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Analysis of depth of the microporosity in a nickel-chromium system alloy: effects of electrolytic, chemical and sandblasting etching
(Blackwell Publishing, 2003-05-01)
The present study was designed to analyse the average depth of the microporosity of a nickel-chromium (Ni-Cr) system alloy (Verabond II). The metal surface was subject to one of the following surface treatment: (i) ...
OBSERVATIONS on ETCHED ENAMEL IN NON-ERUPTED DECIDUOUS MOLARS: A SCANNING ELECTRON MICROSCOPIC STUDY
(Universidade de São Paulo (USP), 1997-07-01)
No presente trabalho, empregando a técnica de microscopia eletrônica de varredura, foram estudadas as características do esmalte da superfície vestibular de molares decíduos humanos não erupcionados, avaliando-os após ...
Effects of a non-rinse conditioner on the enamel of primary teeth
(Fundação Odontológica de Ribeirão Preto, 2003-01-01)
O objetivo deste estudo in vitro foi de avaliar ao microscópio eletrônico de varredura os aspectos morfológicos do esmalte de dentes decíduos após condicionamento com ácido fosfórico a 36% ou com um agente condicionador ...
Influence of acid-etching and ceramic primers on the repair of a glass ceramic
(2012-03-01)
The objective of this study was to evaluate the influence of different primers on the microtensile bond strength (μT BS) between a feldspathic ceramic and two composites. Forty blocks (6.0 × 6.0 × 5.0 mm 3) were prepared ...
Longitudinal bond strength evaluation using the deproteinized dentin technique
(2009-07-01)
This study evaluated bond strength to dentin as a result of storage time for conventional adhesive systems (with or without collagen) that had been deproteinized with 10% sodium hypochlorite (NaOCl). For this study, 72 ...
Accuracy of impression techniques for implants. Part 1 - Influence of transfer copings surface abrasion
(2008-12-01)
Purpose: This study evaluated the influence of surface abrasion of transfer copings to obtain a precise master cast for a partially edentulous restoration with different inclinations. Materials and Methods: Replicas (N = ...
A comparison between neutron-fluence measurements using metal-activation monitors and standard glasses calibrated via thin uranium-fission monitors and via ηq method
(2013-04-02)
The two fundamental approaches to fission-track dating involve either an explicit determination of the thermal neutron fluence (φ-method) or a calibration against age standards (ζ-method). The neutron fluence measurements ...
Effect of dentin conditioning time on nanoleakage
(Operative Dentistry Inc, 2006-07-01)
Objectives: To study the nanoleakage pattern in the dentin hybrid layer by using different dentin adhesives. The null hypotheses tested in this study were: 1) dentin conditioning time does not affect nanoleakage within the ...
Clinical evaluation of the failure rate of metallic brackets bonded with orthodontic composites
(2012-12-17)
The purpose of the present study was to evaluate in vivo the failure rate of metallic brackets bonded with two orthodontic composites. Nineteen patients with ages ranging from 10.5 to 38.7 years needing corrective orthodontic ...
Cementation of Prosthetic Restorations: From Conventional Cementation to Dental Bonding Concept
(Lippincott Williams & Wilkins, 2011-05-01)
The cementation procedure of metal-free fixed partial dentures exhibits special characteristics about the porcelains and cementation agents, which turns the correct association between these materials necessary. Our purpose ...