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https://www.readbyqxmd.com/read/28327302/effect-of-monomer-blend-and-chlorhexidine-adding-on-physical-mechanical-and-biological-properties-of-experimental-infiltrants
#1
Luciana Tiemi Inagaki, Roberta Caroline Bruschi Alonso, Giovana Albamonte Spagnolo Araújo, Eduardo José Carvalho de Souza-Junior, Paula Cristina Anibal, José Francisco Höfling, Fernanda Miori Pascon, Regina Maria Puppin-Rontani
OBJECTIVES: The aim of the study was to evaluate antimicrobial inhibition zone, degree of conversion (DC) and Knoop hardness (KH) of experimental infiltrants. Experimental low viscosity monomer blends were prepared and chlorhexidine diacetate salt (CHX) (0.1% or 0.2%) was added comprising the groups: G1) TEGDMA; G2) TEGDMA/0.1CHX; G3) TEGDMA/0.2CHX; G4) TEGDMA/UDMA; G5) TEGDMA/UDMA/0.1CHX; G6) TEGDMA/UDMA/0.2CHX; G7) TEGDMA/BISEMA; G8) TEGDMA/BISEMA/0.1CHX; G9) TEGDMA/BISEMA/0.2CHX. Icon(®) was used as control group...
December 2016: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28327301/dentin-bond-optimization-using-the-dimethyl-sulfoxide-wet-bonding-strategy-a-2-year-in-vitro-study
#2
Thiago Henrique Scarabello Stape, Leo Tjäderhane, Arzu Tezvergil-Mutluay, Cristiane Rumi Fujiwara Yanikian, Anna Luiza Szesz, Alessandro Dourado Loguercio, Luís Roberto Marcondes Martins
OBJECTIVE: This study evaluated a new approach, named dimethyl sulfoxide (DMSO)-wet bonding, to produce more desirable long-term prospects for the ultrafine interactions between synthetic polymeric biomaterials and the inherently hydrated dentin substrate. METHODS: Sound third molars were randomly restored with/without DMSO pretreatment using a total-etch (Scocthbond Multipurpose: SBMP) and a self-etch (Clearfil SE Bond: CF) adhesive systems. Restored teeth (n=10)/group were sectioned into sticks and submitted to different analyses: micro-Raman determined the degree of conversion inside the hybrid layer (DC); resin-dentin microtensile bond strength and fracture pattern analysis at 24h, 1year and 2 years of aging; and nanoleakage evaluation at 24h and 2 years...
December 2016: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28326734/-research-on-bond-durability-among-different-core-materials-and-zirconia-ceramic-cemented-by-self-adhesive-resin-cements
#3
Luo Xinyu, Meng Xiangfeng
OBJECTIVE: This research estimated shear bond durability of zirconia and different substrates cemented by two self-adhesive resin cements (Clearfil SA Luting and RelyX U100) before and after aging conditioning. METHODS: Machined zirconia ceramic discs were cemented with four kinds of core material (cobalt-chromium alloy, flowable composite resin core material, packable composite resin, and dentin) with two self-adhesive resin cements (Clearfil SA Luting and RelyX U100)...
February 1, 2017: Hua Xi Kou Qiang Yi Xue za Zhi, Huaxi Kouqiang Yixue Zazhi, West China Journal of Stomatology
https://www.readbyqxmd.com/read/28326726/-effects-of-different-surface-modifications-on-micro-structure-and-adhesion-of-zirconia-ceramic-an-in-vitro-study
#4
Li Siwen, Li Shishi, Wang Yanhong, Ma Hongmei
OBJECTIVE: This study evaluated the effect of different mechanical-chemical surface treatments on the characteristics, microstructure, and composition of zirconia ceramics and on the zirconia-dentin adhesion. METHODS: The sintered commercial zirconia blocks (IPS e.max ZirCAD) were sectioned into 126 beams (6 mm×6 mm×5 mm) and randomly assigned to seven experimental groups (n=18). The zirconia block specimens were further treated as follows: (A) untreated, as control; (B) sandblasted with 50 μm Al2O3; (C) sandblasted with 50 μm Al2O3+30 μm silica powder; (D) sandblasted with 50 μm Al2O3+30% silica-sol coating; (E) sandblasted with 110 μm Al2O3; (F) sandblasted with 110 μm Al2O3+30 μm silica powder; and (G) sandblasted with 110 μm Al2O3+30% silica-sol coating...
