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Bulk fill composites

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https://www.readbyqxmd.com/read/28298988/bond-strength-of-dental-nanocomposites-repaired-with-a-bulkfill-composite
#1
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
#2
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
#3
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
#4
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
#5
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
#6
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
#7
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
#8
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
#9
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...
February 1, 2017: Dental Materials Journal
https://www.readbyqxmd.com/read/28138674/enhanced-photovoltaic-performance-of-polymer-filled-nanoporous-si-hybrid-structures
#10
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
#11
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
#12
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
https://www.readbyqxmd.com/read/28090033/the-effect-of-surface-sealant-application-and-accelerated-aging-on-posterior-restorative-surfaces-an-sem-and-afm-study
#13
Neslihan Tekçe, Kanşad Pala, Safa Tuncer, Mustafa Demirci
The purpose of this study was to evaluate the effect of surface sealant application and 10,000 thermocycles on the surface roughness and microhardness of different resin composite systems. A micro-hybrid (G Aenial Posterior), a nano-hybrid (Clearfil Majesty Posterior), a nano-fill (Filtek Ultimate Universal Restorative, Enamel Shade), and a bulk-fill resin composite (Filtek Bulk Fill Posterior Restorative) were used for the study. Specimens were evaluated at 24 h, after application of the surface sealant Fortify Plus, and after thermocycling...
January 13, 2017: Dental Materials Journal
https://www.readbyqxmd.com/read/28088459/strain-development-in-bulk-filled-cavities-of-different-depths-characterized-using-a-non-destructive-acoustic-emission-approach
#14
Annelies Van Ende, Diogo Pedrollo Lise, Jan De Munck, Johan Vanhulst, Martine Wevers, Bart Van Meerbeek
OBJECTIVES: (1) To evaluate the effect of cavity depth and composite type on the interfacial debonding in bulk-filled cavities. (2) To correlate the theoretical shrinkage stress and the level of interfacial debonding determined by acoustic emission (AE). METHODS: 80 sound molars were divided in two groups to receive a Class-I cavity (3.5×3.5mm) with 2.5- or 4.0-mm depth. The cavities were restored with either a conventional paste-like (Filtek Z100, 3M ESPE), a conventional flowable (G-ænial Universal Flo, GC), a bulk-fill paste-like (Tetric EvoCeram Bulk Fill, Ivoclar Vivadent) or a bulk-fill flowable (SDR, Dentsply) composite (n=10)...
January 11, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28050983/wear-resistance-of-bulk-fill-composite-resin-restorative-materials-polymerized-under-different-curing-intensities
#15
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/28011129/fast-and-sensitive-in-vivo-studies-under-controlled-environmental-conditions-to-substitute-long-term-field-trials-with-genetically-modified-plants
#16
Patricia Horn, André Schlichting, Christel Baum, Ute Hammesfahr, Sören Thiele-Bruhn, Peter Leinweber, Inge Broer
We introduce an easy, fast and effective method to analyze the influence of genetically modified (GM) plants on soil and model organisms in the laboratory to substitute laborious and time consuming field trials. For the studies described here we focused on two GM plants of the so-called 3rd generation: GM plants producing pharmaceuticals (PMP) and plant made industrials (PMI). Cyanophycin synthetase (cphA) was chosen as model for PMI and Choleratoxin B (CTB) as model for PMP. The model genes are expressed in transgenic roots of composite Vicia hirsuta plants grown in petri dishes for semi-sterile growth or small containers filled with non-sterile soil...
February 10, 2017: Journal of Biotechnology
https://www.readbyqxmd.com/read/28002693/degree-of-conversion-and-polymerization-shrinkage-of-bulk-fill-resin-based-composites
#17
P Yu, Auj Yap, X Y Wang
This study evaluated the degree of conversion (DC) and polymerization shrinkage (PS) of contemporary bulk-fill resin-based composites (RBCs) including giomer materials. Two giomer bulk-fill (Beautifil Bulk Restorative [BBR], Beautifil Bulk Flowable [BBF]), two nongiomer bulk-fill (Tetric N-Ceram Bulk-fill [TNB], Smart Dentin Replacement [SDR]), and three conventional non-bulk-fill (Beautifil II [BT], Beautifil Flow Plus [BF], Tetric N-Ceram [TN]) RBCs were selected for the study. To evaluate the DC, disc-shaped specimens of 5-mm diameter and 2-mm, 4-mm, and 6-mm thickness were fabricated using customized Teflon molds...
January 2017: Operative Dentistry
https://www.readbyqxmd.com/read/27994314/comparative-evaluation-of-the-microtensile-bond-strength-of-bulk-fill-and-low-shrinkage-composite-for-different-depths-of-class-ii-cavities-with-the-cervical-margin-in-cementum-an-in-vitro-study
#18
Sonali Taneja, Pragya Kumar, Avnish Kumar
AIM: The aim of this study was to evaluate the microtensile bond strength (μTBS) of bulk fill and low shrinkage composite for different depths of Class II cavities with the cervical margin in cementum. MATERIALS AND METHODS: Standardized conservative box-shaped Class II cavities were prepared on sixty sound-impacted human third molars. The samples were randomly divided into two groups: Group I (n = 30) - horizontal incremental technique and Group II (n = 30) - bulk fill technique (SonicFill)...
November 2016: Journal of Conservative Dentistry: JCD
https://www.readbyqxmd.com/read/27965486/comparison-of-shear-bond-strength-and-microleakage-of-various-bulk-fill-bioactive-dentin-substitutes-an-in-vitro-study
#19
Fahad I Alkhudhairy, Zeeshan H Ahmad
INTRODUCTION: Various bulk-fill materials depending on their composition, viscosity, and flow ability have different physical and mechanical properties. The aim of this in vitro study was to determine and compare the shear bond strength and microleakage properties of activa restorative with other bulk-fill restorative materials surefil (SDR), Biodentine, ever X posterior. MATERIALS AND METHODS: Forty permanent premolars were selected for shear bond strength, and 20 permanent premolars were selected with class II cavities on mesial and distal side for microleakage...
December 1, 2016: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/27957266/dynamic-thermo-mechanical-properties-of-various-flowable-resin-composites
#20
Stéphanie Jager, Rémy Balthazard, Marin Vincent, Abdessellam Dahoun, Eric Mortier
BACKGROUND: This study compared the storage modulus (E'), the loss modulus (E'') and the loss tangent (tan δ) of various flowable resin composites. MATERIAL AND METHODS: Grandio Flow (GRF), GrandioSo Heavy Flow (GHF), Filtek Supreme XTE (XTE) and Filtek Bulk Fill (BUL) flowable resins and Clinpro Sealant (CLI) ultra-flowable pit and fissure sealant resin were used. 25 samples were tested using a dynamical mechanical thermal analysis system in bending mode. Measurements were taken within a temperature range of 10 to 55°C...
December 2016: Journal of Clinical and Experimental Dentistry
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