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KMID : 1035320190460020109
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Korean Society for Dental Materials
2019 Volume.46 No. 2 p.109 ~ p.120
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Evaluation of the color stability of light cured composite resins according to the resin matrices
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Yu Da-Hye
Jung Hyun-Jin
Choi Sung-Hyeon
Hwang In-Hyun
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Abstract
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The purpose of this study was to evaluate the color stability of light cured composite resins according to the resin matrices.
Three kinds of resin matrices such as Bis-GMA (Venus® Diamond; VD), Silorane (FiltekTM P90; P90), and Ormocer (Admira;Ad) were selected. Each of them were used to prepare 30 specimens. The initial CIE L*a*b* values were measured by meansof a Spectrophotometer (NF999, Nippon Denshoku, Japan). For accelerated aging process, the specimens were immersed ina circulating water bath with distilled water at 60℃. Spectrophotometric analyses were made after immersion of 8, 16, 24,41 days and the color difference (ΔE*) was calculated. The L* value increased compared with initial L* value. VD had thegreatest L* value change and Ad had the smallest L* value change (p<0.05). Ad had the greatest a* value change and VDhad the smallest a* value change (p<0.05). The b* value of P90 increased steadily in positive value (+)(p<0.05). ΔE* of Adhad the smallest value and that of P90 had the greatest change with time. According to this study, the value of light curedcomposite resins was increased with water sorption and color of those changed into greenish and yellowish. And accordingto the evaluation of color stability, Ad with Ormocer as resin matrices had the best color stability with time in oral environmentand P90 with Silorane as resin matrices had the lowest color stability with time. And VD had the greatest initial ΔE*.
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KEYWORD
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bis-GMA, Color stability, Light cured composite resin, Ormocer, Resin matrix, Silorane
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