脱敏抛光膏对两种自酸蚀粘接剂粘接强度的影响  

Effect of a desensitizing polishing paste on bonding strength of two self-etching adhesives to dentin

作　　者：刘思颖[1] 王亚珂[1] 裴丹丹[3] 黄翠[2] 刘甜[4] 

机构地区：[1]武汉大学口腔医学院口腔基础医学省部共建国家重点实验室培育基地和口腔生物医学教育部重点实验室,430079 [2]武汉大学口腔医学院修复科,430079 [3]西安交通大学医学院附属口腔医院修复科 [4]武汉市中心医院口腔科

出　　处：《中华口腔医学杂志》2013年第3期165-169,共5页Chinese Journal of Stomatology

基　　金：国家自然科学基金（81070852、81171010）

摘　　要：目的研究含8％精氨酸．碳酸钙的脱敏抛光膏对两种自酸蚀粘接剂粘接强度的影响，以期为临床提供参考。方法将36颗离体前磨牙垂直于牙体长轴完全去除袷面牙釉质，采用随机数字表法随机分为3组（每组12颗）：空白对照组不进行处理，抛光粉组用浮石粉抛光牙本质面，脱敏抛光膏组用含8％精氨酸-碳酸钙的脱敏抛光膏抛光牙本质面。每组样本牙各采用随机数字表法随机分为两个亚组（每亚组6颗），分别使用两种自酸蚀粘接剂（A：G-Bond，含功能性单体；B：F1-BondⅡ）进行粘接以及树脂修复。光照固化后将样本牙置于37℃双蒸水中24h。冷热循环前及经5000次冷热循环后（每亚组冷热循环前后各制备15个试件），分别检测拉力峰值，计算粘接强度，并进行双因素方差分析。扫描电镜评价各组牙本质小管的封闭情况，并观察自酸蚀粘接剂处理后的牙本质面。结果对于粘接剂A，冷热循环前脱敏抛光膏组粘接强度[（46．88±7．83）MPa]与空白对照组[（38．19±4．42）MPa]、抛光粉组[（36．47±4．72）MPa]的差异均有统计学意义（P〈0．05）；冷热循环后脱敏抛光膏组粘接强度[（32．02±8．77）MPa]与空白对照组[（34．38±6．39）MPa]、抛光粉组[（32．22±5．25）MPa]的差异均无统计学意义（P〉0．05）。对于粘接剂B，无论冷热循环前还是冷热循环后脱敏抛光膏组粘接强度[分别为（31．53±4．86）和（24．25±3．67）MPa]与空白对照组[分别为（30．34±5．42）和（25．63±5．93）MPa]、抛光粉组[分别为（29．72±5．16）和（26．72±6．17）MPa]的差异均无统计学意义（P〉0．05）。扫描电镜下可见经脱敏抛光膏处理后，牙本质小管口被有效封闭。脱敏抛光膏联合自酸蚀粘接剂处理后牙本质小管口可重新打开，使用粘接剂A的管间牙本质表面可见均匀分布的絮状沉积物。结论含8�Objective To evaluate the effect of an 8% arginine-CaCO3 containing desensitizing polishing paste on bonding strength of two self-etching adhesives to dentin. Methods Thirty-six intact human premolars extracted for orthodontic reasons were collected within 1 month after extraction and randomly assigned into three groups using a table of random numbers （ n = 12 ） ： specimens without any treatment served as control. In the polishing powder group specimens were polished with a slurry of pumice, and in the desensitizing polishing paste group dentin surfaces of the sample teeth were treated with 8% arginine-CaCO3 containing desensitizing polishing paste. Then each group was divided into two sub-groups using a table of random numbers in order to evaluate the bonding strength of two self-etching adhesive agents （ G-Bond, GC; H-BondⅡ, Shofu ）. Microtensile bond strength test was conducted immediately and after 5000 thermocycling （n = 15）. Scanning electron microscope （SEM） was used to evaluate the occluding effect of the desensitizing polishing paste. Results In the pre- thermocyeling stage, there were no significant differences in Fl-Bond Ⅱ bonding strength among the three groups[ control： （30. 34 ± 5. 42） MPa, polishing powder group ： （29. 72 ± 5. 16） MPa, desensitizing polishing paste group：（31.53 ± 4. 86） MPal （P 〉 0. 05）. However there were significant differences among the three groups in G-Bond bonding strength [control： （38. 19 ± 4.42） MPa, polishing powder group： （36.47 ± 4.72） MPa, desensitizing polishing paste group： （46. 88 ±7. 83） MPa] （P 〈0. 05）. After thermocycling precess, there were no significant differences in bonding strenght among the three groups in both G-Bond groups and Fl-Bond Ⅱ groups. SEM observation showed that the desensitizing polishing paste could occlude open dentinal tubules effectively, and the application of self-etching adhesives could re-open the dentinal tubular orifices. An even layer can be seen on the de

关 键 词：牙本质过敏 牙本质脱敏剂 牙本质粘结剂 拉伸强度 

分 类 号：R783.1[医药卫生—口腔医学]