渗透性树脂作用于脱矿釉质的扫描电镜观察

Electronic Structure of Infiltrating Resin Bonded on Decalcified Enamel

目的:用扫描电镜观察渗透性树脂作用于脱矿釉质表面的微观形态。方法:将离体牙12颗分为6颗健康釉质组,6颗脱矿釉质组。建立人工脱矿模型。对脱矿釉质表面进行光固化渗透树脂治疗,然后按照电镜标本制作要求,脱水喷碳,扫描电镜观察渗透性树脂使用套装中的盐酸凝胶对釉质表面处理前后及渗透性树脂作用于脱矿釉质表面的微观结构。结果:盐酸凝胶在健康牙釉质表面脱矿深度只有10μm左右,不会对健康釉质造成伤害;盐酸凝胶可以彻底清除脱矿釉质表面的钙化层,使渗透性树脂充分渗透入脱矿釉质体部,但在树脂突之间及釉质体部偶尔可见裂隙存在。结论:渗透性树脂可以在脱矿釉质表面形成规则的网状结构,良好的封闭了脱矿釉质表面。

Objective：To observe the micro structure of the infiltrating resin bonded on the decalcified enamel.Methods：Twelve extracted human molars were collected and divided into 2groups.The enamel of the teeth was healthy in one group and the enamel was decalcified in the other group.The decalcification model of the enamel was manually established,and then the infiltrating resin was applied on the surface of the decalcified enamel.The enamel before or after etched by hydrochloric acid gel and the adhesive interfaces of the resin and the enamel were observed using scanning electron microscope（SEM）.Results：The depth of decalcification was only about 10μm on the surface of the enamel of healthy teeth.The calcifying layer on the surface of decalcified enamel can be cleaned by the hydrochloric acid gel thoroughly,which facilitated the infiltrating resin penetrating into the decalcified enamel adequately.However,there were several intervals between the resin tags and the body of enamel.Conclusion：The infiltrating resin could penetrate into the micro-structure of decalcified enamel and form the reticular structure on the surface of the enamel which could seal the decalcified enamel.