Two-year color changes of light-cured composites: Influence of different light-curing units
Yükleniyor...
Dosyalar
Tarih
2005
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
OPERATIVE DENTISTRY INC
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
This study determined color changes in a composite cured with various types of curing units after two years. A hybrid (Clearfil AP-X) composite was cured with a conventional halogen, a high intensity halogen, a plasma arc and a light emitting diode unit. The specimens were stored in light-proof boxes after the curing procedure to avoid further exposure to light and stored in 37 degrees C in 100% humidity. Colorimetric values of the specimens immediately after curing and after two years were measured using a colorimeter. The CIE 1976 L*a*b color system was used to determine color differences. Differences from baseline were calculated as Delta E*(ab). Data were analyzed with two-way analysis of variance (p < 0.05). The Delta E-ab* values varied significantly, depending on the curing unit used. The specimens cured with a plasma arc curing unit induced significantly higher color changes than any other specimen and the color differences were also visually appreciable by the non-skilled operator (AE*(ab) > 2.5). The specimens cured with a high intensity halogen curing unit produced the lowest color change; however, there were no statistically significant differences among the color changes of specimens cured with conventional halogen, high intensity halogen and the light emitting diode unit, and the color changes were not clinically relevant (Delta E*(ab)< 2.5). The results of this study suggest that composite materials undergo measurable changes due to curing unit exposure. The specimens cured with a plasma arc light showed the highest color changes as compared to specimens cured with other curing units.
Açıklama
Anahtar Kelimeler
Kaynak
OPERATIVE DENTISTRY
WoS Q Değeri
Q2
Scopus Q Değeri
Q1
Cilt
30
Sayı
5
