Cavalli V, Arrais C A G, Giannini M, Ambrosano G M B
Department of Restorative Dentistry, University of Campinas, Piracicaba School of Dentistry, Piracicaba, Brazil.
J Oral Rehabil. 2004 Feb;31(2):155-9. doi: 10.1111/j.1365-2842.2004.01138.x.
Concern has been expressed regarding the adverse effects of peroxide-containing tooth bleaching agents on enamel surface. This study examined enamel average surface roughness before (baseline) and after an in-office bleaching protocol and investigated the influence of high concentrations of carbamide peroxide gels on its surface staining and morphology. Flat enamel surfaces were submitted to 35 and 37% carbamide peroxide or to no bleaching treatment (n = 10) and evaluated with a profilometer. Eight specimens from each group were randomly selected and immersed in a 2% methylene blue solution. Afterwards, specimens were ground into powder and prepared for the spectrophotometric analysis. Two remained specimens of each group were examined using a scanning electron microscope. Data were subjected to analysis of variance and Tukey test (P > 0.05). Baseline roughness average was statistically similar for all groups, however, 35% carbamide peroxide produced the roughest enamel surfaces. Different concentrations of carbamide peroxide produced similar staining means and enamel surface morphological alterations.
人们已对含过氧化物的牙齿漂白剂对牙釉质表面的不良影响表示关注。本研究检测了诊室漂白方案实施前后牙釉质的平均表面粗糙度，并研究了高浓度过氧化脲凝胶对其表面染色和形态的影响。将平整的牙釉质表面分别用35%和37%的过氧化脲处理，或不进行漂白处理（n = 10），并用轮廓仪进行评估。每组随机选取8个样本，浸入2%的亚甲蓝溶液中。之后，将样本研磨成粉末，准备进行分光光度分析。每组剩余的2个样本用扫描电子显微镜进行检查。数据进行方差分析和Tukey检验（P > 0.05）。所有组的基线粗糙度平均值在统计学上相似，然而，35%的过氧化脲使牙釉质表面最粗糙。不同浓度的过氧化脲产生了相似的染色均值和牙釉质表面形态改变。
Zotero 插件