摘要
目的评价一步法自酸蚀粘接剂的牙本质微拉伸粘接强度,观察并分析样本断裂类型。方法选择新拔除的人无龋下颌第三磨牙12颗,分别用3种一步法、1种两步法的自酸蚀粘接剂进行牙本质粘接。用微拉伸测力仪测试粘接强度,并用体视显微镜和扫描电镜观察样本断裂类型。结果 3种一步法自酸蚀粘接剂的微拉伸强度分别为:材料 A(Adper Prompt)(23.36±2.55)MPa;材料 B(Clearfil S^3 Bond)(30.46±3.82)MPa;材料 Cc(Xeno Ⅲ)(34.59±3.46)MPa;1种两步法自酸蚀粘接剂材料 D(Clearfil SsE Bond)的微拉伸粘接强度为(45.06±5.29)MPa。材料 D 微拉伸粘接强度最高,与其他3组相比,差异具有统计学意义(P<0.01)。样本断裂均发生于粘接界面,未观察到复合树脂或牙本质内聚破坏。结论一步法自酸蚀粘接剂的牙本质粘接强度低于两步法自酸蚀粘接剂,但多数仍可满足临床对树脂粘接强度的要求。
Objective To evaluate the microtensile bond strength of one-step self-etching adhesives to dentin in vitro. Methods Three commercially available one-step self-etching bonding systems（ group A： Adper Prompt, group B： Clearfil S^3 Bond, group C： Xeno Ⅲ ）were compared with two-step self-etching adhesive（ group D： Clearfil SE Bond） in this study. The microtensile bond strength was determined with microtensile tester and the fractured bonding surfaces were observed under stereomicroscope and scanning electronic microscope （SEM）. The mean bond strengths were analyzed using one-way ANOVA test （P 〈 0. 05）. Results Mean microtensile bond strengths of group C, B, A and D were （34. 59 ± 3.46 ）, （30. 46 ± 3. 82）, （23. 36 ± 2. 55 ） and （45. 06 ± 5.29 ） MPa, respectively. Group D showed the highest bond strength （P 〈 0. 01 ）. Condusions Two-step self-etching adhesive had a higher bond strength than one-step self-etching adhesive systems, although all of them can sitisfy the clinical requirements.
出处
《中华口腔医学杂志》
CAS
CSCD
北大核心
2007年第4期240-241,共2页
Chinese Journal of Stomatology
关键词
牙本质粘结剂
拉伸强度
复合树脂类
Dentin-bonding agents
Tensile strength
Composite resins
