Knoop Hardness
Mostrando 1-12 de 127 artigos, teses e dissertações.
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1. Effect of Protein-Based Treatment on Chemical Composition, Hardness and Bond Strength of Remineralized Enamel
Resumo Este estudo avaliou a composição química e microdureza do esmalte humano tratado com solução de Derivados da Matriz do Esmalte (EMD) e a resistência de união entre compósito e este esmalte. Trinta amostras de esmalte humano foram aleatoriamente divididas em três grupos: Esmalte Intocado (UE), Esmalte Desmineralizado (DE) e Esmalte Desminerali
Braz. Dent. J.. Publicado em: 2021-02
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2. Efeito de diferentes soluções irrigadoras na microdureza superficial Knoop de dentes artificiais
Resumo Introdução Dentes artificiais têm sido empregados para a prática de ensino pré-clínico. Porém, não se sabe o comportamento dos mesmos frente aos diferentes procedimentos realizados durante um tratamento endodôntico simulado. Objetivo Avaliar a microdureza de réplicas de dentes humanos, frente a diferentes soluções irrigadoras. Material
Rev. odontol. UNESP. Publicado em: 24/10/2019
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3. Solvent Degradation and Polymerization Shrinkage Reduction of Resin Composites Using Isobornyl Methacrylate
Resumo O objetivo nesse estudo foi utilizar o isobornil metacrilato (IBOMA) como monômero combinante ou substituinte na matriz resinosa de resinas compostas odontológicas. Para tanto, a matriz resinosa foi formulada com 60 % em peso de BisGMA e 40 % em peso de monômero diluente. O TEGDMA foi utilizado como único monômero diluente para o grupo controle c
Braz. Dent. J.. Publicado em: 03/06/2019
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4. Antibacterial, chemical and physical properties of sealants with polyhexamethylene guanidine hydrochloride
Abstract The aim of this study was to evaluate the influence of polyhexamethylene guanidine hydrochloride (PHMGH) in the physico-chemical properties and antibacterial activity of an experimental resin sealant. An experimental resin sealant was formulated with 60 wt.% of bisphenol A glycol dimethacrylate and 40 wt.% of triethylene glycol dimethacrylate with a
Braz. oral res.. Publicado em: 18/03/2019
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5. Surface morphology and mechanical properties of conventional and self-adhesive resin cements after aqueous aging
Abstract The stable long-term performance of resin cement under oral environmental conditions is a crucial factor to obtain a satisfactory success of the allceramic dental restoration. Objective: This study aimed at evaluating and comparing the surface morphology and mechanical property of conventional and self-adhesive resin cement after aqueous aging. Mate
J. Appl. Oral Sci.. Publicado em: 08/11/2018
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6. Effect of disinfection techniques on physical-mechanical properties of a microwave-activated acrylic resin
Abstract The effects of disinfection by microwave irradiation and immersion in peracetic acid on the physical-mechanical properties of a microwave-activated acrylic resin were evaluated. Specimens of acrylic resin were divided into a control group (specimens not disinfected) and 2 test groups subjected to one disinfection method: microwave irradiation at 85
Polímeros. Publicado em: 06/07/2018
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7. Effect of Ceramic Interposition and Post-activation Times on Knoop Hardness of Different Shades of Resin Cement
Resumo O objetivo deste estudo foi avaliar a dureza Knoop de diferentes cores de um cimento resinoso fotoativado diretamente ou através da interposição de um disco de cerâmica, medindo 15 min ou 24 h após exposição à luz, em diferentes profundidades. Amostras do cimento resinoso (Variolink Veneer) em sete cores foram fabricados num molde de elastôme
Braz. Dent. J.. Publicado em: 2018-02
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8. Influence of addition of [2-(methacryloyloxy)ethyl]trimethylammonium chloride to an experimental adhesive
Abstract The aim of this study was to develop an experimental adhesive with addition of [2-(methacryloyloxy)ethyl]trimethylammonium chloride (METAC) and to evaluate its mechanical and biological properties and its in vitro antibacterial activity. An experimental adhesive resin was formulated with Bis-GMA, TEGDMA, and HEMA. The antibacterial monomer was added
Braz. oral res.. Publicado em: 04/05/2017
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9. Evaluation of phenyl-propanedione on yellowing and chemical-mechanical properties of experimental dental resin-based materials
ABSTRACT Objective To evaluate the influence of phenyl-propanedione on yellowing and chemical-mechanical properties of experimental resin-based materials photoactivated using different light curing units (LCUs). Material and Methods Experimental resin-based materials with the same organic matrix (60:40 wt% BisGMA:TEGDMA) were mechanically blended using a
J. Appl. Oral Sci.. Publicado em: 2016-12
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10. Effect of Polymerization Cycles on Gloss, Roughness, Hardness and Impact Strength of Acrylic Resins
Resumo O propósito neste estudo foi avaliar os ciclos de polimerização convencional e por fervura sobre o brilho, rugosidade, dureza e resistência ao impacto de resinas acrílicas. Amostras foram confeccionadas para cada resina Clássico ou QC-20 (n=20) em moldes de gesso obtidos de matrizes metálicas retangulares incluídas em muflas metálicas. A prop
Braz. Dent. J.. Publicado em: 2016-04
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11. In vitro re-hardening of artificial enamel caries lesions using enamel matrix proteins or self-assembling peptides
ABSTRACT Objectives To assess the re-hardening potential of enamel matrix derivatives (EMD) and self-assembling peptides in vitro, hypothesizing that these materials may increase the mineralization of artificial carious lesions and improve hardness profiles. Material and Methods Forty-eight enamel samples were prepared from extracted bovine lower central
J. Appl. Oral Sci.. Publicado em: 2016-02
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12. Bioactivity, physical and chemical properties of MTA mixed with propylene glycol
AbstractObjective To investigate the physical (setting time, hardness, flowability, microstructure) and chemical (pH change, calcium release, crystallinity) properties and the biological outcomes (cell survival and differentiation) of mineral trioxide aggregate (MTA) mixed using different proportions of propylene glycol (PG) and water.Material and Methods Wh
J. Appl. Oral Sci.. Publicado em: 2015-08