Correspondence to: Cláudia Helena Lovato da Silva Departamento de Materiais Dentários Faculdade de Odontologia de Ribeirão Preto, USP Av. do Café, S/N, 14040-904, Ribeirão Preto, SP, Brasil Tel: +55-16-3602-4006 Fax: +55-16-3633-0999. E-mail: [email protected] Abstract Aim: This study aim to investigate the effect of a denture cleanser on hardness, roughness and tensile bond strength of a rigid (...

It is a well-known fact that the verisimilitude of sustaining the anterior cruciate ligament (ACL) injury in a noncontact situation is greater for females than for males, dramatically (1). In sports science, many researchers have studied the mechanism and the risk factors of ACL injury, and excessive knee valgus angle (KVA) has received considerable attention as a reason of higher incidence of ...

The physics of industrial single-point force indentation hardness measurements (Vickers, Knoop, Brinell, Rockwell, Shore, Leeb, and others) is compared with the depth-sensing nano, micro, and macro instrumental hardness technique that provides several further mechanical parameters, when using the correct force/depth curves exponent 3/2 on the depth of the loading curves. Only the latter reveal ...

During the fall semester of the 2005-2006 academic year, I decided to try to produce some scale models of structural systems out of rubber. I had in mind to use these models to demonstrate structural behavior to undergraduate students, thinking that seeing models deform under load would be far more convincing than the standard line diagrams of deformed shapes that we typically use in engineerin...

in this article, hybrid organic-inorganic materials were prepared by free radical copolymerization of 2-hydroxyethyl methacrylate (hema) and 3-methacryloxy-propyltrimethoxysilane (mptms) via sol-gel process. the methoxysilane-containing copolymer precursors were synthesized at different compositions. these copolymer precursors were then hydrolyzed and condensed to produce phema-sio2 nanocomposi...

In this research, a sulfur-based polymer has been synthesized with limonene extracted from orange peels. The synthesis process carried out by dropping at 0 wt.%, 0.5 1 2 and 4 wt.% ratios into the molten sulfur. change in chemical bond structure of is determined Fourier Transform Infrared Spectrophotometer (FTIR). Moreover, density, Shore D hardness, thermal conductivity coefficient are also ch...

. The ability of Fused Deposition Modeling (FDM) 3D Printing technology to create complex objects makes this increasingly widely used. Apart from the advantages FDM technology, low dimensional accuracy and mechanical properties printed parts are one drawbacks process. In addition, developments in use elastic materials flexible products make process requires special attention. This study focused...

In this study, polyester composites reinforced with pistachio shells powder (P.) an averagediameter (150 – 200 μm) different weight ratios (0.5%, 1%, 1.5%, 2%, and 2.5%) wereprepared to the resin. The Shore D hardness, thermal conductivity (K), glass transitiontemperature (Tg) of samples were examined. results showed that hardnessincreases increase reinforcement ratio its maximum value is (87.5...