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Bulk fill composites

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https://www.readbyqxmd.com/read/28791976/a-prospective-randomized-double-blind-clinical-trial-of-one-nano-hybrid-and-one-high-viscosity-bulk-fill-composite-restorative-systems-in-class-ii-cavities-12-months-results
#1
H Colak, U Tokay, R Uzgur, M M Hamidi, E Ercan
BACKGROUND: Recently, manufacturers have introduced bulk-fill composite resins that reportedly can be placed in increments of 4 mm or greater. OBJECTIVE: The purpose of this article was to report the results of 12 months prospective randomized clinical trial that evaluated the clinical performance of one high-viscosity bulk-fill composite resin in Class II cavities of posterior teeth. MATERIALS AND METHODS: Thirty-four participantshad at least two Class II cavities included the study...
July 2017: Nigerian Journal of Clinical Practice
https://www.readbyqxmd.com/read/28791970/leakage-testing-for-different-adhesive-systems-and-composites-to-permanent-teeth
#2
B S Bolgul, B Ayna, I Simsek, S Celenk, O Seker, G Kilinc
AIM: To explore the microleakage of different adhesive systems and flowable composites to permanent teeth. SUBJECTS AND METHODS: In this study, a total of 84 human premolar teeth were used. Class V cavities were prepared on the buccal surfaces. The teeth were randomly assigned to six groups of 14 teeth each as follows: The first group - etch-rinse adhesive applied and cavities filled with flowable composite, the second group - etch-rinse adhesive applied and cavities filled with bulk-fill resin composite, the third group - one-stage self-etch (SE) adhesive applied and cavities filled with flowable composite, the fourth group - one-stage SE adhesive applied and cavities filled with bulk-fill resin composite, the fifth group - two-stage SE adhesive applied and cavities filled with flowable composite, and the sixth group - two-stage SE adhesive applied and cavities filled with bulk-fill resin composite...
July 2017: Nigerian Journal of Clinical Practice
https://www.readbyqxmd.com/read/28773812/effect-of-guest-atom-composition-on-the-structural-and-vibrational-properties-of-the-type-ii-clathrate-based-materials-axsi136-axge136-and-axsn136-a-na-k-rb-cs-0-%C3%A2-x-%C3%A2-24
#3
Dong Xue, Charles W Myles, Craig Higgins
Type II clathrates are interesting due to their potential thermoelectric applications. Powdered X-ray diffraction (XRD) data and density functional calculations for NaxSi136 found a lattice contraction as x increases for 0 < x < 8 and an expansion as x increases for x > 8. This is explained by XRD data that shows that as x increases, the Si28 cages are filled first for x < 8 and the Si20 cages are then filled for x > 8. Motivated by this work, here we report the results of first-principles calculations of the structural and vibrational properties of the Type II clathrate compounds AxSi136, AxGe136, and AxSn136...
August 11, 2016: Materials
https://www.readbyqxmd.com/read/28764288/evaluating-the-marginal-integrity-of-bulk-fill-fibre-reinforced-composites-in-bio-mimetically-restored-tooth
#4
Arun Kumar Patnana, V Narsimha Rao Vanga, Srinivas Kumar Chandrabhatla
INTRODUCTION: Over the past years, composites in aesthetic dentistry are showing a considerable progress, but mechanical strength and polymerization shrinkage are the two main drawbacks, which limit their use in high stress bearing areas. AIM: To evaluate the marginal integrity of short glass fibre reinforced composite restorations, fibre reinforced composites with composite superficial layer, and fibre reinforced composites with underlying flowable composite layer...
June 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28762350/comparative-evaluation-of-microleakage-between-bulk-esthetic-materials-versus-resin-modified-glass-ionomer-to-restore-class-ii-cavities-in-primary-molars
#5
Vellore Kannan Gopinath
AIM: The aim of the study was to assess the microleakage of one high-viscosity conventional glass ionomer cement (GIC) and a bulk-fill composite resin, in comparison to a resin-modified GIC in Class II restorations in primary molars. MATERIALS AND METHOD: Standardized Class II slot cavity preparations were prepared in exfoliating primary molars. Teeth were restored using one of the three materials tested (n = 10): SonicFill bulk-fill composite resin (SF), EQUIA Fil conventional reinforced GIC (EQF), and Vitremer resin-reinforced GIC (VT)...
