三种不同树脂材料治疗早期釉质龋的实验研究

The effects of three different resins on initial enamel caries

目的:比较渗透树脂(ICON)、流动树脂(Z350)、窝沟封闭剂3种树脂材料对早期釉质龋表面的处理效果。方法:选取新鲜拔除的牛切牙60个,模拟体外建立早期釉质龋模型后随机分为A、B、C、D 4组(n=15);其中A、B、C组分别用渗透树脂、Z350流动树脂及窝沟封闭剂进行处理,D组不作任何处理用于对照。处理结束后,分别测量各组样本表面的粗糙度、显微硬度及树脂的渗透深度。结果:各组样本表面粗糙度由高到低以此为:D组>B组>A组>C组,各组间相比差异均有统计学意义(P<0.05);各组样本表面显微硬度由高到低以此为:A组>B组>C组>D组,各组间相比差异均有统计学意义(P<0.05);各组对树脂的渗透百分比由高到低依次为:A组>B组>C组>D组,各组间相比,除B组和C组无统计学差异(P>0.05)外,其余各组间差异均有统计学意义(P<0.05)。结论:早期釉质龋样本经上述3种树脂处理后,其表面粗糙以窝沟封闭剂最低;表面显微硬度以渗透树脂最高,其树脂树脂渗透百分比高于Z350流动树脂及窝沟封闭剂。

AIM： To investigate the effects of infiltration resin ICON,flow resin Z350 and fissure sealant3 M on on early enamel caries. METHODS： 60 freshly extracted bovine teeth were randomly divided into 4 groups（ n = 15） after artificial enamel caries had been built. The samples were treated with ICON（ group A）,Z350（ group B） and 3M（ groups C） respectively,those in Group D received no treatmentad the controls. Enamel surface roughness,micro hardness and percentage of penetration were measured. RESULTS： Enamel roughness value was in the following order; group D 〉group B 〉group A 〉group C,（ between each 2 groups,P〈0. 05）; micro hardness value： group A 〉group B〉 group C〉 group D,（ between each 2 groups,P〈0. 05）; percentage of penetration depth were： group A〉 group B 〉group C 〉group D（ between each 2 groups,P〈0. 05 except group B vs. group C）.CONCLUSION： When applied on artificial enamel lesions,fissure sealant may produce the lowest surface roughness value. ICON may produce the highest micro hardness and percentage of the penetration value.