Surface Smoothness
Mostrando 1-12 de 19 artigos, teses e dissertações.
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1. Surface morphologic evaluation of orthodontic bonding systems under conditions of cariogenic challenge
Abstract: Orthodontic bonding systems are submitted to demineralization and remineralization dynamics that might compromise their surface smoothness, and favor biofilm aggregation and caries development. The aim of the present study was to evaluate the effects of a cariogenic challenge model (in vitro pH-cycling model) on the surface roughness and topography
Braz. oral res.. Publicado em: 25/04/2019
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2. Using Bio-Replicated Forming Technologies to Fabricate Shark-Skin Surface
ABSTRACT Shark-skin surfaces show the non-smoothness characteristics due to the presence of riblet structures. In this work, biomimetic shark-skins were prepared by means of different bio-replicated forming techniques. These techniques include the PDMS elastomeric stamping method (e.g., PES method) and the PDMS embedded-elastomeric stamping method (e.g., PEE
Braz. arch. biol. technol.. Publicado em: 14/06/2018
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3. The effect of standardised implantoplasty protocol on titanium surface roughness: an in-vitro study
Abstract: To analyse the changes of surface characteristics of machined and moderately roughened titanium disks following a standardised implantoplasty protocol. Forty titanium discs (machined: n = 20; moderately roughened: n = 20) were instrumented with one half of each disc maintained as the control (non-instrumented). The standardised implantoplasty proto
Braz. oral res.. Publicado em: 22/12/2016
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4. Extrusion-shear of AZ31 alloy billets with low temperature and high speed by using three-dimensional finite element modeling and experiments
A new kind of compound extrusion technology including direct extrusion and shears for AZ31 magnesium billets can cause plastic large deformations and high strain rates. A series of compressive tests have been done to obtain the stress-strain curves of AZ31 magnesium alloy. Three-dimensional (3D) thermo-mechanical coupled finite element modeling of forming ma
Mat. Res.. Publicado em: 28/07/2014
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5. Antimicrobial and fluoride release capacity of orthodontic bonding materials
OBJECTIVE: The aim of this study was to evaluate the antimicrobial and fluoride releasing capacity of 3 bonding materials. MATERIAL AND METHODS: Thirty nine specimens with standardized surface smoothness and dimensions were prepared. The antimicrobial capacity of the materials against S. mutans, L. casei and C. albicans was evaluated by determining the pe
J. Appl. Oral Sci.. Publicado em: 2013-07
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6. Fractal dimensional surface analysis of AISI D2 Tool steel material with nanofluids in grinding process using atomic force microscopy
The surface analysis of nanomachined AISI D2 tool steel materials is measured using atomic force microscopy. The surface roughness and fractal dimensional analysis are the important factors in nano tribology and evaluating the quality of nanomachined surface. Carbon nanotube increases the heat carrying capacity, thermal conductivity of the lubricating oil an
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2011-12
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7. Effects of different polishing techniques on the surface roughness of dental porcelains
OBJECTIVE: The purpose of this study was to evaluate the effects of different polishing techniques on the surface roughness of dental porcelains. MATERIAL AND METHODS: Fifty-five cylindirical specimens (15x2 mm) were prepared for each feldspathic (Vita VMK 95, Ceramco III) and low-fusing dental porcelain (Matchmaker). Fifty-five specimens of machinable felds
Journal of Applied Oral Science. Publicado em: 2010-02
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8. Alterações nas caracteristicas da superficie de compositos restauradores sumetidas a diferentes tecnicas de acabamento e polimento / Changes in surface characteristics of restorative composites subjected to different techniques for finishing and polishing
Several changes were made in the light-cured composites resins manufacture, especially trying to obtain better color stability, adequate wear resistance and clinically acceptable surface smoothness. About this, manufacturers have predominantly reduced the diameter of charged particles, promoting changes in its geometry and also incorporating a bigger amount
Publicado em: 2010
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9. RECONSTRUÇÃO DE GEOMETRIA A PARTIR DA CONECTIVIDADE DA MALHA E DE PONTOS DE CONTROLE / RECONSTRUTION OF GEOMETRY BASED IN CONNECTIVITY AND MESH SAMPLES
This work aims at reconstructing the geometry of a mesh from its connectivity and a small set of control points, whose geometry is known.The problem is formulated as a maximization of the surface smoothness restricting the position of the control points. With this formulation, the method reduces to solving a sparse linear system using least squares minimizat
Publicado em: 2007
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10. Tensile strenght of NiCr crowns cemented upon usinated titanium alloy abutments, LASER irradiated or not / Resistência à remoção por tração de coroas NiCr cimentadas sobre munhões usinados em liga de titânio, irradiados ou não por LASER
By means of tensile essays, NiCr total crowns were removed from usinated tronco-conical abutments composed by an Ti-6Al-4V alloy; the performance of 4 cementig agents (S. S. White zinc phoshate, Ketac Cem Easymix glass ionomer, RelayX Luting 2 composite resin and Panavia 21 TC special acrylic resin) was evaluated. Among a total of 50 abutments, 40 were used
Publicado em: 2007
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11. Estudo de retificação de vidros ópticos / A study of optical glasses grinding
The development of optical systems, the use of laser and consequently the need of refractive surface with high finish levels and precision are increasing significantly the demand for research on high precision machining. The surfaces obtained with the usual polishing process are lirnited in plane, cilindrical and spherical shape and spend a lot of time to ob
Publicado em: 2006
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12. Influência de dois sistemas adesivos e de duas técnicas de fotopolimerização na microinfiltração marginal de restaurações Classe V após preparo com alta rotação e condicionamento com laser de Er:YAG.
The purpose of this study In vitro was to evaluate the influence of two abrasive systems and two photoactivation techniques on marginal microleakage in Class V restorations prepared with high speed rotation and Er:YAG laser conditioning. Besides, this study intended to observe, through scanning electron microscopy, the interfaces resin/dentin and resin/ename
Publicado em: 2004