Temperature changes under demineralized dentin during polymerization of three resin-based restorative materials using QTH and LED units
Restorative Dentistry & Endodontics
;
: 155-163, 2014.
Article
in English
| 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.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Polymers
/
Quartz
/
Tooth
/
Tungsten
/
Spectroscopy, Fourier Transform Infrared
/
Dental Pulp Cavity
/
Dentin
/
Polymerization
/
Molar
Limits:
Humans
Language:
English
Journal:
Restorative Dentistry & Endodontics
Year:
2014
Type:
Article
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