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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/28078783/new-propolis-type-from-northeast-brazil-chemical-composition-antioxidant-activity-and-botanical-origin
#2
Joselena M Ferreira, Caroline C Fernandes-Silva, Antonio Salatino, Giuseppina Negri, Dejair Message
BACKGROUND: Propolis is a bee product with wide diversity of biological activity. It has complex composition, which is dependent on its botanical source. The present work aimed at determining the chemical profile, antioxidant activity and botanical origin of two samples of a propolis type from two locations of the state of Rio Grande do Norte (RN, northeast Brazil). RESULTS: The standard chemical characteristics of the RN propolis are similar or superior to the internationally marketed Brazilian green propolis...
January 11, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28077886/effect-of-dental-chair-light-on-enamel-bonding-of-orthodontic-brackets-using-light-cure-based-adhesive-system-an-in-vitro-study
#3
Anil Tiwari, Tarulatha Shyagali, Sarvraj Kohli, Rishi Joshi, Abhishek Gupta, Rana Tiwari
AIM: The aim of this in vitro study was to evaluate the influence of the Dental chair light on the bond strength of light cured composite resin. MATERIALS AND METHODS: Sixty therapeutically extracted human premolar teeth were randomly allocated to two groups of 30 specimens each. In both groups light cured composite resin (Transbond XT) and MBT premolar metal brackets (3M Unitek) was used to bond brackets. In group I and II light curing was done using Light-emitting diode light curing units without and with the dental chair light respectively...
October 2016: Acta Informatica Medica: AIM
https://www.readbyqxmd.com/read/28076497/one-year-aging-effects-on-microtensile-bond-strengths-of-composite-and-repairs-with-different-surface-treatments
#4
Marcela Oliveira de Souza, Vicente Castelo Branco Leitune, Stéfani Becker Rodrigues, Susana Maria Werner Samuel, Fabrício Mezzomo Collares
The present study aimed to evaluate effects of different surface treatments and aging of composite cylinders on bond strength of composite resin repair. Thirty-two composite cylinders were produced and divided into four groups according to type of surface treatment and storage time of composite cylinder and repair. Cylinder surface of control group (Gcontrol) received no treatment before composite repair. Other groups were sandblasted with aluminum oxide (GAl2O3), followed by silane (GAl2O3sil) or adhesive (GAl2O3ad)...
January 5, 2017: Brazilian Oral Research
https://www.readbyqxmd.com/read/28074877/microwave-synthesized-freestanding-iron-carbon-nanotubes-on-polyester-composites-of-woven-kevlar-fibre-and-silver-nanoparticle-decorated-graphene
#5
Ankita Hazarika, Biplab K Deka, DoYoung Kim, Kyungil Kong, Young-Bin Park, Hyung Wook Park
We synthesized Ag nanoparticle-decorated multilayered graphene nanosheets (Ag-graphene) from graphite nanoplatelets and silver nitrate through 90-100 s of microwave exposure, without the use of any mineral acids or harsh reducing agents. Fe nanoparticle-decorated carbon nanotubes (Fe-CNTs) were grown on polypyrrole (PPy) deposited on woven Kevlar fibre (WKF), using ferrocene as a catalyst, under microwave irradiation. Fe-CNTs grown on WKF and Ag-graphene dispersed in polyester resin (PES) were combined to fabricate Ag-graphene/Fe-CNT/PPy-coated WKF/PES composites by vacuum-assisted resin transfer moulding...
January 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28072686/design-and-fabrication-of-complete-dentures-using-cad-cam-technology
#6
Weili Han, Yanfeng Li, Yue Zhang, Yuan Lv, Ying Zhang, Ping Hu, Huanyue Liu, Zheng Ma, Yi Shen
The aim of the study was to test the feasibility of using commercially available computer-aided design and computer-aided manufacturing (CAD/CAM) technology including 3Shape Dental System 2013 trial version, WIELAND V2.0.049 and WIELAND ZENOTEC T1 milling machine to design and fabricate complete dentures.The modeling process of full denture available in the trial version of 3Shape Dental System 2013 was used to design virtual complete dentures on the basis of 3-dimensional (3D) digital edentulous models generated from the physical models...
January 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28072513/synthesis-of-graphene-oxide-based-sulphonated-oligoanilines-coatings-for-synergistically-enhanced-corrosion-protection-in-3-5-nacl-solution
#7
Hao Lu, Shengtao Zhang, Weihua Li, Yanan Cui, Tao Yang
As a vital derivative of graphene, graphene oxide (GO) is widely applied in various fields, such as transparent electrodes, solar cells, energy storage and corrosion protection due to the large specific surface area and abundant active sites. However, compared with graphene, the application of GO has been less reported in metal corrosion protection field. Therefore, in our study, 3-aminobenzenesulfonic acid (m-ABSA) was selected to combine with oligoanilines to fabricate the GO-based sulphonated oligoanilines coatings for marine corrosion protection application...
