Degree of conversion of two dual-cured resin cements light-irradiated through zirconia ceramic disks
The Journal of Advanced Prosthodontics
;
: 464-470, 2013.
Article
Dans Anglais
| WPRIM
| ID: wpr-227897
ABSTRACT
PURPOSE:
The aim of this Fourier transform infrared (FTIR) spectroscopic study was to measure the degree of conversion (DC) of dual-cured resin cements light-irradiated through zirconia ceramic disks with different thicknesses using various light-curing methods. MATERIALS ANDMETHODS:
Zirconia ceramic disks (KT12) with three different thicknesses (1.0, 2.0, and 4.0 mm) were prepared. The light transmittance of the disks was measured using ultraviolet visible near-infrared spectroscopy. Four different light-curing protocols were used by combining two curing light modes (Elipar TriLight (standard mode) and bluephase G2 (high power mode)) with light-exposure times of 40 and 120 seconds. The DCs of the two dual-cured resin cements (Duo-Link and Panavia F2.0) light-irradiated through the disks was analyzed at three time intervals (3, 7, and 10 minutes) by FTIR spectroscopy. The data was analyzed using repeated measures ANOVA (alpha=.05).Two-way ANOVA and Tukey post hoc test were used to analyze the 10 minute DC results.RESULTS:
The 1.0 mm thick disk exhibited low light transmittance (<25%), and the transmittance decreased considerably with increasing disk thickness. All groups exhibited significantly higher 10 minute DC values than the 3 or 7 minute values (P<.05), but some exceptions were observed in Duo-Link. Two-way ANOVA revealed that the influence of the zirconia disk thickness on the 10 minute DC was dependent on the light-curing methods (P<.001). This finding was still valid even at 4.0 mm thickness, where substantial light attenuation took place.CONCLUSION:
The curing of the dual-cured resin cements was affected significantly by the light-curing technique, even though the additional chemical polymerization mechanism worked effectively.
Texte intégral:
Disponible
Indice:
WPRIM (Pacifique occidental)
Sujet Principal:
Polymères
/
Analyse spectrale
/
Zirconium
/
Céramiques
/
Spectroscopie infrarouge à transformée de Fourier
/
Céments résine
/
Spectroscopie proche infrarouge
/
Polymérisation
/
Analyse de Fourier
/
Méthodes
langue:
Anglais
Texte intégral:
The Journal of Advanced Prosthodontics
Année:
2013
Type:
Article
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