February 1, 2017: Hua Xi Kou Qiang Yi Xue za Zhi, Huaxi Kouqiang Yixue Zazhi, West China Journal of Stomatology
https://www.readbyqxmd.com/read/28326699/-influence-of-surface-roughness-on-oral-streptococcal-adhesion-forces-to-dental-filling-materials
#5
Zheng Sainan, Jiang Li, Zhang Lei, Hao Liying, Ye Lu, Li Wei
OBJECTIVE: This study is to determine the common oral streptococcal adhesion forces by using composite resin and glass ionomer cement (GIC) with different degrees of surface roughness via atomic force microscopy (AFM) analysis. The influence of surface roughness on bacterial adhesion force is also discussed. METHODS: Polishing and grinding were applied to obtain 300, 200, 100, and 10 nm surfaces of light-cured composite resin and GIC samples. Surface topography was assessed by AFM analysis...
October 1, 2016: Hua Xi Kou Qiang Yi Xue za Zhi, Huaxi Kouqiang Yixue Zazhi, West China Journal of Stomatology
https://www.readbyqxmd.com/read/28322603/bond-strength-of-abraded-and-non-abraded-bleached-enamel-to-resin-after-er-cr-ysgg-laser-irradiation
#6
Pedro H C Oliveira, Alessandra Cassoni, Aldo Brugnera, Ilana P Tenório, José A Rodrigues
OBJECTIVE: The objective of the study was to evaluate the microtensile bond strength (μTBS) of a composite resin to abraded or non-abraded bleached enamel after Er,Cr:YSGG laser irradiation and to observe the fracture patterns of the tested interfaces. MATERIALS AND METHODS: Two hundred twenty-eight bovine incisors were sectioned, resulting in 228 enamel blocks (7 × 4 × 4 mm(3)) that were divided into 12 groups (n = 19) according to the factors "adhesion" after bleaching (immediate adhesion; after 14 days; and a control group with adhesion on unbleached teeth); enamel "abrasion" (with or without abrasion simulating cavity preparation); and "laser" (with or without Er,Cr:YSGG laser irradiation)...
March 16, 2017: Photomedicine and Laser Surgery
https://www.readbyqxmd.com/read/28322301/flexible-wire-shaped-strain-sensor-from-cotton-thread-for-human-health-and-motion-detection
#7
Yuan-Qing Li, Pei Huang, Wei-Bin Zhu, Shao-Yun Fu, Ning Hu, Kin Liao
In this work, a wire-shaped flexible strain sensor was fabricated by encapsulating conductive carbon thread (CT) with polydimethylsiloxane (PDMS) elastomer. The key strain sensitive material, CT, was prepared by pyrolysing cotton thread in N2 atmosphere. The CT/PDMS composite wire shows a typical piezo-resistive behavior with high strain sensitivity. The gauge factors (GF) calculated at low strain of 0-4% and high strain of 8-10% are 8.7 and 18.5, respectively, which are much higher than that of the traditional metallic strain sensor (GF around 2)...
March 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28317350/-effects-of-dentin-demineralization-and-bond-strength-properties-of-bioactive-glass-containing-resin-adhesive
#8
Wang Yu, Gong Ling, Ji Yan, Zheng Lichun, Chen Song
OBJECTIVE: This study investigated the shear bond strength and the ability of resin adhesive containing different amounts of bioactive glass (BG) to prevent dentin demineralization. METHODS: BG bonds at 30%, 40%, and 50% concentrations comprised a mixture of coupling agents modifying BG and Single Bond 2. Forty permanent premolars extracted for orthodontic treatment were randomly divided into four groups, namely, control group (BG-free), 30% BG group, 40% BG group, and 50% BG group...
August 1, 2016: Hua Xi Kou Qiang Yi Xue za Zhi, Huaxi Kouqiang Yixue Zazhi, West China Journal of Stomatology
https://www.readbyqxmd.com/read/28304128/the-thickness-of-the-adhesive-layer-increases-the-misdiagnosing-of-the-radiolucent-zones-and-restoration-replacement-indication
#9
Tatiana Tambara Fröhlich, Gabriel Ferreira Nicoloso, Tathiane Larissa Lenzi, Fabio Zovico Maxnuck Soares, Rachel De Oliveira Rocha
OBJECTIVE: To evaluate the influence of the thickness of the adhesive layer and demineralized dentin on the decision to replace composite restoration. MATERIALS AND METHODS: Eighty human third molars with occlusal preparations (Class I) were randomly assigned to eight groups (n = 10): adhesive system (Clearfil SE Bond [CSE] or Scotchbond Universal Adhesive [SBU]); the number of adhesive layers (one or two); and substrate (sound or demineralized dentin). A blinded examiner evaluated radiographs of each restored tooth...
