Temperature changes under demineralized dentin during polymerization of three resin-based restorative materials using QTH and LED units
Restorative Dentistry & Endodontics
;
: 155-163, 2014.
Artigo
em Inglês
| WPRIM
| ID: wpr-94658
ABSTRACT
OBJECTIVES:
Light-curing of resin-based materials (RBMs) increases the pulp chamber temperature, with detrimental effects on the vital pulp. This in vitro study compared the temperature rise under demineralized human tooth dentin during light-curing and the degrees of conversion (DCs) of three different RBMs using quartz tungsten halogen (QTH) and light-emitting diode (LED) units (LCUs). MATERIALS ANDMETHODS:
Demineralized and non-demineralized dentin disks were prepared from 120 extracted human mandibular molars. The temperature rise under the dentin disks (n = 12) during the light-curing of three RBMs, i.e. an Ormocer-based composite resin (Ceram. X, Dentsply DeTrey), a low-shrinkage silorane-based composite (Filtek P90, 3M ESPE), and a giomer (Beautifil II, Shofu GmbH), was measured with a K-type thermocouple wire. The DCs of the materials were investigated using Fourier transform infrared spectroscopy.RESULTS:
The temperature rise under the demineralized dentin disks was higher than that under the non-demineralized dentin disks during the polymerization of all restorative materials (p 0.05).CONCLUSIONS:
Although there were no significant differences in the DCs, the temperature rise under demineralized dentin disks for the silorane-based composite was higher than that for dimethacrylate-based restorative materials, particularly with QTH LCU.
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Assunto principal:
Polímeros
/
Quartzo
/
Dente
/
Tungstênio
/
Espectroscopia de Infravermelho com Transformada de Fourier
/
Cavidade Pulpar
/
Dentina
/
Polimerização
/
Dente Molar
Limite:
Humanos
Idioma:
Inglês
Revista:
Restorative Dentistry & Endodontics
Ano de publicação:
2014
Tipo de documento:
Artigo
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