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http://dx.doi.org/10.5395/JKACD.2009.34.4.309

INFLUENCE OF THE COLOR OF COMPOSITE RESINS APPLIED TO LINGUAL SURFACE ON THE LABIAL TOOTH COLOR  

Mun, Seung-Hui (Dept. of Conservative Dentistry, School of Dentistry, DSRI, Chonnam Natl. Uni.)
Park, Su-Jung (Dept. of Conservative Dentistry, School of Dentistry, DSRI, Chonnam Natl. Uni.)
Cho, Hyun-Gu (Dept. of Conservative Dentistry, School of Dentistry, DSRI, Chonnam Natl. Uni.)
Hwang, Yun-Chan (Dept. of Conservative Dentistry, School of Dentistry, DSRI, Chonnam Natl. Uni.)
Oh, Won-Mann (Dept. of Conservative Dentistry, School of Dentistry, DSRI, Chonnam Natl. Uni.)
Hwang, In-Nam (Dept. of Conservative Dentistry, School of Dentistry, DSRI, Chonnam Natl. Uni.)
Publication Information
Restorative Dentistry and Endodontics / v.34, no.4, 2009 , pp. 309-323 More about this Journal
Abstract
In this study we evaluated the influence of both the thickness of residual enamel and the color of the composite resins applied to lingual surface on the labial surface color. Background plates were made by randomly (A1, A2, A6D, B1, B2, B3, C1, C2, C6D) selected colors of Filtek Supreme (3M ESPE, St. Paul, U.S.A.) composite resin. Crown portion of 9 maxillary central incisors were cut off and embedded with acrylic resin except labial surface. Samples of average thickness of 2.2 mm were obtained after cutting it in a thickness of 2.5 mm from the labial surface and sandpaper polish. The shade of composite resin background was measured using Spectrophotometer ($Spectrolino^{(R)}$, GretagMacbeth, Regensdorf, Switzerland). And CIE $L^{\ast}a^{\ast}b^{\ast}$value of 2.2 mm thickness tooth samples were measured on the 9 composite resin backgrounds. And then, the cutting side of tooth samples was ground to the extent of 1.9 mm, 1.6 mm, 1.3 mm, 1.0 mm and placed on composite resin backgrounds and measured $L^{\ast}a^{\ast}b^{\ast}$values with the same method. In all samples, $L^{\ast}$value and $b^{\ast}$value seemed to have a tendency of decreasing as thickness of tooth sample becomes thinner regardless of background colors (p < 0.05). But, $a^{\ast}$value didn't show the significant differences depending on the thickness.
Keywords
tooth color; resin color; colorimeter; enamel color; background color;
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