March 17, 2017: Journal of Esthetic and Restorative Dentistry
https://www.readbyqxmd.com/read/28301024/comparison-of-cone-beam-computed-tomography-and-intraoral-radiography-in-detection-of-recurrent-caries-under-composite-restorations
#10
Shahin Kasraei, Abbas Shokri, Jalal Poorolajal, Samira Khajeh, Hamid Rahmani
Secondary caries is the most common cause of dental restoration failures. This study aimed to compare the diagnostic accuracy of conventional and digital intraoral radiography and cone beam computed tomography (CBCT) for detection of recurrent caries around composite restorations. mesio-occluso-distal (MOD) cavities were prepared using bur on 45 extracted sound human molar teeth. The teeth were divided into 3 groups. In the control group, cavities were restored with composite resin after etching and bonding (n=15)...
January 2017: Brazilian Dental Journal
https://www.readbyqxmd.com/read/28298992/effects-of-three-different-bleaching-agents-on-microhardness-and-roughness-of-composite-sample-surfaces-finished-with-different-polishing-techniques
#11
İhsan Yikilgan, Hanife Kamak, Sinem Akgul, Suat Ozcan, Oya Bala
BACKGROUND: The aim of this study was to evaluate effects of different polishing methods and whitening agents on surface hardness and roughness of nano-hybrid composite resin. MATERIAL AND METHODS: In total, one hundred twenty disc-shaped specimens were prepared to nano-hybrid composite (Charisma Diamond). 60 samples were used for microhardness measurements and the others were used for the evaluation of surface roughness. Samples were divided randomly into two subgroups (n = 30 each)...
March 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28298991/fracture-resistance-of-endodontically-treated-teeth-with-different-direct-corono-radicular-restoration-methods
#12
Horieh Moosavi, Safora Afshari, Fatemeh Manari
BACKGROUND: Endodontically treated teeth are widely considered to be more susceptible to fracture than vital teeth. Obturation procedures and post placement have been a main cause of vertical root fracture. MATERIAL AND METHODS: Forty-eight human premolars with standardized weakened roots were endodontically treated and allocated to four experimental groups (n=12). After root canal treatment, in group 1, fiber posts #1 were cemented in root canals using Estelite Core Quick, and the crowns were restored with resin composite...
March 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28298988/bond-strength-of-dental-nanocomposites-repaired-with-a-bulkfill-composite
#13
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/28298987/effect-of-different-concentrations-of-specific-inhibitor-of-matrix-metalloproteinases-on-the-shear-bond-strength-of-self-adhesive-resin-cements-to-dentin
#14
Mohammad-Esmaeel Ebrahimi-Chaharom, Mehdi Abed-Kahnamoui, Mahmoud Bahari, Hamed Hamishehkar, Mahya Gharouni
BACKGROUND: Considering the probability of chemical and enzymatic reactions between matrix metalloproteinases (MMPs) in the dentin structure and their specific inhibitors, the aim of the present study was to evaluate the effect of different concentrations of specific inhibitor of MMPs (galardin) on the shear bond strength of self-adhesive resin cements to dentin. MATERIAL AND METHODS: Forty-eight sound human premolars were mounted in self-cured acrylic resin after removal of the enamel on the buccal and lingual surfaces...
March 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28298986/flexural-strength-and-microhardness-of-anterior-composites-after-accelerated-aging
#15
Kanşad Pala, Neslihan Tekçe, Safa Tuncer, Mustafa Demirci, Fatih Öznurhan, Merve Serim
BACKGROUND: This study aimed to evaluate the flexural strength and microhardness of three different anterior composites after 10 000 thermocycles. MATERIAL AND METHODS: The mechanical properties of a nano-fill composite (Filtek Ultimate Universal Restorative (FUR) (Enamel)), a nano-hybrid composite (Clearfil Majesty ES2 (ES2) (Enamel)), and a micro-hybrid composite (G Aenial Anterior (GAA)) were investigated in this study. For the microhardness test, 8-mm diameter and 2-mm thickness composite discs were used (n = 10), and for the flexural strength test, 25x2x2 mm bar-shaped specimens were prepared (n = 13)...
