Effect of immersion into solutions at various pH on the color stability of composite resins with different shades.
10.5395/rde.2015.40.4.270
- Author:
Ji Deok MOON
1
;
Eun Mi SEON
;
Sung Ae SON
;
Kyoung Hwa JUNG
;
Yong Hoon KWON
;
Jeong Kil PARK
Author Information
1. Department of Conservative Dentistry, School of Dentistry, Pusan National University, Dental Research Institute, Yangsan, Korea. jeongkil@pusan.ac.kr
- Publication Type:Original Article
- Keywords:
Color stability;
Composite resin;
pH;
Resin shade;
Translucency parameter
- MeSH:
Composite Resins*;
Hydrogen-Ion Concentration*;
Immersion*;
Water
- From:Restorative Dentistry & Endodontics
2015;40(4):270-276
- CountryRepublic of Korea
- Language:English
-
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 (DeltaE*) and the translucency parameter (TP) were calculated using the color coordinates. RESULTS: DeltaE* 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 DeltaE* values (0.87 - 1.58). The specimens with a B1 shade showed the lowest DeltaE* 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.
