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Bulk fill composites

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https://www.readbyqxmd.com/read/28435361/effects-of-delivering-the-same-radiant-exposures-at-730-1450-and-2920-mw-cm-2-to-two-resin-based-composites
#1
Maan M AlShaafi
OBJECTIVE: To evaluate the effects of curing two resin-based composites (RBC) with the same radiant exposures at 730, 1450, and 2920 mW/cm(2). MATERIALS AND METHODS: Two types of RBC, Filtek Supreme Ultra and Tetric-EvoCeram-Bulk Fill, were light-cured to deliver the same radiant exposures for 5, 10, or 20 s by means of a modified Valo light emitted diode light-curing unit with the light tip placed directly over each specimen. The RBC was expressed into metal rings that were 2...
January 2017: European Journal of Dentistry
https://www.readbyqxmd.com/read/28413061/mechanical-behavior-of-bulk-direct-composite-versus-block-composite-and-lithium-disilicate-indirect-class-ii-restorations-by-cad-fem-modeling
#2
Pietro Ausiello, Stefano Ciaramella, Andrea Fabianelli, Antonio Gloria, Massimo Martorelli, Antonio Lanzotti, David C Watts
OBJECTIVES: To study the influence of resin based and lithium disilicate materials on the stress and strain distributions in adhesive class II mesio-occlusal-distal (MOD) restorations using numerical finite element analysis (FEA). To investigate the materials combinations in the restored teeth during mastication and their ability to relieve stresses. METHODS: One 3D model of a sound lower molar and three 3D class II MOD cavity models with 95° cavity-margin-angle shapes were modelled...
April 13, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28412791/-surface-roughness-and-gloss-of-novel-flowable-composites-after-polishing-and-simulated-brushing-wear
#3
R L Wang, C Y Yuan, Y X Pan, F C Tian, Z H Wang, X Y Wang
Objective: To investigate surface properties of novel flowable composites after polishing and simulated brushing wear, compared to their pasty counterpart. Methods: Composites employed in this study were: three flowable composites (A1: Clearfil Majesty ES Flow; B1: Beautifil Flow Plus F00; C1: Filtek Bulk Fill) and three paste composites (A2: Clearfil Majesty; B2: Beautifil; C2: Filtek Z350. Eleven disk-shaped specimens were made for each material. The specimens were cured, then subjected to sandpaper finishing for 20 s, one-step polishing for 30 s, finally subjected to simulated brushing for 10 000 cycles...
April 9, 2017: Zhonghua Kou Qiang Yi Xue za Zhi, Zhonghua Kouqiang Yixue Zazhi, Chinese Journal of Stomatology
https://www.readbyqxmd.com/read/28402737/comparison-of-polymerization-shrinkage-physical-properties-and-marginal-adaptation-of-flowable-and-restorative-bulk-fill-resin-based-composites
#4
J H Jung, S H Park
PURPOSE: The purpose of this study was to compare the marginal adaptation of two flowable bulk fill resin-based composites (FB-RBCs), two restorative bulk fill resin-based composites (RB-RBCs), and one regular incremental-fill RBC in MOD cavities in vitro. Additionally, the influence of linear polymerization shrinkage, shrinkage force, flexural modulus, and bottom/top surface hardness ratio on the marginal adaptation was evaluated. METHODS: A Class II MOD cavity was prepared in 40 extracted sound lower molars...
April 12, 2017: Operative Dentistry
https://www.readbyqxmd.com/read/28402731/characterization-of-inorganic-filler-content-mechanical-properties-and-light-transmission-of-bulk-fill-resin-composites
#5
B M Fronza, Apa Ayres, R R Pacheco, F A Rueggeberg, Cts Dias, M Giannini
OBJECTIVES: The aims of this study were to characterize inorganic content (IC), light transmission (LT), biaxial flexural strength (BFS), and flexural modulus (FM) of one conventional (layered) and four bulk-fill composites at different depths. METHODS: Bulk-fill composites tested were Surefil SDR flow (SDR), Filtek Bulk Fill (FBF), Tetric EvoCeram Bulk Fill (TEC), and EverX Posterior (EXP). Herculite Classic (HER) was used as a control. Energy dispersive x-ray analysis and scanning electron microscopy were used to characterize filler particle composition and morphology...
