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https://www.readbyqxmd.com/read/29234755/self-etching-enamel-bonding-using-acidic-functional-monomers-with-different-length-carbon-chains-and-hydrophilicity
#1
Viviane Hass, Gabriel Abuna, Victor Pinheiro Feitosa, Eveline Claudia Martini, Mario Alexandre Sinhoreti, Roberta Furtado Carvalho, Matheus Coelho Bandéca, Salvatore Sauro, Alessandro D Loguercio
PURPOSE: To compare the enamel bonding performace of two commercial and three experimental two-step self-etch adhesives containing acidic functional monomers with different carbon-spacer length and hydrophilicity. The contact angle was also assessed to evaluate the wettability of each tested material. MATERIALS AND METHODS: Forty extracted human molars were sectioned into four parts (buccal, lingual, mesial, and distal) and divided into 5 groups, according to the adhesives used: Clearfil SE Bond (CSE), AdheSE (ADSE), 10-MDP (15 mol% 10-methacryloyldecylphosphate), CAP-P (15 mol% caprolactone phosphate), and MTEP (15 mol% methacryloyltetraethylene phosphate)...
December 12, 2017: Journal of Adhesive Dentistry
https://www.readbyqxmd.com/read/29232687/photochemotherapy-and-graft-versus-leukemia-reaction-in-acute-leukemia-tumor-immunity-and-survival-are-dependent-on-timing-of-photochemotherapy-of-the-skin
#2
Nicolas Feldreich, Olle Ringden, Lennart Emtestam
BACKGROUND: Cure of acute leukemia after transplantation is mediated by the grafted cells. We investigated the graft-versus-leukemia effect (GVL) in patients with cutaneous acute graft-versus-host disease (GVHD) treated with photochemotherapy (psoralen and ultraviolet light type A). METHOD: Forty-seven patients with acute leukemia were followed 5,000 days after transplantation to assess survival and GVL by multivariate analysis. The primary predictor was time to treatment of cutaneous acute GVHD by photochemotherapy separated into treatment start during the first week of acute GVHD versus after the first week of acute GVHD...
December 13, 2017: Dermatology: International Journal for Clinical and Investigative Dermatology
https://www.readbyqxmd.com/read/29227574/light-treatments-of-nail-fungal-infections
#3
REVIEW
Jessica Houang, Gabriel Perrone, Damia Mawad, Philip C Boughton, Andrew J Ruys, Antonio Lauto
Nail fungal infections are notoriously persistent and difficult to treat which can lead to severe health impacts, particularly in the immunocompromised. Current antifungal treatments, including systemic and topical drugs, are prolonged and do not effectively provide a complete cure. Severe side effects are also associated with systemic antifungals, such as hepatoxicity. Light treatments of onychomycosis are an emerging therapy that has localised photodynamic, photothermal or photoablative action. These treatments have shown to be an effective alternative to traditional antifungal remedy with comparable or better cure rates achieved in shorter times and without systemic side effects...
December 11, 2017: Journal of Biophotonics
https://www.readbyqxmd.com/read/29223038/polymer-matrix-of-fiber-reinforced-composites-changes-in-the-semi-interpenetrating-polymer-network-during-the-shelf-life
#4
Aftab A Khan, Abdulaziz A Al-Kheraif, Abdullah M Al-Shehri, Eija Säilynoja, Pekka K Vallittu
This laboratory study was aimed to characterize semi-interpenetrating polymer network (semi-IPN) of fiber-reinforced composite (FRC) prepregs that had been stored for up to two years before curing. Resin impregnated prepregs of everStick C&B (StickTech-GC, Turku, Finland) glass FRC were stored at 4°C for various lengths of time, i.e., two-weeks, 6-months and 2-years. Five samples from each time group were prepared with a light initiated free radical polymerization method, which were embedded to its long axis in self-curing acrylic...
November 26, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/29222231/al-amyloidosis-from-molecular-mechanisms-to-targeted-therapies
#5
REVIEW
Giampaolo Merlini
Systemic amyloidosis is caused by misfolding and extracellular deposition of circulating proteins as amyloid fibrils, resulting in the dysfunction of vital organs. The most common systemic amyloidosis, light-chain (AL) amyloidosis, is caused by misfolded light chains produced by a small, dangerous B-cell clone. The process of amyloid formation, organ targeting, and damage is multifaceted and, after disease initiation, the complexity of the downstream pathogenic cascade increases, rendering its control a challenge...
