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显示 1-30 共 47 条结果 关于 "759406" 范围 论文
Geum-Jun Han et al.
The journal of adhesive dentistry, 14(5), 461-469 (2012-06-23)
To evaluate the effect of applied power on dental ceramic bonding of composite resin using nonthermal atmospheric pressure plasma (APP). A pencil-type APP torch was used to modify the surface chemical composition and hydrophilicity of dental ceramic and to improve
Rachel Parke-Houben et al.
Journal of materials science. Materials in medicine, 26(2), 107-107 (2015-02-11)
Three-dimensional scaffolds based on inverted colloidal crystals (ICCs) were fabricated from sequentially polymerized interpenetrating polymer network (IPN) hydrogels of poly(ethyleneglycol) and poly(acrylic acid). This high-strength, high-water-content IPN hydrogel may be suitable for use in an artificial cornea application. Development of
Caroline R Szczepanski et al.
Polymer, 70, 8-18 (2015-07-21)
Polymerization-induced phase separation (PIPS) was studied in ambient photopolymerizations of triethylene glycol dimethacrylate (TEGDMA) modified by poly(methyl methacrylate) (PMMA). The molecular weight of PMMA and the rate of network formation (through incident UV-irradiation) were varied to influence both the promotion
Estimation of the surface gloss of dental nano composites as a function of color measuring geometry.
Ferhan Egilmez et al.
American journal of dentistry, 25(4), 220-226 (2012-10-23)
To estimate the surface gloss of various dental nano composites by using the correlation between deltaE* specular component excluded (SCE) - specular component included (SCI) and surface roughness (Ra). Two brands of commercial and two experimental light-cured resin composites were
Fabiana Bucholdz Alves et al.
The journal of adhesive dentistry, 15(5), 439-445 (2013-03-28)
To evaluate the bonding of simplified adhesive systems to sound and caries-affected dentin of primary teeth with microtensile (µTBS) and nanoleakage (NL) tests. Occlusal cavities were prepared in 36 sound second primary molars. Half of the specimens were submitted to
M Özcan et al.
Operative dentistry, 38(1), 63-72 (2012-07-21)
Service life of discolored and abraded resin composite restorations could be prolonged by repair or relayering actions. Composite-composite adhesion can be achieved successfully using some surface conditioning methods, but the most effective adhesion protocol for relayering is not known when
I Sideridou et al.
Biomaterials, 23(8), 1819-1829 (2002-04-13)
In this work the room-temperature photopolymerization of Bis-GMA, Bis-EMA, urethane dimethacrylate (UDMA) and triethylene glycol dimethacrylate (TEGDMA) induced by camphoroquinone/N,N-dimethylaminoethyl methacrylate, as photo-initiator system, was followed by FT-IR. The results obtained were then fitted by a non-linear least square method
A Kurbad et al.
International journal of computerized dentistry, 16(1), 69-79 (2013-05-07)
A new type of material consisting of a ceramic substructure infiltrated with a composite material--referred to as a hybrid ceramic--is currently being introduced for dental CAD/CAM use. The characteristic brittleness of ceramic is thus replaced by an elasticity resembling that
Raquel Osorio et al.
Journal of endodontics, 38(9), 1227-1232 (2012-08-16)
Collagen dentin matrix may represent a suitable scaffold to be remineralized in the presence of bioactive materials. The purpose of this study was to determine if experimental resin cements containing bioactive fillers may modulate matrix metalloproteinase-mediated collagen degradation of etched
M Dewaele et al.
Journal of dental research, 91(12), 1178-1183 (2012-10-09)
Volumetric shrinkage reduction is a constant challenge in the improvement of dental resins. The inclusion of hyperbranched polymers (HBPs) with modified functionalities (hydroxyl, propionate, and methacrylate) instead of conventional dimethacrylate monomers has the potential to reduce shrinkage, but can also
Mateus Rodrigues Tonetto et al.
The journal of contemporary dental practice, 14(1), 76-79 (2013-04-13)
The behavior of polymer-matrix composite is dependent on the degree of conversion. The aim of this study was to evaluate the degree of conversion of two resin cements following storage at 37°C immediately, 24 and 48 hours, and 7 days
I V Luque-Martinez et al.
Operative dentistry, 38(1), 39-47 (2012-07-10)
To evaluate the effect of bur roughness on bond strength values and conditioner pattern of two-step self-etch adhesives applied on sclerotic dentin. The roots of 48 bovine incisors were removed and the crowns were divided into four groups: the control
Anette Kocbach Bølling et al.
Toxicology letters, 216(2-3), 130-138 (2012-11-28)
Methacrylate monomers have been identified in aqueous extracts of freshly cured dental fillings. The hypothesis tested presently was that low concentrations of triethyleneglycol dimethacrylate (TEGDMA) and 2-hydroxyethyl methacrylate (HEMA) alone or in combination interfere with the LPS-induced release of cytokines
Jingwei He et al.
Journal of biomaterials science. Polymer edition, 24(5), 565-573 (2013-04-10)
In order to endow dental resin with antibacterial activity, a series of antibacterial quaternary ammonium methacrylate monomers (QAM) with different substituted alkyl chain length (from 10 to 18) were incorporated into commonly used 2,2-bis[4-(2'-hydroxy-3'-methacryloyloxy-propoxy)-phenyl]propane (Bis-GMA)/triethyleneglycol dimethacrylate (TEGDMA) (50 wt/50 wt)
Yumiko Hosoya et al.
