效前挥发对乙醇基牙本质粘接剂微拉伸强度的影响

目的：研究含有乙醇的牙本质粘接系统在较长时间的多次使用后，效前挥发对其微拉伸粘接强度的影响。方法：选用两种含有丙酮乙醇的牙本质湿粘接系统OptiBond Solo和Single Bond，每天在9时和15时各打开密封盖1min，分别测试和比较各粘接系统在第0d、7d、14d和21d时的微拉伸强度。结果：两种粘接系统OptiBond Solo和Single Bond的微拉伸粘接强度随使用时间的延长和使用频率的增加虽然有下降的趋势，但在4个测试点的强度没有显著差异。结论：短时间多次使用后的效前挥发对部分含有乙醇的牙本质粘接系统的粘接强度影响较小。

Effect of premature vaporization on microtensile strengths of alcohol-based dentin bonding adhesives

Objective:To study the influences of premature vaporization on microtensile bonding strength of alcohol-based dentin bonding systems.Method :Two alcohol-based wet bonding systems,OptiBond Solo and Single Bond,were used to bond Chrisma composite resin to moist dentin surface.The adhesive bottles were opened for 1 minute at 9 and 15 o'clock every day.Microtensile strengths of the first day,the seventh day,the fourteenth day and the twenty-first day of different adhesives were measured with Instro 1195.Result:The microtensile strengths of these two adhesives had no significant difference at 0 day,the seventh day,the fourteenth day and the twenty-first day.But there was decrease tendency as times goes on.Conclusion:Premature vaporization had no significant influence on bonding strength in some alcohol-based dentin bond adhesives within short time.