12-Month color stability of enamel, dentine, and enamel-dentine samples after bleaching
12-Month color stability of enamel, dentine, and enamel-dentine samples after bleaching
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DOI：
10.1007/s00784-008-0195-7
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发表时间：
2008-12-01
影响因子：
3.4
通讯作者：
Attin, Thomas
中科院分区：
文献类型：
--
作者：
Wiegand, Annette;Drebenstedt, Steffi;Attin, Thomas
本研究旨在量化体外12个月内不同漂白艾德样本的釉质（E）、牙本质（D）和釉质-牙本质联合体（艾德）的颜色消退。从牛牙齿的唇表面获得两个艾德样品，并制备成标准厚度，其中牙釉质和牙本质层各1 mm。将艾德样品分布在四组中（每个n=80），其中将不同的漂白产品应用于牙釉质上（1，Whitestrips; 2，Illumine 15%; 3，Opalescence Xtra Boost）或牙本质表面（4，过硼酸钠/蒸馏水的混合物）。80个艾德样本未漂白（对照）。在基线、随后的漂白后和漂白后储存3、6和12个月时（每组20个样品）评估艾德的颜色（L*a*B*）。E和D样品通过去除艾德样品的牙本质或釉质层以允许单独的颜色分析来制备。漂白导致艾德标本的显着颜色变化（Δ E）。在观察期内，Delta L下降至基线，但Delta B未下降至基线。E和D样品的L* 值也下降，12个月后与对照样品无显著差异，而B* 值未降至基线。通常，在漂白剂之间没有观察到差异。关于亮度，体外漂白牙齿样品的釉质、牙本质和组合艾德的颜色变化随时间不稳定。然而，黄度在1年内没有恢复到基线。
The study aimed to quantify the color regression of enamel (E), dentine (D), and combined enamel-dentine (ED) of differently bleached ED specimens over a period of 12 months in vitro. Two ED samples were obtained from the labial surfaces of bovine teeth and prepared to a standardized thickness with the enamel and dentine layer each 1 mm. The ED samples were distributed on four groups (each n=80), in which the different bleaching products were applied on enamel (1, Whitestrips; 2, Illumine 15%; 3, Opalescence Xtra Boost) or dentine surfaces (4, mixture of sodium perborate/distilled water). Eighty ED samples were not bleached (control). Color (L*a*b*) of ED was assessed at baseline, subsequently after bleaching and at 3, 6, and 12 months of storage after bleaching (each 20 samples/group). E and D samples were prepared by removing the dentine or enamel layer of ED samples to allow for separate color analysis. Bleaching resulted in a significant color change (Delta E) of ED specimens. Within the observation period, Delta L but not Delta b declined to baseline. L* values of E and D samples also declined and were not significantly different from control samples after 12 months, while b* values did not decrease to baseline. Generally, no differences between the bleaching agents could be observed. Color change of enamel, dentine, and combined ED of in vitro bleached tooth samples is not stable over time with regard to lightness. However, yellowness did not return to baseline within 1 year.