Results: 147

Color stability and surface roughness of chitosan- and nanodiamond-modified bisacrylic resin

Abstract: The aim of this study is to evaluate the effect of chitosan or nanodiamond incorporation on the color stability and surface roughness of a bisacrylic resin subjected to artificial aging. Four bisacrylic resins were evaluated, namely, control, chitosan-modified material, nanodiamond-modified mat...

Shrinkage stress and elastic modulus assessment of bulk-fill composites

J. appl. oral sci; 27 (), 2019
Abstract Bulk-fill composites were introduced in dentistry to accelerate clinical procedures while providing adequate outcomes. Concerns regarding the use of bigger composite increments rely on the polymerization shrinkage and shrinkage stress, which may generate gaps on the adhesive interface and result...

Impacto de la luz operatoria sobre las resinas compuestas: evaluación de su contracción
The impact of operative light on composite resins: evaluation of their shrinkage

El objetivo de este estudio fue analizar el comportamiento, contracción volumétrica, de diferentes resinas compuestas de fotopolimerización, expuestas a variadas condiciones de incidencia lumínica. Se tomaron volúmenes estandarizados de 7 resinas compuestas (microhíbridas y nanohíbridas y nanopart...

Effect of radiant exposure and UV accelerated aging on physico-chemical and mechanical properties of composite resins

J. appl. oral sci; 27 (), 2019
Abstract Currently, there is no consensus in terms of defining the minimum radiant exposure values necessary for achieving adequate properties of composite resin. In addition, the long-term influence that radiant exposure has on the properties of composite resins is still questionable. Objective: The obj...

Development and characterization of a novel bulk-fill elastomeric temporary restorative composite

J. appl. oral sci; 27 (), 2019
Abstract Objectives: This study investigated the physical and mechanical properties, antibacterial effect and biocompatibility of novel elastomeric temporary resin-based filling materials (TFMs) containing zinc methacrylate (ZM). Material and Methods: Experimental TFMs were prepared by mixing the zinc ...

Surface morphology and mechanical properties of conventional and self-adhesive resin cements after aqueous aging

J. appl. oral sci; 27 (), 2019
Abstract The stable long-term performance of resin cement under oral environmental conditions is a crucial factor to obtain a satisfactory success of the allceramic dental restoration. Objective: This study aimed at evaluating and comparing the surface morphology and mechanical property of conventional a...

Efeito da degradação química e mecânica em resinas compostas convencional e bulk fill

RFO UPF; 24 (3), 2019
Objetivo: o objetivo do presente estudo é avaliar a degradação da superfície por rugosidade de uma resina composta convencional e duas Bulk Fill armazenadas em bebidas ácidas, após escovação simulada. Materiais e Métodos: foram confeccionados 30 corpos de prova cilíndricos (10 mm x 1 mm) de cad...

Otimização do procedimento de colagem de braquetes ortodônticos utilizando um recipiente fotoprotetor: passo a passo

RFO UPF; 23 (3), 2018
A resina composta fotoativável é usualmente utilizada para o procedimento de colagem de braquetes ortodônticos. No entanto, seu uso requer cuidados antes da fotoativação, pois sua polimerização pode ocorrer precocemente por outras fontes de luz, que não a de um fotoativador dentário (e.g., luz a...

Survival, reasons for failure and clinical characteristics of anterior/posterior composites: 8-year findings

Braz. dent. j; 29 (6), 2018
Abstract This retrospective study aimed to compare the annual failure rate (AFR), reasons for failure and factors influencing survival of posterior and anterior composite restorations placed by undergraduate students. Composite restorations placed by undergraduate students were evaluated. The restoration...

Adhesion and Initial Colonization of Streptococcus mutans is Influenced by Time and Composition of Different Composites

ABSTRACT: The aim of this study was to evaluate the adhesion and initial colonization of S. mutans on the surface of novel composite resins during three experimental periods. Biofilms were formed on specimens of Enamel Plus HRI (Hri), FiltekTM Silorane (Si), Tetric EvoCeram® Bulk Fill (Te), KaloreTM (K)...