INTRODUCTION The aim of this study was to evaluate the effect of mechanical and manual mixing as well as the effect of ultrasonic agitation during placement on the flexural strength and porosity of mineral trioxide aggregate (MTA). METHODS White ProRoot MTA and white MTA Angelus were used. One gram of each powder was mixed with a 0.34-g aliquot of distilled water. Specimens were mixed either ...

Correspondence to: Lincoln I. Nojima Universidade do Brasil UFRJ Faculdade de Odontologia Programa de Pós-graduação em Odontologia Av. Professor Rodolpho Paulo Rocco, 325 Ilha do Fundão Rio de Janeiro RJ Brasil CEP: 21941-617 Phone: 2590-2727 / Fax: 21-2590-9771 E-mail: [email protected] Abstract Aim: To assess the flexural strength of orthodontic acrylic resins from two different manufacturer...

AIM Silver colloidal nanoparticles have been incorporated into acrylic resins to induce antimicrobial properties. However, as additives, they can influence the mechanical properties of the final product. Mechanical properties are also dependent on different curing cycles. The aim of this study was to evaluate flexural strength of a denture base resin incorporated with different concentrations o...

An isopach map made from seismic reflection and refraction data in the Bay of Bengal shows two prominent N-S trending features in the basement topography. One is the northernmost portion of the Ninetyeast Ridge which is totally buried by sediments north of 10øN. The other buried ridge trends roughly N-S for 1400 km at 85øE to the latitude of Sri Lanka and then curves toward the west. It has bas...

Lightweight and efficient structures have the aim to enhance the efficiency of the components in various industries. Toward this end, composites are one of the most widely used materials because of durability, high strength and modulus, and low weight. One type of the advanced composites is grid-stiffened composite (GSC) structures, which have been extensively considered in aerospace, automotiv...

in the present study, the effect of various weight fractions of graphene nanoplatelet (gpl) on flexural fatigue behavior of epoxy polymer has been investigated at room temperature and generally the temperature was monitored on the surface of specimen during each test. the flexural stiffness of grapheme nano-platelet/epoxy nanocomposites at 0.1, 0.25 and 0.5 wt. % as a main effective parameter o...

objective(s): the aim of this study was to synthesis new dental nanocomposites reinforced with fabricated glass nanoparticles and compare two methods for fabrication and investigate the effect of this filler on mechanical properties. materials and methods: the glass nanoparticles were produced by wet milling process. the particle size and shape was achieved using psa and sem. glass nanoparticle...

Drug-related eruptions that appear only on intertriginous or flexural folds and in gluteal areas have recently been termed symmetrical drug-related intertriginous and flexural exanthema (SDRIFE). We report a case of a 56-year-old woman with acute erythematous rash in the intertriginous areas after treatment with the L-valine ester of acyclovir, valacyclovir. Oral-challenge tests resulted in ery...

excellent mechanical properties of carbon nanotubes (cnts) make them outstanding candidate reinforcements to enhance mechanical properties of conventional composites. the glass/polyester composites are widely used in many industries and applications. improving the mechanical properties of such composites with addition of cnts can increase their applications. in this research, multi-walled carbo...