渗透剂在牙酸蚀症渗透性的实验研究

李春梅，王馨黑龙江省医院口腔科，黑龙江哈尔滨　150001

渗透剂在牙酸蚀症渗透性的实验研究

李春梅，王馨
黑龙江省医院口腔科，黑龙江哈尔滨150001

目的探讨可能影响渗透剂在牙酸蚀症渗透效果的多种因素以及各因素的作用效果。方法48颗无酸蚀症离体下切牙（2015年9月—2016年3月，黑龙江省医院口腔科），置于脱矿液中45 d建立酸蚀症模型，再随机分为16组，分别采用不同渗透剂（粘结剂和渗透树脂）和渗透时间（5 min和3 min）、不同酸蚀剂（35%磷酸和15%盐酸）和酸蚀时间（30 s和60 s）进行处理。染料浸染和激光扫描共聚焦显微镜观察渗透剂的渗透深度（PD）和酸蚀症的酸蚀症损深度（LD），并计算渗透百分数（PP）。结果渗透剂种类（粘结剂和渗透树脂）、渗透时间（5 min和3 min）对渗透剂的渗透性差异有统计学意义（P＜0.05），且相同作用时间下渗透树脂的渗透性优于粘结剂的渗透性；相同渗透剂渗透作用5 min比3 min的渗透效果更好。酸蚀剂种类（30%磷酸和10%盐酸）、酸蚀时间（30 s和60 s）对渗透剂的渗透性差异无统计学意义（P＞0.05）。结论在牙酸蚀症相同作用时间下渗透树脂的渗透性优于粘结剂的渗透性；相同渗透剂渗透作用5 min比3 min的渗透效果更好。

酸蚀症；渗透剂；粘结剂

［Abstract］Objective To explore the factors that might affect the penetration and their effects on the permeability of infiltrants in acid corrosion of youngteeth.Methods 48 extracted youngmandibular incisors were placed 45 d in the decalcification solution to establish early caries model（Department of Stomatology，Heilongjiang Hospital，September 2015-March，2016），and then randomly divided into 16 groups，with different resin materials and methods for penetration.Penetration depth（PD）and early caries lesions depth（LD）were observed，and the percentage penetration（PP）were calculated by dying infiltration and laser scanning confocal microscopy（CLSM）.Analysis of the effect of resin materials and penetration time，etching agents and acid etching time on penetration were performed.Results The two factors of penetration time and type of resin materials were proved significantly affected the permeability of infiltrants（P＜0.05），and permeability of Icon-infiltrant was found better than Single Bond 2；penetration in 5 min was found better than 3 min. Etching agents，etching time two factors were proved significantly affected the permeability of resin materials（P＞0.05）. Conclusion Permeability of Icon-infiltrant in acid corrosion of youngteeth is better than Single Bond 2；penetration of resin materials in 5min is better than 3 min.

［Key words］Acid corrosion；Resin infiltration；Adhesive

酸雾或酸酐作用于牙而造成的牙硬组织损害称为酸蚀症。渗透技术是治疗酸蚀症的微创治疗方法之一［1］。自20世纪70年代以来，渗透技术作为治疗酸蚀症的一种最小干预治疗已被广泛研究。最早的渗透剂是粘结剂［2］，近年报道了新型渗透剂—Icon渗透树脂。与粘结剂相比，渗透树脂具有高渗透性系数、低粘性、低接触角和高表面张力，能通过釉质表面孔隙渗透到脱矿层内。……