脱敏剂对牙本质粘接剂剪切粘接强度的影响  

Effect of desensitizer on shear bond strength of adhesive system

作　　者：郑明[1] 程辉[1] 陈文多[1] 李秀容[1] 胡志刚[1] 马守治[1] 

机构地区：[1]福建医科大学口腔医学院口腔修复科,福州350002

出　　处：《中华口腔医学杂志》2008年第5期306-307,共2页Chinese Journal of Stomatology

基　　金：福建省科技计划（2003Y024）

摘　　要：目的研究脱敏剂对牙本质粘接剂剪切粘接强度的影响，以期为临床操作提供参考。方法将20个牙试件均分为实验组和对照组，每组10个；实验组牙本质表面涂布脱敏剂（极固宁^TM）；对照组不做任何处理。用牙本质粘接剂（Variolink Ⅱ）将铸瓷（IPS Empress）粘接于两组试件牙本质粘接面上，测试剪切粘接强度，扫描电镜（SEM）观察试件断面。结果实验组和对照组的剪切粘接强度分别为（5．53±0．96）MPa和（7．32±1．34）MPa，差异有统计学意义（P=0．003）。SEM见实验组试件发生黏附破坏，对照组试件发生内聚破坏。结论牙本质表面涂布脱敏剂后可显著降低粘接剂的剪切粘接强度。Objective To evaluate the effect of desensitizer on shear bond strength of adhesive system. Methods Twenty specimens were made and divided randomly into an experiment group and a control group. In the experiment group, the dentin bonding surface was applied with Green OrTM and in the control, the dentin bonding surface was untreated. The IPS-Empress specimens were bonded to the dentin bonding specimens using Variolink Ⅱ adhesive system. The shear bond strength of all testing samples was determined with Instron testing machine. The surfaces of the drawing sections were observed using the scanning electron microscope （SEM）. Results The shear bond strength of the experimental group and the control group was （ 5. 53 ± 0. 96 ） MPa and （ 7. 32 ± 1.34 ） MPa respectively and there was statistically significant difference between two groups （ P = 0. 003 ）. In the experimental group, adhesive failure was the most prevalent type of failure, while in the control group, cohesive failure was the most prevalent type. Conclusions The application of Green OrTM on the dentin bonding surface decreased the shear bond strength between dentin and IPS-Empress specimens when using Variolink Ⅱ adhesive system.

关 键 词：牙本质黏结剂 显微镜检查 电子 扫描 抗剪切强度 脱敏剂 

分 类 号：R686[医药卫生—骨科学]