不同粘接剂去除方式对釉质微观结构及托槽抗剪切粘接强度的影响  

Effects of different adhesive removal methods on enamel microstructure and shear bond strength of brackets

作　　者：刘光俊 马锦锦 陶珂金 江静 冯剑颖[1,2] LIU Guangjun;MA Jinjin;TAO Kejin;JIANG Jing;FENG Jianying(School of Stomatology,Zhejiang Chinese Medical Universily,Hangzhou310053,China)

机构地区：[1]浙江中医药大学口腔医学院,浙江杭州310053 [2]浙江中医药大学附属口腔医院正畸科,浙江杭州310053

出　　处：《口腔医学》2022年第9期785-789,共5页Stomatology

基　　金：中国牙病防治基金会科研项目(A2021-128)。

摘　　要：目的 对比研究5种不同牙面残留粘接剂去除方式对釉质及托槽抗剪切粘接强度(shear bond strength, SBS)的影响。方法 选取66颗离体前磨牙,随机分为6组。A组:空白组,牙面不做任何处理;B组:金刚砂车针处理组;C组:绿砂石处理组;D组:慢速钨钢钻处理组;E组:慢速钨钢钻+抛光杯处理组;F组:慢速钨钢钻+硅粒子处理组,用上述处理方法对各组等量粘接剂样本进行磨除,记录操作时间,分别用扫描电镜和表面粗糙度仪对釉质表面进行定性和定量评价。各组处理样本粘接金属托槽后,应用万能力学测试仪检测各组托槽SBS,分析牙面粘接剂残留指数(adhesive residual index, ARI)。结果 B、C组去除效率较高,E组效率最低;扫描电镜显示F组处理后的釉质形态最接近正常牙釉质;F组表面粗糙度最低((0.48±0.13)μm),与A组无统计学差异(P>0.05);D组托槽再粘接强度最高((16.61±1.99)MPa),明显高于A组(P<0.05);各组托槽去除后的ARI指数无显著性差异(P>0.05)。结论 金刚砂车针及绿砂石去除效率较高,但对釉质损伤较大;慢速钨钢钻配合硅粒子抛光后对釉质的损伤最低,且去除效率在可接受范围;直接慢速钨钢钻处理后的牙面托槽SBS最高。Objective To compare the effects of five different removal methods of residual adhesive on enamel and brackets′ shear bond strength(SBS). Methods Sixty-six isolated premolars were randomly divided into 6 groups. Group A:blank group;Group B:diamondbur;Group C:green sandstone;Group D:slow tungsten carbide bur;Group E:slow tungsten carbide bur +tooth polishing cup;Group F:slow tungsten carbide bur + silicon particle. The same number of adhesive samples in each group were ground by the methodabove, and the operation time was recorded. The enamel surface was qualitatively and quantitatively evaluated by scanning electron microscope(SEM) and surface roughness instrument. After bonding metal brackets, the SBS of brackets in each group was measured by universal mechanical tester, and the adhesive residual index(ARI) was analyzed. Results The removal efficiency of group B and C was higher, and that of group E was the lowest. SEM showed that the enamel morphology of group F was closest to group A. The roughness of group F was the lowest((0.48±0.13)μm), which had no statistical difference with group A(P>0.05). The SBS of group D was the highest((16.61±1.99)MPa), which was statistically higher than group A(P<0.05). There was no significant difference in ARI index among all groups after bracket removal(P>0.05). Conclusion The removal efficiency of diamondburs and green sandstone is high, but they have great damage to enamel;slow tungsten carbide bur combined with silicon particle has the lowest damage to enamel, and the removal efficiency is acceptable. The SBS of the bracket treated with slow tungsten carbide bur is the highest.

关 键 词：粘接剂去除方式 牙表面粗糙度 抗剪切粘接强度 

分 类 号：R783.5[医药卫生—口腔医学]