January 10, 2017: ACS Applied Materials & Interfaces
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
#8
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/28070263/evaluating-the-microshear-bond-strength-and-microleakage-of-flowable-composites-containing-zinc-oxide-nano-particles
#9
Koorosh Teymoornezhad, Homayoun Alaghehmand, Ghazaleh Daryakenari, Soraya Khafri, Mitra Tabari
INTRODUCTION: Preventive resin restorations (PRR) are the conservative choice for the most common carious lesions in children. Thus, new age flowable resin composites with higher filler content are readily used. The aim of this study was to evaluate the microshear bond strength and microleakage of two flowable resin composites containing different percentages of nano zinc oxide (NZnO) particles, which have proven to have antimicrobial properties. METHODS: This experimental in-vitro study was carried out in the Dental Material Research Center of Babol University of Medical Sciences in 2015...
November 2016: Electronic Physician
https://www.readbyqxmd.com/read/28068270/influence-of-polishing-on-surface-roughness-following-toothbrushing-wear-of-composite-resins
#10
Karine Battestin Dalla-Vecchia, Talita Damas Taborda, Deborah Stona, Heloísa Pressi, Luiz Henrique Burnett Júnior, Sinval Adalberto Rodrigues-Junior
This study aimed to evaluate the influence of different polishing systems on the surface roughness of composite resins following procedures to simulate the effects of toothbrushing over time. Four currently available commercial composites were used to make 128 cylindrical specimens. The specimens were randomly allocated to polishing with a 1-step polisher or 1 of 3 multistep polishers (n = 8 per group). The baseline surface roughness was measured, and the specimens were submitted to 5000, 10,000, and 20,000 brushing cycles to represent toothbrushing throughout 6, 12, and 24 months, respectively...
January 2017: General Dentistry
https://www.readbyqxmd.com/read/28068260/direct-composite-resin-onlays-rationale-and-clinical-application
#11
Roger A Solow
No abstract text is available yet for this article.
January 2017: General Dentistry
https://www.readbyqxmd.com/read/28066997/effect-of-mold-diameter-on-the-depth-of-cure-of-a-resin-based-composite-material
#12
Robert L Erickson, Wayne W Barkmeier
The purpose of this study was to examine the effect of mold diameter on depth of cure of a resin-based composite material for varying amounts of irradiation. A resin-based composite was light-cured for 10-80 s in stainless-steel molds of either 6 mm or 4 mm in diameter and then dark-stored for 24 h. Specimens were then scraped back and the length of the cured specimens was measured to provide depth of cure (DSB ). Radiant exposure to each of the mold diameters was determined by measuring the power. The DSB values using the 4-mm molds were lower than those of the 6-mm molds...
January 9, 2017: European Journal of Oral Sciences
https://www.readbyqxmd.com/read/28063316/salivary-bisphenol-a-levels-and-their-association-with-composite-resin-restoration
#13
Jung-Ha Lee, Seung-Kyoo Yi, Se-Yeon Kim, Ji-Soo Kim, Sung-Ae Son, Seung-Hwa Jeong, Jin-Bom Kim
Composite resin has been increasingly used in an effort to remove minimal amount of tooth structure and are used for restoring not just carious cavities but also cervical abrasion. To synthesize composite resin, bisphenol A (BPA) is used. The aim of the study was to measure the changes in salivary BPA level related with composite resin restoration. ELISA was used to examine the BPA levels in the saliva collected from 30 volunteers whose teeth were filled with composite resin. Salivary samples were collected immediately before filling and 5 min and 7 d after filling...
December 27, 2016: Chemosphere
https://www.readbyqxmd.com/read/28054792/minimally-invasive-dentistry-a-conservative-approach-to-smile-makeover
#14
Jeffrey M Rosenberg
The concept of minimally invasive dentistry is based on preserving tooth structure, especially enamel. A conservative method to treat discolored teeth that have diastemas is a freehand additive technique using composite resin. While selecting the correct shade of resin can be challenging, newer composite resin formulations are being developed with optical properties that enable the material to more effectively blend into the dentition. This case report describes the use of conservative approaches and materials to treat discolored, unevenly spaced teeth and restore harmony and balance to a patient's smile...
