Study and optimization of photocuring processes of composite resins to dental jobs. / Estudo e otimização da fotocura de resinas compostas de emprego odontológico

AUTOR(ES)
DATA DE PUBLICAÇÃO

2010

RESUMO

The aim of this study was to investigate the optimization of photo-cure of dental composite resin by combined curing methods. The curing was performed associating ultrasound and LED and LED with pre-heating composite resin. The irradiation performed was centered at 470 nm with power density of 600 mW/cm2 for the ultrasound and pre-heating association. The application of mechanical waves (ultrasound) was performed using 30 kHz (continuous mode) and 1 MHz (continuous and pulsed), and pre-heating with temperatures of 37oC, 50oC and 60oC. The influence on polymerization shrinkage was also evaluated through the variation of speckle contrast. The composite resin used was FiltekTM Z250 (3M ESPE) shade A2. Vickers microhardness and degree of conversion for the application of ultrasound in conjunction with LED were investigated. For the pre-heating composite resin and LED photo-activation, the Vickers microhardness, degree of conversion, fluorescence, color stability, shrinkage and marginal adaptation were performed. The results showed to be promising for the optimization of photo-cure of dental resins.

ASSUNTO(S)

fotoativação polimerização compósito dental photo-activation pré-aquecimento dental composite. polymerization ultrasound ultrassom pre-heating

ACESSO AO ARTIGO

Documentos Relacionados