Buscar
Mostrando ítems 1-10 de 20376
Evaluation of the thermoplasticity of different gutta-percha cones and Resilon®
(2007-04-01)
The goal of this study was to evaluate the thermoplasticity of conventional and thermoplastic gutta-percha and Resilon®, a polyester polymer-based material. Specimens with standardised dimensions were made from the following ...
Design studies of the magnetic properties of structural materials affecting the magnetic field of high-homogeneity superconducting magnets
(2001-12-01)
Austenitic stainless steel presents phase changes caused by heat treatment and welding processes. Because it represents a problem in the design of high-homogeneity magnets, we have been studying the magnetic properties of ...
Effect of disinfectant agents on dimensional stability of elastomeric impression materials.
(1999-05-01)
STATEMENT OF PROBLEM: Difficulties in sterilizing impressions by traditional methods have led to chemical disinfection as an alternative, and some studies have shown that disinfectants may adversely affect impressions. ...
The changes on microstructure and electrical properties of Bi:2223/Ag composite as a function of the granulation and the content of the added silver powder
(Trans Tech Publications Ltd, 2005-12-01)
The Bi-Sr-Ca-Cu-O system has been one of the most studied superconducting ceramic materials for industry applications. The most of the studies with this aim are on silver/ceramic composites, due to the benefits and great ...
Sealing ability of retrograde obturation materials containing calcium hydroxide or MTA
(2011-12-01)
Newly available materials for retrograde obturation should have their sealing properties evaluated. The goal of this study was to evaluate the sealing ability of Endo CPM sealer, an MTA-based endodontic cement. Single-rooted ...
The effect of endodontic materials on the optical density of dyes used in marginal leakage studies
(2008-01-01)
The aim of this study was to determine the effect of the exposure of different endodontic materials to different dye solutions by evaluating the optical density of the dye solutions. Seventy-five plastic tubes were filled ...
Mechanical and Metallographic Effects of Laser Hardening of Two AHSS Steels
(Amer Soc Testing Materials, 2016-01-01)
The search for suitable materials for the transport industry, to meet more stringent regulations related to crashworthiness, emissions, and fuel economy led to the development of advanced high-strength steels (AHSS). Thermal ...
Effect of restorative material on mechanical response of provisional endocrowns: A 3D—FEA study
(2021-01-01)
The goal of this study was to evaluate the stress distribution in an endocrown restoration according to different provisional restorative materials. An endodontically treated maxillary molar model was selected for conducting ...
Effect of weathering and thickness on roughness of acrylic resin and ocular button
(2010-06-01)
Purpose: The aim of this study was to evaluate the roughness of colorless ocular button and four brands of colorless acrylic resins designed to fabricate ocular prosthesis as a function of weathering (1008 h) and different ...
Post-selection and return of foraged material by Acromyrmex subterraneus brunneus (Hymenoptera: Formicidae)
(2003-05-19)
Two colonies of Acromyrmex subterraneus brunneus Forel (Hymenoptera: Formicidae) were studied regarding their behavior during cultivation of the fungus garden to determine a) the existence of post-selection of foraged ...