不同处理程序的镧、铈、氟对人牙根面防龋作用研究  

A comparative study of lanthanum, cerium and fluoride on the prevention of root surface caries by various procedure

作　　者：金晖[1,2] 张伟国[1,2] 刘瑷如[1,2] 

机构地区：[1]上海第二医科大学口腔医学院 [2]解放军第85医院口腔科

出　　处：《中华口腔医学杂志》1997年第3期143-145,共3页Chinese Journal of Stomatology

基　　金：卫生部资助

摘　　要：为明确两类防龋元素氟（Ｆ）与镧（Ｌａ）、铈（Ｃｅ）单独及联合应用的防龋效果，本研究在模拟口腔ｐＨ循环变化的环境中，分别用含Ｌａ、Ｃｅ、Ｆ的脱矿液对离体人牙根面进行不同处理程序的抑制脱矿和促进再矿化的实验。经用偏光显微镜和电子探针研究表明：联合应用Ｆ与镧系元素处理的根面，其脱矿深度较用同样浓度单独含Ｌａ、Ｃｅ或Ｆ的脱矿液处理者浅，且前者在根面形成的表面层中可能有Ｆ－Ｌａ（Ｃｅ）－Ｃａ的化合物生成，它在抗酸实验中显示了较强的抗酸性。作者从晶体物理化学的角度对其进行了讨论。In order to evaluate the anticaries effects of several trace elements by combined and respective treating procedure, studies on inhibiting demineralization and improving remineralization were carried out with lanthanum, cerium and fluoride in a pH cycling condition. The analysis of polarized microscope and electron microprobe demonstrated that the lanthanum and fluoride to an acetate buffer solutions had less severe demineralization of root surface than individual lanthanum or fluoride to the solution. The former, furthermore, precipitated a compound membrane which may be F La(Ce) Ca containing crystal on the root surface, and showed a better resistibility to acid. A further discussion was made from the viewpoint of crystal physiochemistry.

关 键 词：龋齿 预防 牙根面 镧 铈 氟 

分 类 号：R780.1[医药卫生—口腔医学]