Cohesive Interface
Mostrando 1-12 de 30 artigos, teses e dissertações.
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1. How to improve root canal filling in teeth subjected to radiation therapy for cancer
Abstract The aim of this study was to evaluate the influence of radiation therapy on root canal sealer push-out bond strength (BS) to dentin and the sealer/dentin interface after different final irrigation solutions (NaOCl, EDTA, and chitosan). Sixty-four maxillary canines were distributed into two groups (n=30): non-irradiated and irradiated with 60 Gy. Can
Braz. oral res.. Publicado em: 29/11/2018
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2. Chlorhexidine and proanthocyanidin enhance the long-term bond strength of resin-based endodontic sealer
Abstract The aim of this study was to evaluate the effects of proanthocyanidin (PA) and chlorhexidine (CHX) on the bond strength (BS), failure pattern, and resin-dentin interface morphology of the endodontic sealers EndoREZ and AH Plus after 24 h and 6 months of water storage. A total of 120 prepared bovine roots were divided into six groups: AH Plus, CHX+AH
Braz. oral res.. Publicado em: 24/05/2018
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3. Continuous Modeling Technique of Fiber Pullout from a Cement Matrix with Different Interface Mechanical Properties Using Finite Element Program
Abstract Fiber-matrix interface performance has a great influence on the mechanical properties of fiber reinforced composite. This influence is mainly presented during fiber pullout from the matrix. As fiber pullout process consists of fiber debonding stage and pullout stage which involve complex contact problem, numerical modeling is a best way to investiga
Lat. Am. j. solids struct.. Publicado em: 2016-10
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4. Root filling bond strength using reciprocating file-matched single-cones with different sealers
Abstract The aim of the present study was to evaluate the bond strength (BS) of root canal fillings to root dentin using the reciprocating file-matched single-cone or lateral compaction techniques with resin-based and calcium-silicate-based sealers. Maxillary canine roots were prepared and filled using one of the following approaches: Reciproc R40 file and R
Braz. oral res.. Publicado em: 20/05/2016
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5. Finite element analysis for mechanical characterization of 4D inplane carbon/carbon composite with imperfect microstructure
Finite element mesh of multi-directional 4D carbon/carbon (C/C) composite was reconstructed from 2D images obtained by X-ray tomography. Thus, imperfections in the composite such as voids, misalignment and cross-section distortion of the fibre bundles were directly incorporated in the finite element mesh. 2D images of the composite were also used for the cha
Lat. Am. j. solids struct.. Publicado em: 2014-03
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6. Push-out bond strength and SEM evaluation of a new bonding approach into the root canal
OBJECTIVE: This study evaluated the performance of different adhesive systems in fiber post placement aiming to clarify the influence of different hydrophobic experimental blend adhesives, and of one commercially available adhesive on the frictional retention during a luting procedure. MATERIAL AND METHODS: One luting agent (70 Wt% BisGMA, 28.5% TEGDMA; 1.5%
J. Appl. Oral Sci.. Publicado em: 2012-12
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7. Numerical simulations of crack propagation tests in adhesive bonded joints
Mainly due to their low weight, low cost and ease of assembly, the adhesive bonds have emerged as a promising technology. However, the lack of adequate tools of design and control remain an obstacle to the use of the adhesives. In this work a cohesive interface model formulated within the framework of damage mechanics is applied for the simulation of decohes
Lat. Am. j. solids struct.. Publicado em: 2012-06
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8. Influência da ciclagem térmica e mecânica em água na resistência ao cisalhamento da união infraestrutura/porcelana de cobertura de diferentes sistemas totalmente cerâmicos / Shear bond strength of all-ceramics core/veneer interface and its susceptibility to thermal and mechanical cycling
The objective of this study was to evaluate the influence of thermal and mechanical cycling on the shear bond strength of different all-ceramic cores and veneering porcelain interfaces. It was also to characterize chemically the interfaces by energy dispersive spectroscopy (EDS). The allceramic systems tested were lithium dissilicate (DL), zirconia veneered
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/05/2011
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9. Effects of silica coating and silane surface conditioning on the bond strength of rebonded metal and ceramic brackets
OBJECTIVE: The aim of this study was to evaluate the effects of tribochemical silica coating and silane surface conditioning on the bond strength of rebonded metal and ceramic brackets. MATERIAL AND METHODS: Twenty debonded metal and 20 debonded ceramic brackets were randomly assigned to receive one of the following surface treatments (n=10 for each group):
Journal of Applied Oral Science. Publicado em: 2011-06
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10. PARALLEL TOPOLOGICAL SUPPORT FOR FINITE ELEMENT MESHES IN DYNAMIC FRACTURE AND FRAGMENTATION ANALYSES / SUPORTE TOPOLÓGICO EM PARALELO PARA MALHAS DE ELEMENTOS FINITOS EM ANÁLISES DINÂMICAS DE FRATURA E FRAGMENTAÇÃO
Fracture propagation and fragmentation phenomena in solids can be described by Cohesive Zone Models and simulated with the Finite Element Method. Among the computational approaches of recent interest for fracture representation in finite element meshes are those based on cohesive elements. In those approaches, fracture behavior is represented by cohesive ele
Publicado em: 2011
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11. Fratura na interface de bimateriais : soluções analíticas e numéricas / Bi-material interface fracture: analytical and numerical solutions
Neste trabalho, é estudada a fratura na interface de materiais dissimilares empregando duas metodologias distintas: a Mecânica da Fratura Linear Elástica (MFLE) e os métodos coesivos. O uso da MFLE aplicada a trincas situadas na interface de materiais dissimilares apresenta algumas dificuldades bem conhecidas que podem inviabilizar seu uso, como a presen
Publicado em: 2011
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12. Influência da pressão da água intersticial na resistência ao arrancamento de geogrelha em solo coesivo / Influence of pore water pressure in pullout resistance of geogrid in cohesive soil
O bom desempenho de uma estrutura de solo reforçado depende fundamentalmente da interação entre o solo de aterro e o elemento de reforço. A utilização de solos coesivos pode causar efeitos negativos à estabilidade da estrutura. Um elevado percentual de partículas finas na composição do solo pode favorecer ao desenvolvimento de pressões da água in
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 08/12/2010