April 12, 2017: Operative Dentistry
https://www.readbyqxmd.com/read/28402730/light-emitting-diode-beam-profile-and-spectral-output-influence-on-the-degree-of-conversion-of-bulk-fill-composites
#6
M G Rocha, Dcrs de Oliveira, I C Correa, L Correr-Sobrinho, Mac Sinhoreti, J L Ferracane, A B Correr
OBJECTIVES: To evaluate the beam profile and the spectral output of monowave and polywave light-emitting diodes (LEDs) and their influence on the degree of conversion (DC) of bulk fill composites. METHODS: A monowave LED (Smartlite Focus, Dentsply) and a polywave LED (Valo Cordless, Ultradent) were characterized using a resin calibrator and a laser beam profile analyzer. Two bulk fill composites, Sonic Fill 2 (SF) containing camphorquinone (CQ) and Tetric EvoCeram Bulk Fill (TEB) containing CQ associated with alternative photoinitiators, were placed in custom-designed molds (n=3) and photoactivated by the monowave or polywave LED with 20 J/cm(2)...
April 12, 2017: Operative Dentistry
https://www.readbyqxmd.com/read/28392818/comparison-of-push-out-bond-strength-of-two-bulk-fill-and-one-conventional-composite-to-intracanal-dentin-in-severely-damaged-primary-anterior-teeth
#7
Shahram Mosharrafian, Zeynab Sharifi
OBJECTIVES: This study sought to compare the push-out bond strength of two bulk-fill and one conventional composite to intracanal dentin in primary anterior teeth. MATERIALS AND METHODS: This in vitro, experimental study was conducted on 39 primary anterior teeth, which were randomly divided into three groups. After cleaning and shaping, the root canals were filled with Metapex in such a way that after the application of 1mm light-cure liner on top of it, the coronal 3mm of the canal remained empty for composite post space...
June 2016: Journal of Dentistry of Tehran University of Medical Sciences
https://www.readbyqxmd.com/read/28362112/the-role-of-non-fat-ingredients-on-confectionery-fat-crystallization
#8
Ryan West, Dérick Rousseau
Confections such as chocolate and biscuit fillings are composed of a continuous fat phase that contains dispersed non-fat ingredients such as sugar and cocoa powder. Research on fat crystallization and rheology in confections often extrapolates crystallization and textural properties from bulk to mixed systems while overlooking the important role of composition or particle interactions. For example, in chocolate processing the fat phase aids dispersed phase lubrication and fluidity whereas the dispersed particles assist in fat crystallization by providing many nucleation sites...
March 31, 2017: Critical Reviews in Food Science and Nutrition
https://www.readbyqxmd.com/read/28298988/bond-strength-of-dental-nanocomposites-repaired-with-a-bulkfill-composite
#9
Uzay Koç-Vural, Leyla Kerimova, İsmail H Baltacioglu, Arlin Kiremitçi
BACKGROUND: The aim of this study was to analyze the bond strength of aged resin based nanocomposites repaired with the same and bulk fill composites. MATERIAL AND METHODS: Seventy-two disc shaped resin composites consisted of three different nanocomposite resins (Filtek Ultimate/FU, Herculite XRV Ultra/HXRV, and Reflectys/R) were produced. After storing the samples for 8 weeks in distilled water, each material was combined with the same material or the bulk-fill composite resin system (Filtek Ultimate+Filtek Ultimate/Group-1; Filtek Ultimate+Tetric BF/Group-2; Herculite XRV+Herculite XRV/Group-3; Herculite XRV+Tetric BF/ Group-4; Reflectys+Reflectys/Group 5; Reflectys+Tetric BF/Group-6), for repair...
March 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28297870/dynamics-of-field-driven-population-inversion-in-a-confined-colloidal-mixture
#10
S Chung, S Samin, C Holm, J G Malherbe, S Amokrane
We study, using Langevin dynamics simulations, the change in composition of a binary colloidal mixture confined in a finite-length channel, induced by an external field. The field-induced transition from a near-bulk composition to an inverted population is studied as a function of time, for different field strengths and system parameters. For state points corresponding to reversible field cycles, the cyclic filling and emptying of the channel by the minority species are compared. Extrapolation of the physical relaxation times to the colloidal regime is performed through a series of simulations at increasing value of the damping parameter...
