含镧、铈凝胶对牙根面抗酸蚀作用的扫描电镜观察  

A SEM observation of acidresistant effect of lanthanum and ceriumcontained gel on dental root surface

作　　者：潘益华[1] 张濒[1] 

机构地区：[1]上海第二医科大学口腔医学院口腔内科教研室

出　　处：《上海口腔医学》1999年第2期67-69,共3页Shanghai Journal of Stomatology

摘　　要：目的观察含镧、铈凝胶的抗酸蚀作用。方法３０枚牙釉质－牙骨质块在ｐＨ循环条件下用含２０００ｐｐｍ镧（Ｌａ）、铈（Ｃｅ）和氟（Ｆ）凝胶处理５ｄ，进一步酸蚀２４ｈ。结果在Ｆ／Ｌａ和Ｆ／Ｃｅ组处理的牙表面可见有球形颗粒覆盖，２４ｈ的酸蚀可使这些颗粒消失，但牙表面仍完好，然而对照组则出现明显的酸蚀现象，即托姆突（ＴＰＰ）点隙增大，部分晶体溶解。结论含２０００ｐｐｍ镧，铈和氟联合应用具有很强的抗酸蚀能力，并认为这可能和Ｌａ（Ｃｅ），Ｃａ，Ｆ化合物的形成有关，这为其在临床上的应用提供了理论和实验依据。Objective The present study was to investigate the acidresistant effect of lanthanum,ceriumcontained gel. Methods 30 of enamelcementum slabs were treated individually with 2000ppm lanthanum,cerium and fluoridecontained gel in a pHcycle condition for 5 days and etched with acetic buffer gel for 24 hours. Results There were spherical grains coating layers on the surface of enamel or cementum surfaces treated with F/La and F/Ce groups.24hour successive etching made the grains disappeared,and still showed the sound surfaces.However,there were obvious etching feature in control group,which showed the enlarged Tome's process pits as well as the dissolved crystals. Conclusion Combined treatment procedure of 2000ppm F and La(Ce)gel showed the strong acidresistant ability,which suggested that La(Ce)CaF compounds play an important role,and established the foundation theoretically and experimentally for the clinical application.

关 键 词：镧 铈 氟 根面 酸蚀 扫描电镜 凝胶 

分 类 号：R781.101[医药卫生—口腔医学]