Results: 147

Six-month color change and water sorption of 9 new-generation flowable composites in 6 staining solutions

Braz. oral res. (Online); 30 (1), 2016
Abstract Color match and water sorption are two factors that affect restorative materials. Discoloration is essential in the lifespan of restorations. The aim of this study was to evaluate color change and water sorption of nine flowable composites at multiple time points over 6 months. 60 samples of eac...

Effect of new innovative restorative carbomised glass cement on intrapulpal temperature rise: an ex-vivo study

Braz. oral res. (Online); 30 (1), 2016
Abstract This study aimed to evaluate the temperature changes that occurred in the pulp chamber when using GCP Glass Carbomer Fill (GCP) and two different resin-modified glass-ionomer (RGI) restorative materials at different dentin thicknesses. A standardized Class I occlusal cavity with 1 mm or 2 mm den...

Four chemical methods of porcelain conditioning and their influence over bond strength and surface integrity

OBJECTIVE: To assess four different chemical surface conditioning methods for ceramic material before bracket bonding, and their impact on shear bond strength and surface integrity at debonding.METHODS: Four experimental groups (n = 13) were set up according to the ceramic conditioning method: G1 = 37% p...

Influence of polymeric matrix on the physical and chemical properties of experimental composites

Braz. oral res. (Online); 29 (1), 2015
Nowadays, the main reasons for replacement of resin-based composite restorations are fracture or problems with the integrity of their interface, such as marginal staining, microleakage, or secondary caries. The aim of the present study was to evaluate the influence of the organic matrix on polymerization...

Estudio Comparativo de la Indicación y Tasa de Sobrevida de Materiales de Restauración Utilizados en Pacientes Pediátricos de 4 a 9 Años con Alto Riesgo de Caries

La elección del material restaurador a usar, puede ser una decisión crítica, especialmente en pacientes pediátricos de alto riesgo cariogénico y corta edad, debido a que idealmente, las restauraciones debieran acompañar al diente primario a su exfoliación natural, por lo que la indicación debe es...

Evaluation of composite reinforcement on the fracture resistance of teeth with unsupported cusps

This study evaluated the fracture resistance of maxillary premolars with wide Mesial-Occlusal-Distal (MOD) cavity preparations and unsupported cusps restored by four ways, compared with intact teeth. Thirty five human teeth were divided into five groups: control (G1 - intact teeth) and four experimental ...

Shear Bond Strength of Acrylic Teeth to Heat-curing Denture Base Resin under Different Disinfectant Methods

The aim of this study was to evaluate the shear bond strength between acrylic teeth and heat-activated acrylic denture base resin using five different disinfectants solutions after simple immersion or under ultrasonic cleaner action. A total of 144 acrylic denture resin specimens were produced with both ...

Análise comparativa da microdureza superficial e profunda entre uma resina composta microhíbrida e uma resina composta de nanopartículas

Objetivo: Comparar, in vitro, a microdureza Vickers superficial e profunda entre uma resina composta microhíbrida e uma resina composta de nanopartículas.Método: Foram confeccionados 40 corpos-de-prova, distribuídos em 4 grupos (n=10/grupo) de acordo com o tipo e a superfície da resina avaliada: Z10...

Avaliaçäo da intensidade de energia luminosa e do calor produzidos por aparelhos fotopolimerizadores
Evaluation of light intensity and heat generated by photocuring units

Este trabalho avaliou, por meio de radiômetro e calorímetro, a intensidade de luz e o calor emitidos por fotopolimerizadores. Os resultados mostraram valores médios de intensidade de luz estatisticamente semelhantes para as marcas comerciais investigadas: Optilux 400©-Demetron, KL1500©-3M, Optilight...