Hardness Dentistry
Mostrando 1-12 de 20 artigos, teses e dissertações.
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1. Influence of the incorporation of triclosan methacrylate on the physical properties and antibacterial activity of resin composite
Abstract The incorporation of antimicrobials in the composites as an attempt to reduce bacterial adhesion without jeopardizing mechanical properties is a challenge for Dentistry. Objective: To evaluate the bacterial adhesion and physical properties of a composite containing the methacrylate triclosan- derivative monomer (TM). Methodology: TM was synthesize
J. Appl. Oral Sci.. Publicado em: 09/09/2019
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2. Effect of vegetable oils applied over acquired enamel pellicle on initial erosion
Abstract Objective The prevalence of dental erosion has been recently increasing, requiring new preventive and therapeutic approaches. Vegetable oils have been studied in preventive dentistry because they come from a natural, edible, low-cost, and worldwide accessible source. This study aimed to evaluate the protective effect of different vegetable oils, a
J. Appl. Oral Sci.. Publicado em: 2017-08
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3. Hardness and degree of conversion of dental restorative composites based on an organic-inorganic hybrid
This paper presents a factorial design (mixture design) used to analyze the hardness and degree of monomer conversion into composites containing conventional monomers and an organic-inorganic hybrid polymer-based methacryloyloxypropyl trimethoxysilane (MEMO). For this purpose, resins (composites with SiO2) were formulated with the hybrid polymer (polycondens
Mat. Res.. Publicado em: 11/06/2013
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4. Avaliação da influência do material obturador na resistência de união de retentor intrarradicular pré-fabricado fixado com resina, em dentes fragilizados, por meio do teste de push-out e MEV / Evaluation of the influence of filling material in the bond strength of a fiber-reinforced post fixed with composite resin in weakened teeth, by push-out test and SEM
Normalmente, a restauração de dentes tratados endodonticamente e com extensa destruição corono-radicular é um desafio para o clínico. Devido à facilidade de manipulação, resinas compostas fotoativadas têm se apresentado como boa opção para o reforço intrarradicular destes dentes, antes da fixação de pinos. O objetivo desta pesquisa foi avaliar
Publicado em: 2010
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5. Efeito da irradiação do laser diodo 980 nm na microdureza da dentina radicular tratada previamente com diferentes soluções irrigantes / Effect of irradiation with diode laser (980 nm) on microhardness of root dentin previously treated with different irrigating solutions
The purpose of the present study was to evaluate, in vitro, the effect of 980 nm diode laser irradiation, in potencies of 1.5 and 3.0 W and 100 Hz frequency, on microhardness of radicular dentine in different depths. Seventy two roots of human canines were instrumented and randomly distributed into 3 groups (n=24), according to the irrigating solution used i
Publicado em: 2009
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6. Evaluation of the effect of the bleaching agent and the subsequent application of sodium fluoride on intra-coronal dentine microhardness / Avaliação do efeito do agente clareador e da subseqüente aplicação de fluoreto de sódio na microdureza da dentina intracoronária
The aim of the present study was to evaluate the microhardness of intra-coronal dentine submitted to bleaching with 38% hydrogen peroxide, photo-activated with LED-Laser and followed by the application of 2% sodium fluoride gel or 5% varnish. Crowns of 45 human maxillary canines were sectioned in the buccal-lingual direction and a sample of 25 mm of internal
Publicado em: 2009
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7. Influencia do tamanho da cavidade, tecnica de fotoativação e sistema restaurador sobre a adaptação marginal, dureza knoop e resistencia de união a dentina radicular / Influence of the cavity size, photoactivation method and restorative system on marginal adaptation, knoop hardness and bond strength to root dentin
O objetivo deste estudo foi verificar a influência do volume de compósito, técnica de fotoativação e sistema restaurador sobre a adaptação marginal, dureza Knoop e resistência de união de compósitos à dentina humana radicular. Este estudo foi dividido em 2 Capítulos. O Capítulo I verificou o efeito do volume de compósito (mantendo-se o mesmo fa
Publicado em: 2009
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8. AvaliaÃÃo in situ da influÃncia da utilizaÃÃo de diferentes sistemas adesivos no desenvolvimento da cÃrie secundÃria em esmalte / In situ evaluation of secondary caries inhibition promoted by self-etch adhesive systems containing antibacterial agents
Contemporary adhesives systems present satisfactory bonding to enamel and dentin. However, replacement of the restorations due to secondary caries formation is still a major problem and of great concern in Dentistry. Thus, this study assessed in situ the effects of adhesive systems containing or not fluoride and/or the antibacterial monomer 12-methacryloylox
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 04/08/2008
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9. Microhardness assessment of different commercial brands of resin composites with different degrees of translucence
Owing to improvements in its mechanical properties and to the availability of shade and translucence resources, resin composite has become one of the most widely used restorative materials in present day Dentistry. The aim of this study was to assess the relation between the surface hardness of seven different commercial brands of resin composites (Charisma,
Brazilian Oral Research. Publicado em: 2008-12
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10. Influência da transmitância de luz na profundidade de polimerização de compósitos fotoativáveis / Influence of light transmission on the depth of cure of composite resin
The purposes of this study was: (1) to examine the light transmittance characteristics of two light-cured resin composites, for different thickness, as a function of the wavelenght. (2) to determine the penetration depth of the light, as a function of the wavelength, and (3) to evaluate the polymerization depth of resin composites submitted to two curing sou
Publicado em: 2008
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11. Avaliação in vitro das alterações superficiais do esmalte dentário de dentes permanentes submetidos à ação de bebidas energéticas / In vitro evaluation of changes on enamel surface of permanent teeth submitted to energy drinks action
The growing consumption of soft drinks and fruit juices and its possible harmful effect on dental structures has aroused great interest in dentistry nowadays. Among the main effects often caused by the action of these carbonated drinks on dental enamel, erosions can be cited. The purpose of this study was to verify the erosive potential of energy drinks sold
Publicado em: 2008
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12. Influence of resin-composite formulation on the intra-oral degradation : in vitro study / Influencia da formulação de resinas compostas na resistencia a degradação intra-oral : estudo in vitro
Natural teeth, as well as restorations, are composed of materials that are subject to deterioration. Besides chemical, mechanical and thermo degradation, the formulation and post-cure composites network are dominant mechanism to determine the restorations longevity. The purpose of this study was to investigate the effect of materials formulation, light
Publicado em: 2008