空气喷磨处理氟斑牙牙釉质对树脂粘接强度的影响

The effect of air abrasion on adhesive strength of mottled enamel-composite resin

目的:检测空气喷磨处理对氟斑牙牙釉质与复合树脂间粘接强度影响。方法:根据Dean氏分类标准,选择15颗完整无龋坏的氟斑牙患者因正畸需要拔除的第一前磨牙为研究对象,随机分为A(单纯酸蚀)、B(单纯喷磨)、C(喷磨加酸蚀)三组进行釉质表面处理后粘接树脂,采用微拉伸粘接强度实验测定三组试件的微拉伸粘接强度。结果:A、B、C三组牙釉质粘接树脂后的微拉伸粘接强度分别为(23.48±5.71)MPa、(16.55±3.52)MPa、(29.24±4.61)MPa,各组微拉伸粘接强度平均值间差异有统计学意义(P<0.01)。结论:采用空气喷磨加酸蚀预处理氟斑牙牙釉质可以提高氟斑牙牙面与复合树脂的粘接力。

Objective：To evaluate the resin adhesive strength of mottled enamel to composite resin with the effect of air abrasion in vitro.Methods：According to the Dean＇s index,fifteen first bicuspid extracted teeth with fluorosis from patients needing orthodontic force were prepared and divided into 3 groups（n=5）：group A（the enamel was prepared with acid-etched）,group B（the enamel was prepared with air abraded）,group C（the enamel was prepared with air abraded and acid-etched）.All the groups were bonded with composite resin.The microtensile bond strength was examined and compared by analysis of variance.Results：The microtensile bond strength of group A was（23.48±5.71） MPa,group B was（16.55±3.52） MPa,group C was（29.24±4.61） MPa.A significant difference in microtensile bond strength were found among three groups（P0.01）.Conclusions：The adhesive strength of mottled enamel to composite resin could be improved with using air abrading and acid etching as a pretreatment method of fluorosis enamel.