氟保护漆Duraphat对恒牙釉质再矿化影响的体外研究

摘要

Objective: To study Duraphat fluoride varnish on the remineralization of demineralized permanent enamel by carbonated beverages. Methods: 30 permanent premolar teeth from 12 to 25 years old young people were collected from orthodontic extraction. Enamel blocks were prepared from each tooth and randomly divided into group A (Coco cola), B(deionized water), C(Coco cola + Duraphat), D(Coco cola + 2％ NaF) and E(Coco cola + artificial saliva) (n = 15), the specinens were respectively treated for 7 d. The enamel surface were observed by scanning electron microscope(SEM). The Ca2 + and P3 + content(weight percentage) were detected by energy spectrum analyzer. Results: The surface of permanent enamel of group A showed a characteristic honeycomb-like appearance, that of group B were smooth. Group C showed irregular large globule deposits on the surface, group D showed some globule structures on the surface, group E showed a little deposits on the surface. Ca2 + and P3 + content of group A was lower than that of group B, in group C was higher than in group E(P＜ 0. 05). Ca2 + content in group D was higher than that in group E(P＜ 0. 05). Conclusion: Duraphat fluoride varnish can promote the remineralization of demineralized permanent enamel by carbonated beverage.%目的: 体外研究氟保护漆Duraphat 对碳酸饮料引起恒牙釉质脱矿后再矿化的影响及作用.方法: 选择12 ～ 25 岁因正畸减数拔除的前磨牙30 颗,制备釉质切片,分为A 组(可口可乐) 、B 组(去离子水) 、C 组(可口可乐+ Duraphat) 、D 组(可口可乐+ 2％NaF) 、E 组(可口可乐+ 人工唾液) (n = 15) ,进行为期7 d 的相应处理.扫描电镜观察恒牙釉质表面形态变化,X线能谱分析釉质表面的钙、磷水平变化.结果: 扫描电镜显示A 组釉质表面粗糙,呈蜂窝状外观,B 组釉质表面平坦,C 组釉质表面见大面积沉积物,D 组釉质表面见细小的沉积物,E 组釉质表面见少许沉积物.钙、磷水平A 组低于B 组、C 组高于E组(P＜ 0. 05) .钙水平D 组高于E 组(P＜ 0. 05) .结论: 碳酸饮料处理对恒牙釉质具有脱矿作用;氟保护漆Duraphat 可促进碳酸饮料引起恒牙釉质脱矿的再矿化.