American journal of dentistry, 26(5), 286-290 (2014-02-01)
To evaluate the effects of a surface pre-reacted glass-ionomer (S-PRG) filled coating material to arrest artificial enamel lesions in primary teeth. Buccal and lingual enamel was demineralized in 0.1 M lactic acid buffer solution (pH 4.75) for 5 days and
N Y Cho et al.
Journal of dental research, 92(1), 76-81 (2012-10-27)
This study detected tooth-composite interfacial debonding during composite restoration by means of acoustic emission (AE) analysis and investigated the effects of composite properties and adhesives on AE characteristics. The polymerization shrinkage, peak shrinkage rate, flexural modulus, and shrinkage stress of
M D Weir et al.
Journal of dental research, 91(10), 979-984 (2012-08-31)
Secondary caries remains the main problem limiting the longevity of composite restorations. The objective of this study was to investigate the remineralization of demineralized human enamel in vitro via a nanocomposite containing nanoparticles of amorphous calcium phosphate (NACP). NACP were
Jelena Juloski et al.
American journal of dentistry, 26(5), 271-277 (2014-02-01)
To evaluate the microleakage of Class II cavities restored with experimental low-shrinking resin composites proposed for bulk filling and to measure their microtensile bond strength (microTBS) to dentin and compare to those of previously marketed low-shrinkage composites. Class II cavities
Caroline R Szczepanski et al.
European polymer journal, 67, 314-325 (2015-05-09)
This work presents an approach to extend the period for phase separation, independent of temperature, in ambient phase-separating photopolymerizations based on the copolymerization of structurally similar mono- and di-vinyl monomers. Copolymer resins composed of triethylene glycol dimethacrylate (TEGDMA) and ethylene
Eliseu Aldrighi Munchow et al.
The journal of contemporary dental practice, 13(3), 299-304 (2012-08-25)
The purpose of this study was to investigate the influence of the surface roughness on the surface microhardness of experimental composites with varying filler concentration. Experimental resin composites were formulated by mixing Bis-GMA and TEGDMA in a 50/50% weight ratio
Ven-Shing Wang et al.
Journal of chromatography. B, Analytical technologies in the biomedical and life sciences, 903, 88-94 (2012-07-27)
A direct immersion solid phase microextraction (DI-SPME) method was developed for the analysis of dentin monomers in saliva. Dentine monomers, such as triethylene glycol dimethacrylate (TEGDMA), urethane dimethacrylate (UDMA) and 2,2-bis-[4-(2-hydroxy-3-methacryloyloxypropoxy) phenyl]-propane (Bis-GMA), have a high molecular weight and a
Sheila P Passos et al.
Compendium of continuing education in dentistry (Jamesburg, N.J. : 1995), 34(1), 62-63 (2013-04-05)
This study aimed to evaluate and compare the mechanical properties of five commercial core materials using fracture toughness (FT), Knoop hardness number (KHN), diametral tensile strength (DTS), and dynamic elastic moduli (DEM). Composite material specimens were produced (Rock Core, CosmeCore
M D'Amario et al.
Operative dentistry, 38(1), 33-38 (2012-07-10)
The aim of this study was to assess the flexural strengths of three resin composites prepared at room temperature or cured after 20 or 40 cycles of preheating to a temperature of 45°C. Three resin composites were evaluated: Enamel Plus
Emel Karaman et al.
The journal of adhesive dentistry, 14(5), 485-492 (2012-06-23)
To evaluate the 24-month clinical performance of cervical restorations using a nanohybrid and a flowable resin composite with a one-step self-etching adhesive. Twenty-one patients with at least one pair of non-carious cervical lesions participated in this study. A total of
Céline M Desmet et al.
PloS one, 10(6), e0131913-e0131913 (2015-07-01)
In the aftermath of a major radiological accident, the medical management of overexposed individuals will rely on the determination of the dose of ionizing radiations absorbed by the victims. Because people in the general population do not possess conventional dosimeters
Ha-Jeong Kwon et al.
Dental materials journal, 34(3), 327-335 (2015-04-24)
The aim of this study was to analyze the unreacted monomers of four commonly used composite resins, which were released after curing with different polymerization conditions. Four composite resins, consisting of two hybrid types and two flowable types from two
The effects of environment and cyclic fatigue on the mechanical properties of an indirect composite.
Ryan K Hurley et al.
Journal of dentistry, 40(10), 787-792 (2012-06-23)
The purpose of this study was to examine the flexure strength (σ) and fracture toughness (K(IC)) of three indirect dental composites (dentin, body, and incisal) with respect to loading (static and cyclic), testing environments (air and water) and ageing (0
Xiaofei Yun et al.
The journal of adhesive dentistry, 15(3), 251-258 (2013-03-28)
To evaluate the effect of artificial aging on the bond durability of fissure sealants in vitro. Twenty bovine incisors received 4 different sealant treatments and were divided into four groups: 1. Ultraseal XT plus (UX); 2. Enamel Loc (EL); 3.
Farid S El-Askary et al.
American journal of dentistry, 25(2), 97-102 (2012-07-12)
To investigate the influence of shade and light-curing distance on the degree of conversion (DC) and flexural strength (FS) of a dual-cure core build-up resin composite. 135 specimens were prepared and divided into three main groups according to the shade
Liang Chen et al.
Biomedical materials (Bristol, England), 7(4), 045014-045014 (2012-06-13)
The purpose of this research was to investigate the influence of the glyoxylic acid (GA) modification of hydroxyapatite (HAP) nanofibers on their dispersion in bisphenol A glycidyl methacrylate (BisGMA)/triethylene glycol dimethacrylate (TEGDMA) dental composites and also to investigate the mechanical
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