摘要
目的:对比研究四种临床常用牙本质粘结剂的边缘封闭性能。方法:在20个离体人恒磨牙颊、舌侧牙颈部各制备3 mm×2 mm×2 mm的箱型V类洞。制备的窝洞随机分为4组,分别以全酸蚀粘结剂Prime&BondNT和Single Bond,自酸蚀粘结剂Adper Prompt和Clearfil SE Bond粘结,Charisma复合树脂充填。0.5%碱性品红溶液中染色24 h后,将充填体连续纵向剖开为四部分,体视显微镜下观察各剖面充填体边缘的微渗漏情况,并以扫描电镜观察树脂-牙本质界面的结合状态。结果:各种粘结剂均存在微渗漏现象,龈方微漏程度显著高于冠方(P<0.05)。各种粘结剂之间的微漏程度无显著性差异(P>0.05)。电镜下各组界面均存在散在间隙,全酸蚀粘结剂形成的混合层较自酸蚀者厚,树脂突亦较长。结论:多剖面评分法较常规正中剖面法能更全面地评价界面的微漏情况;各种粘结剂均不能完全消除充填体边缘微漏。
Objective： To evaluate the marginal sealability of resin-dentin interface of four frequently used dentin adhesive systems. Method：Box-shaped Class Ⅴ cavities were prepared in the buccal and lingual surfaces of 20 recently extracted human molars. The preparations were randomly assigned to four groups according to the adhesive systems used （Prime＆Bond NT, Single Bond, Adaper Prompt, Clearfil SE bond） （n = 10）, and then restored with Charisma filling composite resin. After dye penetration for 24 h with 0.5 % basic fuchsin solution, the restorations were then serially multi-sectioned. Microleakage was scored on each section under stercomicroscopy and the resin-dentin interface was also examined with SEM. Result： Microleakage was presented in all groups, which was much severer at the gingival margin than that at the coronal margin （ P〈 0.05 ）. No statistical difference was shown among groups. Several micro gaps were shown at the interface of each group; the hybrid layer formed by total etching adhesives was much thicker than that of self etching adhesives. Conclusion： Evaluation of microleakage with multi-sections of the whole interface was more comprehensive than with conventionally medial section. All of the adhesive systems used in this study showed the occurrence of microleakage.
出处
《临床口腔医学杂志》
2006年第1期10-12,共3页
Journal of Clinical Stomatology
基金
国家自然科学基金资助项目(30371556)
关键词
牙本质粘结
微渗漏
自酸蚀
dentin bonding
microleakage
self-etching