February 2017: Physical Review. E
https://www.readbyqxmd.com/read/28281590/bulk-fill-resin-based-composite-restorative-materials-a-review
#11
J Chesterman, A Jowett, A Gallacher, P Nixon
Resin-based composite (RBC) materials are increasingly being used for the restoration of posterior teeth. The increasing demand for aesthetic, tooth-coloured restorations coupled with the patient's concerns regarding the use of mercury containing restorations, has driven a surge in the use of RBC materials. With the Minamata Convention in 2013 calling for the phase-out of dental amalgam and dental schools increasingly teaching techniques for RBC restorations in posterior teeth, it is likely that the dental profession's reliance upon RBC for the restoration of posterior teeth will only increase...
March 10, 2017: British Dental Journal
https://www.readbyqxmd.com/read/28275276/long-term-degree-of-conversion-of-two-bulk-fill-composites
#12
Matej Par, Matea Lapas-Barisic, Ozren Gamulin, Vlatko Panduric, Nika Spanovic, Zrinka Tarle
OBJECTIVES: To investigate the long-term development of the post-cure degree of conversion (DC) for two flowable bulk-fill composites. MATERIALS AND METHODS: Tetric EvoFlow Bulk Fill (TEFBF) and SDR were chosen due to their distinct compositional modifications that enable the decrease of translucency during polymerization and lower polymerization rate, respectively. DC was assessed using FT-Raman spectroscopy at the post-cure times of 0 h, 24 h, 7 d and 30 d. The post-cure behavior was analyzed by a mixed model ANOVA and partial eta-squared statistics...
December 2016: Acta Stomatologica Croatica
https://www.readbyqxmd.com/read/28260947/the-effect-of-curing-intensity-on-mechanical-properties-of-different-bulk-fill-composite-resins
#13
Fahad I Alkhudhairy
OBJECTIVE: The purpose of this study was to investigate the effects of two curing light intensities on the mechanical properties (Vickers microhardness, compressive strength, and diametral tensile strength) of bulk-fill resin-based composites (RBCs). MATERIALS AND METHODS: Four commercially available bulk-fill RBCs (Tetric(®) N-Ceram, SonicFill™, Smart Dentin Replacement (SDR™) Posterior Flowable Material, and Filtek™ Posterior Restorative) were used in this study...
2017: Clinical, Cosmetic and Investigational Dentistry
https://www.readbyqxmd.com/read/28244733/addressing-the-interface-issues-in-all-solid-state-bulk-type-lithium-ion-battery-via-an-all-composite-approach
#14
Ru-Jun Chen, Yi-Bo Zhang, Ting Liu, Bing-Qing Xu, Yuan-Hua Lin, Ce-Wen Nan, Yang Shen
All-solid-state bulk-type lithium ion batteries (LIBs) are considered ultimate solutions to the safety issues associated with conventional LIBs using flammable liquid electrolyte. The development of bulk-type all-solid-state LIBs has been hindered by the low loading of active cathode materials, hence low specific surface capacity, and by the high interface resistance, which results in low rate and cyclic performance. In this contribution, we propose and demonstrate a synergistic all-composite approach to fabricating flexible all-solid-state LIBs...
March 22, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28210447/the-effect-of-different-insertion-techniques-on-the-depth-of-cure-and-vickers-surface-micro-hardness-of-two-bulk-fill-resin-composite-materials
#15
Lamiaa-Mahmoud Moharam, Ahmed-Zohair El-Hoshy, Karim Abou-Elenein
BACKGROUND: The aim of this study was to evaluate the Vickers surface micro-hardness and the depth of cure of two bulk-fill resin composites and one incremental-fill resin composite. MATERIAL AND METHODS: Two Bulk-fill dental resin composites (X-tra Fil, Voco; Sonic-FillTM 2, Kerr Corporation) and an incremental-fill dental resin composite (Filtek™ Z250 XT, 3M ESPE) were used. Sixty cylindrical specimens of 4 mm thickness were prepared using split Teflon moulds...