January 2017: Compendium of Continuing Education in Dentistry
https://www.readbyqxmd.com/read/28054260/effect-of-er-yag-laser-on-dentin-demineralization-around-restorations
#15
Michelle Alexandra Chinelatti, Cristiane Tomaz Rocha, Vivian Colucci, Mônica Campos Serra, Antonio Luiz Rodrigues-Júnior, Silmara Aparecida Milori Corona
The aim of this study was to evaluate the effect of cavity preparation with Er:YAG laser on dentin adjacent to restorations submitted to cariogenic challenge in situ, by subsuperficial microhardness analysis. Bovine incisors were sectioned, flattened, and polished, resulting in 40 dentin slabs. The slabs were randomly assigned to four groups (n = 10), according to the cavity preparation method: I-high-speed handpiece (control); II-Er:YAG laser (160 mJ; 3 Hz); III-Er:YAG laser (260 mJ; 3 Hz); IV-Er:YAG laser (300 mJ; 3Hz)...
January 4, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28054040/systematic-review-on-highly-viscous-glass-ionomer-cement-resin-coating-restorations-part-ii-%C3%A2-do-they-merge-minamata-convention-and-minimum-intervention-dentistry
#16
Andrej M Kielbassa, Georg Glockner, Michael Wolgin, Karl Glockner
BACKGROUND: With the Minamata Convention the use of mercury will be phased down, and this undoubtedly will have an effect on dental treatment regimens and economic resources. Composite resin restorations are considered viable alternatives to amalgam fillings; however, these will not be covered completely by health insurance systems in many countries. Recently, a high-viscosity glass-ionomer cement (hvGIC) processed with a resinous coating (RC) has been introduced, and has been marketed as a restorative material in load-bearing Class I cavities (and in Class II cavities with limited size), thus serving as a possible alternative to amalgam fillings...
2017: Quintessence International
https://www.readbyqxmd.com/read/28052208/microleakage-evaluation-of-composite-restorations-following-papain-based-chemo-mechanical-caries-removal-in-primary-teeth
#17
Marwa Abdel Hafez, Mona Elkateb, Sonia El Shabrawy, Amel Mahmoud, Omar El Meligy
AIM: To evaluate the microleakage of composite restorations following Papain-based chemo-mechanical caries removal compared to the conventional drilling method. The characteristic of the hybrid layer was also studied using scanning electron microscopy. STUDY DESIGN: The sample included thirty freshly extracted and exfoliated primary molars with open proximal carious dentin lesions. Teeth were divided into two equal groups, according to method of caries removal. Following caries removal, cavity preparations were restored with composite resin...
2017: Journal of Clinical Pediatric Dentistry
https://www.readbyqxmd.com/read/28050983/wear-resistance-of-bulk-fill-composite-resin-restorative-materials-polymerized-under-different-curing-intensities
#18
Fahad Alkhudhairy
INTRODUCTION: The aim of this study was to assess the wear resistance of four bulk-fill composite resin restorative materials cured using high- and low-intensity lights. MATERIALS AND METHODS: Twenty-four samples were prepared from each composite resin material (Tetric N-Ceram, SonicFill, Smart Dentin Replacement, Filtek Bulk-Fill) resulting in a total of 96 samples; they were placed into a mold in a single increment. All of the 96 samples were cured using the Bluephase N light curing unit for 20 seconds...
January 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/28050982/effect-of-tannic-acid-on-bond-strength-of-etch-and-rinse-and-self-etch-adhesive-systems-in-dentin-of-primary-teeth
#19
Masoumeh Ebrahimi, Alireza Sarraf Shirazi, Faraneh Abdolhoseinpour, Mojtaba Abdollahi
INTRODUCTION: One of the possible mechanisms for the gradual destruction of bond strength in dentin-resin interface, could be due to the demineralized unstable collagen matrix. Use of protease inhibitors, such as tannic acid (TA) could prevent destruction of collagen fibers. The aim of this study was to compare the TA effect on bond strength of etch and rinse and self-etch adhesive systems in the dentin of primary teeth. MATERIALS AND METHODS: This in vitro study was done on 40 extracted primary molar teeth...
January 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/28048345/su-d-brc-04-development-of-proton-tissue-equivalent-materials-for-calibration-and-dosimetry-studies
#20
E Olguin, S Flampouri, I Lipnharski, W Bolch
PURPOSE: To develop new proton tissue equivalent materials (PTEM), urethane and fiberglass based, for proton therapy calibration and dosimetry studies. Existing tissue equivalent plastics are applicable only for x-rays because they focus on matching mass attenuation coefficients. This study aims to create new plastics that match mass stopping powers for proton therapy applications instead. METHODS: New PTEMs were constructed using urethane and fiberglass resin materials for soft, fat, bone, and lung tissue...
June 2016: Medical Physics
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