Effects of hydrogen peroxide on the light reflectance and morphology of bovine enamel

被引:90
|
作者
Kwon, YH
Huo, MS
Kim, KH [1 ]
Kim, SK
Kim, YJ
机构
[1] Kyungpook Natl Univ, Coll Dent, Dept Dent Biomat, Taegu 700422, South Korea
[2] Kyungpook Natl Univ, Coll Dent, Dept Conservat Dent, Taegu 700422, South Korea
[3] Kyungpook Natl Univ, Coll Dent, Dept Pediat Dent, Taegu 700422, South Korea
关键词
bovine enamel; hydrogen peroxide; light reflectance; SEM;
D O I
10.1046/j.1365-2842.2002.00856.x
中图分类号
R78 [口腔科学];
学科分类号
1003 ;
摘要
The purpose of this study was to examine the effects of a bleaching agent (30% hydrogen peroxide) on the surface of bovine enamel using a scanning electron microscope and a UV-VIS-NIR spectrophotometer. Five non-carious bovine incisors were bleached for 0, 1, 2 and 3 days using 30% hydrogen peroxide. The light reflectance spectrum was measured using a spectrophotometer with diffuse reflectance mode. Colour values and colour differences in the teeth were evaluated from the reflectance measurements with the CIE L*a*b* colour coordinate system. Surface alterations in the bleached and unbleached teeth were studied using a scanning electron microscope. The change of reflectance in the teeth was related to the change of colour. Most reflectance change occurred within a 1-day bleaching, and this result was confirmed by a CIE L*a*b* colour coordinate system. The colour differences in the bleached teeth were significant enough to be perceived by the observer's eye. The comparison of bleached to unbleached bovine enamel revealed that the bleached surface showed non-uniform slight morphological alterations, and it developed varying degrees of surface porosity. This study indicates that the bleached bovine teeth showed apparent colour differences as well as slight morphological alterations after bleaching.
引用
收藏
页码:473 / 477
页数:5
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