Τίτλος:
Color stability and degree of cure of direct composite restoratives after accelerated aging
Γλώσσες Τεκμηρίου:
Αγγλικά
Περίληψη:
Purpose: This study evaluated the color changes and amount of remaining C=C bonds (%RDB) in three dental composites after hydrothermal- and photoaging. Methods and Materials: The materials tested were Estelite Σ, Filtek Supreme and Tetric Ceram. Specimens were fabricated from each material and subjected to L* a* b* colorimetry and FTIR spectroscopy before and after aging. Statistical evaluation of the ΔL,* Δa,* Δb,* ΔE and %ΔRDB data was performed by one-way ANOVA and Tukey's test. The %RDB data before and after aging were statistically analyzed using two-way ANOVA and Student-Newman-Keuls test. In all cases an α=0.05 significance level was used. Results: No statistically significant differences were found in ΔL*, Δa*, ΔE and %ΔRDB among the materials tested. Tetric Ceram demonstrated a significant difference in Δb*. All the materials showed visually perceptible (ΔE>1) but clinically acceptable values (ΔE<3.3). Within each material group, statistically significant differences in %RDB were noticed before and after aging (p<0.05). Filtek Supreme presented the lowest %RDB before aging, with Tetric Ceram presenting the lowest %RDB after aging (p<0.05). The %ΔRDB mean values were statistically significantly different among all the groups tested. No correlation was found between ΔE and %ΔRDB. © Operative Dentistry, 2007.
Συγγραφείς:
Sarafianou, A.
Iosifidou, S.
Papadopoulos, T.
Eliades, G.
Περιοδικό:
Operative Dentistry
Λέξεις-κλειδιά:
Estelite sigma; Filtek Supreme; resin; Tetric ceram; unclassified drug, analysis of variance; article; chemical structure; chemistry; color; colorimetry; comparative study; dental care; dental surgery; evaluation; hardness; infrared spectroscopy; light; materials testing; methodology; nonparametric test; phase transition; radiation exposure; time, Analysis of Variance; Color; Colorimetry; Composite Resins; Dental Restoration, Permanent; Dental Stress Analysis; Hardness; Light; Materials Testing; Molecular Structure; Phase Transition; Spectroscopy, Fourier Transform Infrared; Statistics, Nonparametric; Time Factors
