氟化氨银溶液对人工脱矿牙本质粘接强度的影响

目的：评价氟化氨银溶液（silver diammine fluoride，SDF）对人工龋牙本质和玻璃离子粘固剂（glass ionomer cement，GIC）之间的微拉伸粘接强度的影响。方法：将12颗人离体磨牙制备成脱矿牙本质和未脱矿牙本质2组标本，均分为对照组、氟化氨银组及氟化氨银与光固化联合处理组（n ＝20），将处理完成的牙本质与 GIC 富士 IX 粘接，24 h 后对标本进行切割及微拉伸强度试验，最后用扫描电镜观察牙本质与 GIC 之间的超微结构，并进行数据统计分析。结果：脱矿后牙本质的粘接强度显著高于未脱矿的牙本质（P ＜0．01）。经过光固化 SDF 处理的人工龋牙本质的粘接强度数值显著高于只经 SDF 处理的人工龋牙本质的粘接强度（P ＜0．01）。结论：SDF 处理的人工脱矿牙本质与 GIC 之间的微拉伸粘接强度得到显著提高。

The effects of diammine silver fluoride solution on demineralized dentine adhesion ability

Objective:To investigate the effect of silver diamine fluoride(SDF)on the bonding strength between dentine and glass ion-omer cement(GIC).Methods:1 2 extracted sound molars were prepared into dintine samples and distributed into sound dentine group and demineralized dentine group.According to the treatment methods,the samples in each group were respectively divided into 3 sub-groups:A(control group),B[coated with 38% Ag(NH3 )F2 ]and C(SDF treatment with additional lighting-curing)(n =20).Then a hand-mixed conventional glass ionomer cement Fuji IX was placed on the dentine surface.After 24 h,micro tensile bond strength test and scanning electron microscope (SEM)analysis were conducted.Results:The bonding strength of demineralized dentine was higher than that of sound dentine(P <0.01 ).SDF with additional lighting-curing treated dentine showed a higer bonding strength value than only SDF treated dentin(P <0.01 ).Conclusion:SDF may improve the bonding between dentine and GIC.