February 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28160094/marginal-adaptation-and-microleakage-of-a-bulk-fill-composite-resin-photopolymerized-with-different-techniques
#16
Vania Stephanie Sánchez Gamarra, Gilberto Antonio Borges, Luiz Henrique Burnett Júnior, Ana Maria Spohr
The purpose of this study was to investigate the marginal adaptation and microleakage of SonicFill composite with different photopolymerization techniques. Class II cavities were prepared in 40 premolars and divided into groups according to the photopolymerization technique (n = 10): G1:1200 mW/cm(2) for 20 s; G2:1200 mW/cm(2) for 40 s; G3:Soft-start with 650 mW/cm(2) for 5 s and 1200 mW/cm(2) for 15 s; G4:Soft-start with 650 mW/cm(2) for 10 s and 1200 mW/cm(2) for 30 s. The cavities were restored with OptiBond FL adhesive and SonicFill...
February 3, 2017: Odontology
https://www.readbyqxmd.com/read/28154317/depth-of-cure-flexural-properties-and-volumetric-shrinkage-of-low-and-high-viscosity-bulk-fill-giomers-and-resin-composites
#17
Akimasa Tsujimoto, Wayne W Barkmeier, Toshiki Takamizawa, Mark A Latta, Masashi Miyazaki
The purpose of this study was to investigate the depth of cure, flexural properties and volumetric shrinkage of low and high viscosity bulk-fill giomers and resin composites. Depth of cure and flexural properties were determined according to ISO 4049, and volumetric shrinkage was measured using a dilatometer. The depths of cure of giomers were significantly lower than those of resin composites, regardless of photo polymerization times. No difference in flexural strength and modulus was found among either high or low viscosity bulk fill materials...
March 31, 2017: Dental Materials Journal
https://www.readbyqxmd.com/read/28138674/enhanced-photovoltaic-performance-of-polymer-filled-nanoporous-si-hybrid-structures
#18
Minjae Gang, Joo-Hyoung Lee
We propose a novel hybrid structure for improving the efficiency of crystalline silicon solar cells. By employing first-principles calculations, we demonstrate that ordered, nanoporous silicon (np-Si), when filled with polythiophene (PT) inside the pores, exhibits a substantially enhanced absorption coefficient compared to both np-Si and the bulk, which makes the np-Si/PT heterojunction a superior light absorbing material. In addition, the PT-filled porous structure forms a staggered gap, or type II, heterojunction at the interfaces, where the valence band maximum and conduction band minimum of the composite reside on PT and np-Si, respectively...
January 31, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28100492/dynamic-assembly-of-ultrasoft-colloidal-networks-enables-cell-invasion-within-restrictive-fibrillar-polymers
#19
Alison M Douglas, Alexandros A Fragkopoulos, Michelle K Gaines, L Andrew Lyon, Alberto Fernandez-Nieves, Thomas H Barker
In regenerative medicine, natural protein-based polymers offer enhanced endogenous bioactivity and potential for seamless integration with tissue, yet form weak hydrogels that lack the physical robustness required for surgical manipulation, making them difficult to apply in practice. The use of higher concentrations of protein, exogenous cross-linkers, and blending synthetic polymers has all been applied to form more mechanically robust networks. Each relies on generating a smaller network mesh size, which increases the elastic modulus and robustness, but critically inhibits cell spreading and migration, hampering tissue regeneration...
January 31, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28091437/radiopacity-of-bulk-fill-flowable-resin-composite-materials
#20
T Yildirim, M K Ayar, M S Akdag, C Yesilyurt
OBJECTIVES: The purpose of this study was to evaluate the radiopacity of currently marketed bulk fill flowable dental composite materials (Beautifil Bulk Flowable, SDR Flow, Filtek Bulk Fill Flow, and x-tra Base Bulk Fill). MATERIALS AND METHODS: Six specimens of each material with a thickness of 1 mm were prepared, and digital radiographs were taken, using a CCD sensor along with an aluminum stepwedge and 1 mm-thick tooth slice. The mean gray level of each aluminum stepwedge and selected materials was measured, using the equal-density area tool of Kodak Dental Imaging software...
February 2017: Nigerian Journal of Clinical Practice
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