July 2017: Journal of the Indian Society of Pedodontics and Preventive Dentistry
https://www.readbyqxmd.com/read/28760330/thermographic-analysis-of-the-effect-of-composite-type-layering-method-and-curing-light-on-the-temperature-rise-of-photo-cured-composites-in-tooth-cavities
#6
Min-Jung Kim, Ryan Jin-Young Kim, Jack Ferracane, In-Bog Lee
OBJECTIVES: The purpose of this study was to investigate temperature rise in the composite and dentin of a class I cavity in extracted human molars under different restoration conditions, including the use of different composite types, layering methods, and curing lights. METHODS: Open occlusal cavities were prepared on 28 extracted human molars. A conventional (Filtek Z250) and a bulk-fill (Filtek Bulk Fill Posterior; BFP) composite were used to restore the preparations...
July 28, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28755910/reprint-of-fast-and-sensitive-in-vivo-studies-under-controlled-environmental-conditions-to-substitute-long-term-field-trials-with-genetically-modified-plants
#7
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...
July 26, 2017: Journal of Biotechnology
https://www.readbyqxmd.com/read/28750776/in-vitro-biofilm-formation-on-resin-based-composites-after-different-finishing-and-polishing-procedures
#8
Gloria Cazzaniga, Marco Ottobelli, Andrei C Ionescu, Gaetano Paolone, Enrico Gherlone, Jack L Ferracane, Eugenio Brambilla
OBJECTIVES: To evaluate the influence of surface treatments of different resin-based composites (RBCs) on S. mutans biofilm formation. METHODS: 4 RBCs (microhybrid, nanohybrid, nanofilled, bulk-filled) and 6 finishing-polishing (F/P) procedures (open-air light-curing, light-curing against Mylar strip, aluminum oxide discs, one-step rubber point, diamond bur, multi-blade carbide bur) were evaluated. Surface roughness (SR) (n=5/group), gloss (n=5/group), scanning electron microscopy morphological analysis (SEM), energy-dispersive X-ray spectrometry (EDS) (n=3/group), and S...
July 24, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28748051/factors-affecting-marginal-integrity-of-class-ii-bulk-fill-composite-resin-restorations
#9
Siavash Savadi Oskoee, Mahmoud Bahari, Elmira Jafari Navimipour, Amir Ahmad Ajami, Negar Ghiasvand, Ayda Savadi Oskoee
Background. Bulk-fill composite resins are a new type of resin-based composite resins, claimed to have the capacity to be placed in thick layers, up to 4 mm. This study was carried out to evaluate factors affecting gap formation in Cl II cavities restored using the bulk-fill technique. Methods. A total of 60 third molars were used in this study. Two Cl II cavities were prepared in each tooth, one on the mesial aspect 1 mm coronal to the CEJ and one on the distal aspect 1 mm apical to the CEJ. The teeth were divided into 4 groups: A: The cavities were restored using the bulk-fill technique with Filtek P90 composite resin and its adhesive system and light-cured with quartz tungsten halogen (QTH) light-curing unit...
2017: Journal of Dental Research, Dental Clinics, Dental Prospects
https://www.readbyqxmd.com/read/28721100/shear-bond-strength-of-different-surface-treatments-in-bulk-fill-microhybrid-and-nanoparticle-repair-resins
#10
Rudys Rodolfo de Jesus Tavarez, Lauber Jose Dos Santos Almeida Júnior, Tayanne Christine Gomes Guará, Izabella Santos Ribeiro, Etevaldo Matos Maia Filho, Leily Macedo Firoozmand
OBJECTIVES: The purpose of this study was to evaluate the influence of surface treatment and different types of composite resin on the microshear bond strength of repairs. MATERIALS AND METHODS: Seventy-two specimens (n=72) were prepared using a nanoparticle resin and stored in artificial saliva at 37 ± 1°C for 24 h. After this period, the specimens (n=24) were restored with microhybrid resin P60 (3M ESPE), nanoparticle resin Filtek Z350 (3M ESPE), and Bulk Fill Surefil SDR Flow (Dentsply) composite resins...
