Introduction: finishing and polishing of composite resins (CR) can directly interfere with the roughness of these materials, being related to bacterial plaque adhesion, staining, gloss and smoothness. Objective: to compare the surface roughness of two CR, a micro-hybrid (Filtek Z250) and a nanoparticulate (Filtek Z350) after finishing and polishing. Methods: using a metal matrix, fifteen disks of each CR were m...
Introduction: The use of different polyphenols in the increase of the mechanical properties of dentin collagen has been widely used, thus, tannic acid being a polyphenol with very pronounced biological proprieties. Objective: to evaluate the biomodifying potential of tannic acid (AT) in different concentrations in dentin collagen. Methods: the factors under investigation were modulus of elasticity, measured by ...
O contato prévio com determinado assunto antes de uma aula pode ser, muitas vezes, bastante proveitoso na aprendizagem do aluno, uma vez que tal medida proporciona certa familiaridade com o conteúdo previamente lecionado. Uma das formas de incentivar tal abordagem prévia por parte do aluno, é por meio da aplicação de teste de conhecimentos antes da aula, para que os alunos possam, assim, demonstrar como compree...
Resumo: O projeto desenvolvido tem como objetivo encontrar quais os motivos que causaram a desistência ou o abandono dos alunos do curso de odontologia nos últimos oito semestres, (2012.2/2016.1). Para a realização do projeto, foram selecionados um total de 120 alunos que se encaixavam no perfil de desistência ou trancamento da matrícula, desses, um total de 60 alunos foram entrevistados. O contato com os aluno...
Objective: This study aimed to evaluate the effectiveness of different mechanical methods for the removal of demineralized dentin. Methods: Healthy human third molars were prepared in such a way that the flat occlusal surfaces of the dentin were exposed and longitudinally sectioned in a vestibular-lingual direction. One section of each tooth was submitted to the pH-cycling model, while the other section was kep...
Non-carious cervical lesions are usually associated with dentin hypersensitivity. The use of oxalic acid in restorations of these lesions could be beneficial in relieving pain. Aims: To evaluate the use of oxalic acid in restorations of non-carious cervical lesions. Settings and Design: A randomized clinical trial. Subjects and Methods: One operator placed 90 restorations in 20 volunteers of both sexes, with at...
The aim of this study was to evaluate the influence of ceramic surface treatments and silane drying temperature on the microtensile bond strength (μTBS) of a resin composite to a lithium disilicate ceramic. Twenty blocks (7x7x5 mm) of lithium disilicate-based hotpressed ceramic were fabricated and randomly divided into 4 groups: G1: acid etching with 9.5% hydrofluoric acid for 20 s and drying silane with room-t...
Objetivo: O objetivo do presente estudo foi avaliar a dureza de uma resina composta nanoparticulada com diferentes protocolos de fotoativação. Material e Método: Foram confeccionados 10 espécimes (5 mm de diâmetro x 2 mm de espessura) através da inserção de um único incremento do material em uma matriz metálica bipartida com um orifício central. A resina foi fotoativada com uma unidade de luz halógena utilizand...