March 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28298983/effect-of-thermocycling-and-varying-polymerization-techniques-on-the-restorative-interface-of-class-v-cavities-restored-with-different-composite-resin-systems
#16
Jefferson-Ricardo Pereira, Lindomar-Corrêa Júnior, Marcus-Vinicius-Reis Só, Newton-Fahl Júnior
BACKGROUND: To evaluate marginal microleakage of two composite resins - a methacrylate- and a silorane-based submitted to different polymerization techniques and thermocycling. MATERIAL AND METHODS: Ninety-six class V cavities were prepared in sound human molars and restored under different polymerization and thermocycling regimens. The adhesive systems employed were Adper Scotchbond Multipurpose and Filtek P-90 for cavities restored with Z250 and P-90. The specimens were restored with Z250 or P-90, and divided into 3 subgroups with different polymerization techniques...
March 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28292599/shaping-ability-of-reciproc-waveone-gold-and-hyflex-edm-single-file-systems-in-simulated-s-shaped-canals
#17
Taha Özyürek, Koray Yılmaz, Gülşah Uslu
INTRODUCTION: The aim of the present study was to compare the shaping ability of Reciproc (RPC; VDW, Munich, Germany), HyFlex EDM (HEDM; Coltene/Whaledent AG, Altstätten, Switzerland), and WaveOne GOLD (WOG; Dentsply Maillefer, Ballaigues, Switzerland) nickel-titanium (NiTi) files made of different NiTi alloys in S-shaped simulated canals. METHODS: Sixty S-shaped canals in resin blocks were prepared to an apical size of 0.25 mm using RPC R25, WOG Primary, and HEDM OneFile (n = 20 canal/per group) systems...
March 11, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28290660/homogeneous-liquid-phase-transfer-of-graphene-oxide-into-epoxy-resins
#18
Lyaysan Amirova, Albina Surnova, Dinar Balkaev, Delus Musin, Rustem Amirov, Ayrat M Dimiev
Quality of polymer composite materials depends on the distribution of the filler in the polymer matrix. Due to the presence of the oxygen functional groups, graphene oxide (GO) has strong affinity to epoxy resins, providing potential opportunity for the uniform distribution of GO sheets in the matrix. Another advantage of GO over its non-oxidized counterpart is its ability to exfoliate to single-atomic-layer sheets in water and in some organic solvents. However, these advantages of GO has not yet been fully realized due to the lack of the methods efficiently introducing GO into epoxy resin...
March 14, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28288297/early-rehabilitation-of-incisors-with-dentinogenesis-imperfecta-type-ii-case-report
#19
Ana Paula Ca Beltrame, Maíra Mery Rosa, Ricardo At Noschang, Izabel Cs Almeida
Dentinogenesis imperfecta is an phenotypic alteration in the formation of the organic matrix. It causes the rapid and progressive wear of tooth structure, which may compromise tooth function and aesthetics. This is a case of a 1y, 8m-old child with dentinogenesis imperfecta. All teeth presented with an opalescent appearance and grayish color hue. Compromised structural integrity was noted as excessive wear and fracturing of the enamel from the dentin layer. With low doses of midazolam (oral) and chloral hydrate (rectal) administration, in a hospital environment, sedation was used to aid full mouth rehabilitation...
2017: Journal of Clinical Pediatric Dentistry
https://www.readbyqxmd.com/read/28288289/effect-of-children-s-drinks-on-color-stability-of-different-dental-composites-an-in-vitro-study
#20
Ahmed Nour El-Din Ahmed Habib, Soad Abdelmoniem Abdelmoniem, Sara Ahmed Mahmoud
AIM: To assess the effect of four different children's drinks on color stability of resin dental composites. STUDY DESIGN: A total of one hundred and twenty specimens were prepared from Grandio SO, Filtek Z350 XT and Filtek Z250 XT (forty specimens each). Specimens were thermocycled, then each group was further subdivided into four subgroups (n=10) according to the immersion media which were chocolate milk, mango juice, orange fizzy drink, and water (control). The initial color parameters of each specimen were recorded before immersion (baseline) and color change values were recorded three and seven days after immersion in each solution using a digital spectrophotometer...
2017: Journal of Clinical Pediatric Dentistry
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