2017: Clinical, Cosmetic and Investigational Dentistry
https://www.readbyqxmd.com/read/28690967/synthesis-of-fe-leq-lax-n-coordination-polymer-nanoparticles-using-blockcopolymer-micelles
#11
Christoph Göbel, Ottokar Klimm, Florian Puchtler, Sabine Rosenfeldt, Stephan Förster, Birgit Weber
Spin-crossover compounds are a class of materials that can change their spin state from high spin (HS) to low spin (LS) by external stimuli such as light, pressure or temperature. Applications demand compounds with defined properties concerning the size and switchability that are maintained when the compound is integrated into composite materials. Here, we report the synthesis of [Fe(Leq)(Lax)]n coordination polymer (CP) nanoparticles using self-assembled polystyrene-block-poly(4-vinylpyridine) (PS-b-P4VP) block copolymer (BCP) micelles as template...
2017: Beilstein Journal of Nanotechnology
https://www.readbyqxmd.com/read/28688735/implications-of-resin-based-composite-rbc-restoration-on-cuspal-deflection-and-microleakage-score-in-molar-teeth-placement-protocol-and-restorative-material
#12
Lauren E J McHugh, Ioanna Politi, Rami S Al-Fodeh, Garry J P Fleming
OBJECTIVE: To assess the cuspal deflection of standardised large mesio-occluso-distal (MOD) cavities in third molar teeth restored using conventional resin-based composite (RBC) or their bulk fill restorative counterparts compared with the unbound condition using a twin channel deflection measuring gauge. Following thermocycling, the cervical microleakage of the restored teeth was assessed to determine marginal integrity. METHODS: Standardised MOD cavities were prepared in forty-eight sound third molar teeth and randomly allocated to six groups...
July 5, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28684960/effect-of-mouthwashes-on-solubility-and-sorption-of-restorative-composites
#13
José Pereira Leal, Jaqueline Damasceno da Silva, Rafaelle Fernanda Melão Leal, Carlos da Cunha Oliveira-Júnior, Vera Lúcia Gomes Prado, Glauber Campos Vale
OBJECTIVE: Composites sorption and solubility can be precursors of several chemical and physical processes, which lead to deleterious effects on the polymer structure. This study evaluated the effect of mouthwashes on solubility and sorption of composite resins. MATERIALS AND METHODS: Forty-two specimens of each evaluated composite (Filtek Bulk Fill Flow, Opallis Flow, Durafill VS, and Filtek Z350) were prepared and randomized into seven groups for each solution (mouth rinses with and without alcohol and distilled water) and stored for seven days...
2017: International Journal of Dentistry
https://www.readbyqxmd.com/read/28662878/bonding-over-dentin-replacement-materials
#14
Naghmeh Meraji, Josette Camilleri
INTRODUCTION: Dentin replacement materials are necessary in large cavities to protect the pulp and reduce the bulk of filling material. These materials are layered with a composite resin restorative material. Microleakage caused by poor bonding of composite resin to underlying dentin replacement material will result in pulp damage. The aim of this study was to characterize the interface between dentin replacement materials and composite resin and to measure the shear bond strength after dynamic aging...
August 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28652817/effect-of-preheating-and-light-curing-unit-on-physicochemical-properties-of-a-bulk-fill-composite
#15
Jéssica Dias Theobaldo, Flávio Henrique Baggio Aguiar, Núbia Inocencya Pavesi Pini, Débora Alves Nunes Leite Lima, Priscila Christiane Suzy Liporoni, Anderson Catelan
OBJECTIVE: The aim of this study is to evaluate the effect of composite preheating and polymerization mode on degree of conversion (DC), microhardness (KHN), plasticization (P), and depth of polymerization (DP) of a bulk fill composite. METHODS: Forty disc-shaped samples (n = 5) of a bulk fill composite were prepared (5 × 4 mm thick) and randomly divided into 4 groups according to light-curing unit (quartz-tungsten-halogen [QTH] or light-emitting diode [LED]) and preheating temperature (23 or 54 °C)...
