两种不同处理方法对牙釉质结构及正畸托槽粘接强度的影响  

Effects of two different treatments on enamel structure and bond strength of orthodontic brackets

作　　者：高杨 张明 宫春梅[2] 

机构地区：[1]青岛市口腔医院,山东省青岛市266001 [2]潍坊医学院口腔医学院,山东省潍坊市261053

出　　处：《中国组织工程研究》2015年第38期6087-6091,共5页Chinese Journal of Tissue Engineering Research

摘　　要：背景:当前临床托槽黏结前处理牙釉质的方法有酸蚀与喷砂两种,但将喷砂技术直接用于未处理牙釉质面的研究较少。目的:观察酸蚀、喷砂处理方法对牙釉质表面的损伤程度,并比较两种不同牙釉质表面处理方法下金属托槽粘接强度的差异。方法:将9颗人正畸拔除前磨牙随机均分为3组,分别进行喷砂、酸蚀与抛光清洁处理,扫描电镜下观察牙体表面粗化效果。将40颗人正畸拔除前磨牙随机均分为2组,分别进行喷砂、酸蚀处理,粘接托槽24 h后,利用材料力学实验机测定剪切强度,并统计粘接剂残留指数。结果与结论:扫描电镜观察发现,抛光清洁处理组牙釉质表面光滑,无破坏;喷砂组与酸蚀组牙釉质遭到破坏,表面粗糙,并且喷砂组牙釉质的破坏程度更大。喷砂组粘接强度显著高于酸蚀组(P<0.05),喷砂组与酸蚀组的粘接剂残留指数比较差异无显著性意义(P>0.05)。表明相对于酸蚀处理,喷砂处理可提高牙釉质与托槽的粘接强度,但对牙釉质的破坏程度更大。BACKGROUND： There are two ways to treat the enamel before bracket bonding： etching and sandblasting, but the few studies focus on the direct use of sandblasting technology on untreated enamel surface. OBJECTIVE： To observe the damage of etching versus sandblasting to the enamel surface, and to compare the bonding strength of metal brackets adhesive to isolated teeth with these two kinds of surface treatments. METHODS：（1） Nine premolar teeth removed for orthodontic treatment were randomized into three groups： sandblasting, acid etching and polishing treatment groups. Surface roughening effects of these three kinds of treatments were observed under scanning electron microscope.（1） Another 40 premolar teeth removed for orthodontic treatment were randomized into two groups： sandblasting and acid etching groups. At 24 hours after bracket bonding, the shear strength was detected using mechanical testing machine, and the adhesive residue index of tooth surface was statistically calculated. RESULTS AND CONCLUSION：（1） Under the scanning electron microscope, polishing treatment had no damage to the enamel surface; but in the other two groups, the enamel surface was damaged to varying degrees, especially in the sandblasting group.（2） The bonding strength in the sandblasting group was significantly higher than that in the acid etching group（P〈0.05）, but there was no difference in the adhesive residue index of tooth surface between the two groups（P〉0.05）. These findings indicate that compared with the acid etchingtechnology, the sandblasting technology can increase the bonding strength between the enamel and metal bracket, but it also results in more damage.

关 键 词：酸蚀 牙 牙科粘固剂 正畸学 生物材料 口腔生物材料 喷砂 酸蚀 扫描电镜 粘接强度 表面处理 

分 类 号：R318[医药卫生—生物医学工程]