摘要
以ｐＨ均为４．５的０．０１％～５％氯化镧液及０．１％～２％氟化钠液处理人牙釉质块及釉质粉２４ｈ或４８ｈ，经原子吸收光谱分析发现Ｌａ^（３＋）的存在可加速釉质内Ｃａ^（２＋）溶出，且Ｌａ^（３＋）浓度越高Ｃａ^（２＋）溶出也越多，而Ｆ－的在在可明显阻抑釉质内Ｃａ^（２＋）溶出。但是，溶液浓度及作用时间的不同对釉质块表面及釉质粉内的反应生成物似无明显影响，经Ｘ线衍射分析发现，０．０１％～５％的氯化镧与人牙釉质作用后均有新的生成物出现，其中主要生成物为Ｃａ_８Ｌａ_２（ＰＯ_４）_６Ｏ_２，ＬａＰＯ_４，Ｌａ_７Ｐ_３Ｏ_（１８）及Ｌａ_４（Ｐ_２Ｏ_７）_３，而氟化钠与釉质作用后的主要生成物为Ｃａ_５（Ｐ，Ｓｉ，Ｓ）_３Ｏ_（１２）（Ｃｌ，ＯＨ，Ｆ），其次才是Ｃａ_５（ＰＯ_４）_３Ｆ及ＣａＦ_２。
Abstract In order to investigate the process of reaction and discover its products,the human enamel slabs and powdered enamel were treated with 0.01%～5%La solutions(pH=4.5)and 0.1%～2%F solutions(pH=4.5)for 24 or 48 hours.The results showed the presence of La accelerated the release of Ca,the higher the density of the La solutions,the more Ca was dissolved,but,the rresence of F inhibited the release of Ca.In addition, some new products were discovered in the enamel by X-ray diffractometry after the treatment of both solutions;The new compounds included mainly Ca8 La2(PO4)6O2,LaPO4,La7P3O18 and La4(P2O7)3 when the enamel was treated with 0.01%～5%La solutions,but when the enamel was treated with 0.1%～2%F solutions,the major products were Ca5(P,Si,S)3O12(Cl,OH,F),next.Ca5(PO4)3 F and CaF2.
出处
《华西口腔医学杂志》
CAS
CSCD
北大核心
1994年第2期92-96,共5页
West China Journal of Stomatology