December 8, 2017: Hematology—the Education Program of the American Society of Hematology
https://www.readbyqxmd.com/read/29221001/two-dimensional-grating-guided-mode-resonance-tunable-filter
#6
Wen-Kai Kuo, Che-Jung Hsu
A two-dimensional (2D) grating guided-mode resonance (GMR) tunable filter is experimentally demonstrated using a low-cost two-step nanoimprinting technology with a one-dimensional (1D) grating polydimethylsiloxane mold. For the first nanoimprinting, we precisely control the UV LED irradiation dosage and demold the device when the UV glue is partially cured and the 1D grating mold is then rotated by three different angles, 30°, 60°, and 90°, for the second nanoimprinting to obtain 2D grating structures with different crossing angles...
November 27, 2017: Optics Express
https://www.readbyqxmd.com/read/29218856/preparation-of-fluoride-loaded-microcapsules-for-anticariogenic-bacterial-growth-using-a-coaxial-ultrasonic-atomizer
#7
Hae-Won Choi, Seung-Hoon Um, Sang-Hoon Rhee
A new method to deliver fluoride using biodegradable poly(lactic-co-glycolic acid) microcapsules to suppress cariogenic bacterial growth during orthodontic treatment was investigated. A coaxial ultrasonic atomizer was used to encapsulate KF solution into microcapsules. The orthodontic adhesive resin disk containing fluoride loaded microcapsules (DFLM) was prepared by LED light curing. The microstructure of microcapsules, successful loading of KF, fracture strength, and shear bonding strength were assessed by FE-SEM, confocal laser scanning microscope, and general purpose testing machine, respectively...
January 2018: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/29215690/impact-of-material-shade-and-distance-from-light-curing-unit-tip-on-the-depth-of-polymerization-of-composites
#8
André L Faria-E-Silva, Christopher Fanger, Lillian Nguyen, Demetri Howerton, Carmem S Pfeifer
This study aimed to evaluate the effect of the composite shade and distance from the light-curing unit (LCU) tip on the irradiance reaching the bottom of composite disks and on the depth of polymerization. Composites of three shades (opaque - OXDC, bleach - BXL, and A2) were inserted into molds with 3-mm of thickness positioned over a spectrometer and photo-activated with the LCU (Bluephase) tip placed at 0 or 1 cm from the composite surface. The mean irradiance reaching the bottom of composite was recorded during the entire photo-activation (30 s)...
September 2017: Brazilian Dental Journal
https://www.readbyqxmd.com/read/29215689/influence-of-hemostatic-solution-on-bond-strength-and-physicochemical-properties-of-resin-cement
#9
Isabela Sousa de Araújo, Célio Jesus do Prado, Luís Henrique Araújo Raposo, Carlos José Soares, Rayssa Ferreira Zanatta, Carlos Rocha Gomes Torres, Reinaldo Ruggiero, Gisele Rodrigues da Silva
The aim of this study was to evaluate the degree of conversion, color stability, chemical composition, and bond strength of a light-cured resin cement contaminated with three different hemostatic solutions. Specimens were prepared for the control (uncontaminated resin cement) and experimental groups (resin cement contaminated with one of the hemostatic solutions) according to the tests. For degree of conversion, DC (n = 5) and color analyses (n = 10), specimens (3 mm in diameter and 2 mm thick) were evaluated by Fourier transform infrared spectroscopy (FTIR) and CIELAB spectrophotometry (L*, a*, b*), respectively...
September 2017: Brazilian Dental Journal
https://www.readbyqxmd.com/read/29215170/synthetic-light-curable-polymeric-materials-provide-a-supportive-niche-for-dental-pulp-stem-cells
#10
Kyle H Vining, Jacob C Scherba, Alaina M Bever, Morgan R Alexander, Adam D Celiz, David J Mooney
Dental disease annually affects billions of patients, and while regenerative dentistry aims to heal dental tissue after injury, existing polymeric restorative materials, or fillings, do not directly participate in the healing process in a bioinstructive manner. There is a need for restorative materials that can support native functions of dental pulp stem cells (DPSCs), which are capable of regenerating dentin. A polymer microarray formed from commercially available monomers to rapidly identify materials that support DPSC adhesion is used...