2017: Clinical, Cosmetic and Investigational Dentistry
https://www.readbyqxmd.com/read/28652556/characteristics-of-low-polymerization-shrinkage-flowable-resin-composites-in-newly-developed-cavity-base-materials-for-bulk-filling-technique
#16
Keiko Nitta, Rie Nomoto, Yuji Tsubota, Masuji Tsuchikawa, Tohru Hayakawa
The purpose of this study was to evaluate polymerization shrinkage and other physical properties of newly-developed cavity base materials for bulk filling technique, with the brand name BULK BASE (BBS). Polymerization shrinkage was measured according to ISO/FDIS 17304. BBS showed the significantly lowest polymerization shrinkage and significantly higher depth of cure than conventional flowable resin composites (p<0.05). The Knoop hardness, flexural strength and elastic modulus of that were significantly lower than conventional flowable resin composites (p<0...
June 23, 2017: Dental Materials Journal
https://www.readbyqxmd.com/read/28626204/intrapulpal-temperature-changes-during-curing-of-different-bulk-fill-restorative-materials
#17
Elif Yasa, Cigdem Atalayin, Gamze Karacolak, Tugrul Sari, L Sebnem Turkun
The aim of this study was to evaluate the intrapulpal temperature changes during the curing of different bulk-fill restorative materials. Ten mandibular molar teeth were selected and occlusal surfaces were removed to obtain a standard 0.5 mm occlusal dentin thickness. Five bulk-fill restorative materials and a conventional resin composite (control) were applied. The intrapulpal temperature changes during the curing of these materials were determined by a device simulating pulpal blood microcirculation. The difference between the initial and maximum temperature values (Δt), was recorded...
June 15, 2017: Dental Materials Journal
https://www.readbyqxmd.com/read/28605721/dynamic-analysis-of-bulk-fill-composites-effect-of-food-simulating-liquids
#18
Ahmed Hesham Eweis, Adrian U-Jin Yap, Noor Azlin Yahya
This study investigated the effect of food simulating liquids on visco-elastic properties of bulk-fill restoratives using dynamic mechanical analysis. One conventional composite (Filtek Z350 [FZ]), two bulk-fill composites (Filtek Bulk-fill [FB] and Tetric N Ceram [TN]) and a bulk-fill giomer (Beautifil-Bulk Restorative [BB]) were evaluated. Specimens (12 × 2 × 2mm) were fabricated using customized stainless steel molds. The specimens were light-cured, removed from their molds, finished, measured and randomly divided into six groups...
June 6, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28605610/effect-of-light-curing-exposure-time-shade-and-thickness-on-the-depth-of-cure-of-bulk-fill-composites
#19
A Rodriguez, P Yaman, J Dennison, D Garcia
PURPOSE:   To investigate the effect of different light exposure times, shades, and thicknesses on the depth of cure (DOC) of bulk fill composites. METHODS AND MATERIALS:   Two bulk fill composites, Tetric EvoCeram Bulk Fill (TBF) and Sonic Fill (SF), and a conventional composite, Filtek Supreme Ultra (FSU), were evaluated. Samples (n=10) were made using two different shades (light and dark), thicknesses (2 and 4 mm) and exposure times (20 and 40 seconds). A Tukon 2100B-testing machine was used to obtain three Knoop hardness numbers (KHNs) measured at the top and bottom of each sample, and DOC was calculated as the bottom/top ratio...
June 12, 2017: Operative Dentistry
https://www.readbyqxmd.com/read/28584779/evaluation-of-surface-roughness-of-different-direct-resin-based-composites
#20
Nashaat Mohammed Magdy, Mohammed Zaheer Kola, Hamod Hussain Alqahtani, Mubarak Daghash Alqahtani, Abdullah Saud Alghmlas
AIMS AND OBJECTIVE: To evaluate surface roughness of different resin-based composites. MATERIALS AND METHODS: Three resin composites, one nanohybrid, one nanoceramic, and one bulk-fill resin-based composite, were used in this study. Cylindrical Teflon mold and 8 mm in diameter and 2 mm in thickness disc specimens were prepared. For each composite material, 15 discs were fabricated, with a total of sixty discs were obtained (n = 60). A glass slide 1-2 mm thick was placed over the strip before curing with the light-curing unit to flatten the surfaces...
May 2017: Journal of International Society of Preventive & Community Dentistry
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