Effect of immersion into solutions at various pH on the color stability of composite resins with different shades
Moon Ji-Deok, 선은미, 손성애, 정경화, 권용훈, 박정길,
소속 상세정보
( Moon Ji-Deok ) - Pusan National University School of Dentistry Department of Conservative Dentistry
선은미 ( Seon Eun-Mi ) - Pusan National University School of Dentistry Department of Conservative Dentistry
손성애 ( Son Sung-Ae ) - Pusan National University School of Dentistry Department of Conservative Dentistry
정경화 ( Jung Kyoung-Hwa ) - Pusan National University School of Dentistry Department of Conservative Dentistry
권용훈 ( Kwon Yong-Hoon ) - Pusan National University School of Dentistry Department of Dental Materials
박정길 ( Park Jeong-Kil ) - Pusan National University School of Dentistry Department of Conservative Dentistry
KMID : 1034420150400040270
Abstract
Objectives: This study examined the color changes of a resin composite with different shades upon exposure to water with different pH.
Materials and Methods: Nanohybrid resin composites (Filtek Z350XT, 3M ESPE) with four different shades (A2, A3, B1, and B2) were immersed in water with three different pH (pH 3, 6, and 9) for 14 day. The CIE L*a*b* color coordinates of the specimens were evaluated before and after immersion in the solutions. The color difference (ΔE*) and the translucency parameter (TP) were calculated using the color coordinates.
Results: ΔE* ranged from 0.33 to 1.58, and the values were affected significantly by the pH. The specimens immersed in a pH 6 solution showed the highest ΔE* values (0.87 - 1.58). The specimens with a B1 shade showed the lowest ΔE* change compared to the other shades. TP ranged from 7.01 to 9.46 depending on the pH and resin shade. The TP difference between before and after immersion in the pH solutions was less than 1.0.
Conclusions: The resulting change of color of the tested specimens did not appear to be clinically problematic because the color difference was < 1.6 in the acidic, neutral, and alkaline solutions regardless of the resin shade, i.e., the color change was imperceptible.
키워드
Color stability; Composite resin; pH; Resin shade; Translucency parameter
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