December 7, 2017: Advanced Materials
https://www.readbyqxmd.com/read/29211292/influence-of-curing-protocol-and-ceramic-composition-on-the-degree-of-conversion-of-resin-cement
#11
Marcos Daniel Septimio Lanza, Marcello Rubens Barsi Andreeta, Thiago Amadei Pegoraro, Luiz Fernando Pegoraro, Ricardo Marins De Carvalho
OBJECTIVE: Due to increasing of aesthetic demand, ceramic crowns are widely used in different situations. However, to obtain long-term prognosis of restorations, a good conversion of resin cement is necessary. To evaluate the degree of conversion (DC) of one light-cure and two dual-cure resin cements under a simulated clinical cementation of ceramic crowns. MATERIAL AND METHODS: Prepared teeth were randomly split according to the ceramic's material, resin cement and curing protocol...
November 2017: Journal of Applied Oral Science: Revista FOB
https://www.readbyqxmd.com/read/29211129/influence-of-different-concentration-and-ratio-of-a-photoinitiator-system-on-the-properties-of-experimental-resin-composites
#12
Caio Vinícius Signorelli Grohmann, Eveline Freitas Soares, Eduardo José Carvalho Souza-Junior, William Cunha Brandt, Regina Maria Puppin-Rontani, Saulo Geraldeli, Mário Alexandre Coelho Sinhoreti
The aim in this study was to evaluate the influence of different ratio of camphorquinone/tertiary amine concentration on the flexural strength (FS), elastic modulus (EM), degree of conversion (DC), yellowing (YL), water sorption (WS) and water solubility (WSL) of experimental composites. Thus, acrylate blends were prepared with different camphorquinone (CQ) and amine (DABE) concentrations and ratios by weight: (CQ/DABE%): 0.4/0.4% (C1), 0.4/0.8% (C2), 0.6/0.6% (C3), 0.6/1.2% (C4), 0.8/0.8% (C5), 0.8/1.6% (C6), 1...
November 2017: Brazilian Dental Journal
https://www.readbyqxmd.com/read/29205770/effect-of-tooth-brushing-on-gloss-retention-and-surface-roughness-of-five-bulk-fill-resin-composites
#13
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/29199008/photopolymerization-of-cell-laden-gelatin-methacryloyl-hydrogels-using-a-dental-curing-light-for-regenerative-dentistry
#14
Nelson Monteiro, Greeshma Thrivikraman, Avathamsa Athirasala, Anthony Tahayeri, Cristiane M França, Jack L Ferracane, Luiz E Bertassoni
Photopolymerized hydrogels, such as gelatin methacryloyl (GelMA), have desirable biological and mechanical characteristics for a range of tissue engineering applications. OBJECTIVE: This study aimed to optimize a new method to photopolymerize GelMA using a dental curing light (DL). METHODS: Lithium acylphosphinate photo-initiator (LAP, 0.05, 0.067, 0.1% w/v) was evaluated for its ability to polymerize GelMA hydrogel precursors (10% w/v) encapsulated with odontoblast-like cells (OD21)...
November 30, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/29193594/complete-cure-of-fusarium-solani-sp-complex-onychomycosis-with-qs-ndyag-treatment
#15
Ananta Khurana, Anuradha Chowdhary, Kabir Sardana, R K Gautam, P K Sharma
The incidence of non dermatophytic mould (NDM) onychomycosis (OM) has been steadily increasing Fusarium spp is the most common cause of NDM OM in most geographical locations. Fusarium spp and other NDMs are largely resistant to commonly used anti-fungals. The successful use of laser and light based devices has been demonstrated in dermatophytic OM, but there is no previous report of their successful use in any NDM OM. We describe a patient with OM caused by Fusarium solani spp, who was clinically (with a normal appearing nail) and mycologically (with negative microscopy and culture on repeated samples) cured of her infection following treatment with 2 sessions of Qs NdYAG (532nm and 1064nm) given 1 month apart...
