低浓度钙离子对抗橙汁牙釉质酸蚀作用初探

摘要

目的：探讨添加低浓度钙离子对橙汁酸蚀牙釉质的影响。方法：45颗离体前磨牙随机分为无添加组、钙离子加强组，空白对照组3组，每组15颗，分别浸泡于橙汁、加钙橙汁（0．4 g/L乳酸钙）和去离子水中25 h，每5 h换液；使用电子酸度计测定每组液体pH，使用激光荧光诊断仪对釉质脱矿程度进行定量分析。结果：无添加组和钙离子加强组离体牙实验后荧光值均显著高于空白对照组（P＜0．05），钙离子加强组离体牙实验后荧光值显著低于无添加组（P＜0．05）。结论：添加钙离子可显著对抗橙汁对牙釉质的酸蚀作用。%Objective:To evaluate the erosive potential of orange juice modified by calcium .Methods:45 permanent teeth were ran-domly divided into there groups ,and were immersed in orange juice ,orange juice modified by calcium (0.4 g/L,calcium lactate penta-hydrate),and deionized water respectively for 25 hours.A laser fluorescence system was used to make a quantitative record .Results:The experiment showed that the group of orange juice and orange juice modified by calcium showed significant higher laser fluorescence value than the group of deionized water (P<0.05).Orange juice modified by calcium showed significant lower laser fluorescence value than orange juice group (P<0.05).Conclusions:Calcium ion could significantly reduce the erosion potential of orange juice .