摘要
目的:比较乙醇湿粘接和水湿粘接对髓腔牙本质粘接强度及耐久性的影响。方法:选取32颗离体牙去除髓腔顶暴露髓腔,去除牙髓组织,封闭根管口。随机分为4组(n=8),分别采用传统水湿粘接和乙醇湿粘接技术,用乙醇/水基Single Bond 2(SB)和丙酮基One Step(OS)两种全酸蚀粘接剂进行髓腔牙本质与树脂粘接。每组均制取32个微拉伸试件样本,分别进行即刻微拉伸测试(24 h)和模拟老化实验(6 m/3000 TC),扫描电子显微镜(SEM)观察断面破坏模式。结果:乙醇湿粘接条件下,两种粘接剂24 h时所获得的粘接强度均比水湿粘接条件下高,差异有统计学意义(P<0.05),老化实验后粘接强度均无明显下降,差异无统计学意义(P>0.05)。SEM观察见两种粘接剂老化实验前后均多发生混合破坏,差异无统计学意义(P>0.05)。水湿粘接条件下,OS组在24 h时所获得的粘接强度较SB组高,差异有统计学意义(P<0.05),老化实验后两种粘接剂的粘接强度均明显下降,差异有统计学意义(P<0.05)。结论:与传统水湿粘接比较,乙醇湿粘接可获得较好的髓腔牙本质即刻粘接强度及粘接耐久性。
Objective：To compare the effects of ethanol-wet bonding and water-wet bonding technique on the resin bond strength and durability to the pulp chamber dentin. Methods：Thirty-two extracted human impacted third molars were cut horizontally to expose the pulp chamber with pulp tissues were removed and the canal orifices were sealed. They were randomly divided into 4 groups（n = 8）. The techniques of ethanol-wet bonding and water-wet bonding by using ethanol/waterbased adhesive Single Bond 2 （SB）and acetone-based adhesive One Step （OS）were applied in the pulp chamber dentin-resin bonding experiments. Thirty-two micro tensile samples in each group were tested in the micro tensile tester immediately and aging test of 6 months and 3000 thermal cycles. Each fractured sample was examined by SEM. Results： For the ethanol wet- bonding groups, the 24 h bond strength of the two etch-and-rinse adhesives were significantly higher than those of their water wet-bonding controls （ P 〈 0.05 ）, and after accelerated aging, no decreases in bond strengths were observed （ P 〉 0. 05 ）. The SEM observation showed that in the ethanol wet-bonding groups, most of the fractured modes were mixed failures, there was no significantly difference before and after accelerated aging （ P 〉 0.05 ）. For the water wet-bonding groups, the 24 h bond strengths of SB group were significantly higher than OS group （ P 〈 0.05 ）. But both of them were significantly decreased after accelerated aging （ P 〈 O. 05 ）. Conclusion ： Comparing to water wet-bonding, ethanol wet-bonding can improve the bond strength and bond durability to the pulp chamber dentin.
出处
《临床口腔医学杂志》
2017年第4期199-203,共5页
Journal of Clinical Stomatology
关键词
髓腔牙本质
乙醇湿粘接
粘接界面
微拉伸强度
粘接耐久性
Pulp chamber dentin
Ethanol-wet bonding
Bonding interface
Micro tensile bonding strength
Bond durability
