Wang Xiaojie, Mihailova Boriana, Klocke Arndt, Fittschen Ursula E A, Heidrich Stefanie, Hill Mathias, Stosch Rainer, Güttler Bernd, Broekaert José A C, Bismayer Ulrich
Mineralogisch-Petrographisches Institut, University of Hamburg, Grindelallee 48, D-20146 Hamburg, Germany.
J Biomed Mater Res A. 2009 Jan;88(1):195-204. doi: 10.1002/jbm.a.31843.
Changes in the chemistry and structure of enamel due to a non-peroxide-based home bleaching product (Rapid White) were studied in vitro using attenuated total reflectance-infrared spectroscopy, Raman spectroscopy, electron probe microanalysis, flame atomic absorption spectroscopy, and total reflection X-ray fluorescence. The results revealed that the citric-acid-containing gel-like component of the bleaching system substantially impacts on the dental hard tissue. Enamel is affected on several levels: (i) the organic component is removed from superficial and deeper enamel layers and remnants of the bleaching gel are embedded in the emptied voids; (ii) cracks and chemical inhomogeneities with respect to Ca and P occur on the surface; and (iii) within a submicron layer of enamel, the Ca-O bond strength in apatite decreases, thus enhancing calcium leakage from the bleached enamel hard tissue.
利用衰减全反射红外光谱、拉曼光谱、电子探针微分析、火焰原子吸收光谱和全反射X射线荧光光谱，在体外研究了一种非过氧化物家用漂白产品（快速美白）引起的牙釉质化学和结构变化。结果表明，漂白系统中含柠檬酸的凝胶状成分对牙齿硬组织有显著影响。牙釉质在几个层面受到影响：（i）有机成分从牙釉质表层和深层被去除，漂白凝胶的残余物嵌入排空的空隙中；（ii）表面出现裂纹以及钙和磷的化学不均匀性；（iii）在牙釉质的亚微米层内，磷灰石中的钙-氧键强度降低，从而增加了漂白牙釉质硬组织中的钙泄漏。