November 28, 2017: Dermatologic Therapy
https://www.readbyqxmd.com/read/29193037/model-answers-rational-application-of-murine-models-in-arthritis-research
#16
REVIEW
Robert A Benson, Iain B McInnes, Paul Garside, James M Brewer
Advances in targeted immune therapeutics have profoundly improved clinical outcomes for patients with inflammatory arthropathies particularly rheumatoid arthritis. The landscape of disease that is observed and the treatment outcomes desired for the future have also progressed. As such there is an increasing move away from traditional models of end-stage, chronic disease with recognition of the need to consider the earliest phases of pathogenesis as a target for treatment leading to resolution and/or cure. In order to continue the discovery process and enhance our understanding of disease and treatment, we therefore need to continuously revisit the animal models we employ and assess their relevance and utility in the light of contemporary therapeutic goals...
November 28, 2017: European Journal of Immunology
https://www.readbyqxmd.com/read/29188987/multifunctional-moth-eye-tio2-pdms-pads-with-high-transmittance-and-uv-filtering
#17
Segeun Jang, Seong Min Kang, Mansoo Choi
This work reports a facile fabrication method for constructing multifunctional moth-eye TiO2/PDMS pads using soft nano-imprinting lithography and a gas-phase deposited thin sacrificial layer. Mesoporous TiO2 nanoparticles acted as an effective UV-filter, completely blocking high energy UVB light and partially blocking UVA light, forming a robust TiO2/PDMS composite pad by allowing the PDMS solution to easily fill the porous TiO2 network. The paraboloid shaped moth-eye nanostructures provided high transparency in the visible spectrum as well as having self-cleaning effects due to nano-roughness on the surface...
November 30, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29183672/bisphenol-a-release-from-an-orthodontic-resin-composite-a-gc-ms-and-lc-ms-study
#18
Marc Deviot, Isabelle Lachaise, Christof Högg, Jürgen Durner, Franz-Xaver Reichl, Jean-Pierre Attal, Elisabeth Dursun
OBJECTIVES: First, to analyse the in vitro release of BPA and Bis-GMA from an orthodontic resin composite (Transbond XT, 3M Unitek), stored in various conditions, by gas chromatography/mass spectrometry (GC/MS) and liquid chromatography/mass spectrometry (LC/MS); then to extrapolate the data to the clinical situation. Secondly, to explore the thermal stability of Bis-GMA. METHODS: Cylinders of resin composite were prepared and stored according to 3 different protocols: (1) they were light-cured 20s, then placed in artificial saliva; (2) they were light-cured 2s, then placed in acetonitrile; (3) they were light-cured 2s, then placed in methanol...
November 25, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/29178766/light-energy-transmission-and-vickers-hardness-ratio-of-bulk-fill-resin-based-composites-at-different-thicknesses-cured-by-a-dual-wave-or-a-single-wave-light-curing-unit
#19
Ario Santini, Reem Khalil Naaman, Mohammed Saeed Aldossary
PURPOSE: To quantify light energy transmission through two bulk-fill resin-based composites and to measure the top to bottom surface Vickers hardness ratio (VHratio) of samples of various incremental thicknesses, using either a single-wave or dual-wave light curing unit (LCU). METHODS: Tetric EvoCeram Bulk Fill (TECBF) and SonicFill (SF) were studied. Using MARC-RC, the irradiance delivered to the top surface of the samples 2, 3, 4 and 5 mm thick (n= 5 for each thickness) was adjusted to 800 mW/cm2 for 20 seconds (16 J/cm2) using either a single-wave, Bluephase or a dual-wave, Bluephase G2 LCUs...
April 2017: American Journal of Dentistry
https://www.readbyqxmd.com/read/29178755/prognosis-test-by-visualization-of-demineralized-dentin-under-restorations-to-prevent-initial-wall-lesions-initiated-by-lactic-acid
#20
Morakot Piemjai, Pareewan Chantarawej, Nobuo Nakabayashi, Franklin Garcia-Godoy
PURPOSE: To visualize the complete protection of restored dentin in the acidic environment by the complete impregnation of resin into demineralized dentin. METHODS: Class V cavities prepared in extracted human molars composed of enamel, cementum and dentin surfaces were sealed using either 4-META/MMA-TBB resin with conditioning periods of 10, 30, 60 seconds with 10% citric acid and 3% ferric chloride mixed aqueous solution (10-3) or Single-Bond 2 adhesives prior to restoration with light-cured resin-composite...
June 2017: American Journal of Dentistry
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