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KMID : 0362720060440040256
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Journal of the Korean Dental Association
2006 Volume.44 No. 4 p.256 ~ p.264
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Kim Sun
Cha Hyun-Suk
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Abstract
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The purpose of this study was to investigate the color stability of flowable composite resins after immersion in a Coffee Mix and green tea solution with or without surface glazing resin.
Three flowable composite resins(Filtek Flow, Aeliteflo and DenFill Flow)and one universal hybrid composite resins(Z-100) were used for the specimens in this study. Eighty specimens(12mm×2mm) were fabricated from each composites resin and were divided into two groups(mechanical polishing only; Unglazing group, and chemical polishing with surface glazing resin; Glazing group). Each group of specimens were immersed in a Coffee Mix solution and a green tea solution during 185 hours(about 8 days).
The color changes(ΔE*) of all specimens before and after staining were measured by Spectrophotometer(Minolta 3500d, Japan) and statistically analyzed.
The results were as follows:
1. All of the specimen groups showed perceivable and significant color change(ΔE*). Flowable resin groups showed different color changes according to the polishing methods, and discoloring solution. Among unglazing groups, DenFill Flow in a green tea solution showed the least color change(1.26±0.75) and Filtek Flow in a Coffee Mix solution showed the greatest color change(9.04±3.13). Hybrid resin Z-100 by unglazing in green tea solution showed the least color change(2.29±0.40) and showed the greatest color change (9.10±1.13) in coffee mix solution by glazing (P< .001).
2. There was a significant greater color change in glazing groups than unglazing groups(P< .001).
3. There was a significant color change difference by discoloring solution : Coffee Mix solution showed more color change than green tea solution(P< .001).
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KEYWORD
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Flowable composite resin, Spectrophotometer, Surface glazing resin
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