Shuiqing Li
We systematically generate a large set of random micro-particle packings over a wide range of adhesion and friction by means of adhesive contact dynamics simulation. The ensemble of generated packings covers a range of volume fractions ϕ from 0.135 ± 0.007 to 0.639 ± 0.004, and of coordination numbers Z from 2.11 ± 0.03 to 6.40 ± 0.06. We determine ϕ and Z at four limits (random close packing, random loose packing, adhesive close packing, and adhesive loose packing), and find a universal equation of state ϕ(Z) to describe packings with arbitrary adhesion and friction...
January 4, 2017: Soft Matter
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