2种自酸蚀粘接剂开封启用后的时间对粘接界面微渗漏的影响

The effect of adhesive with different unsealing time on the microleakage of adhesive interface

目的:研究2种自酸蚀粘接剂开封启用后的时间对牙体与充填体间粘接界面微渗漏的影响。方法:将80个离体磨牙从面制备制备4 mm×4 mm×4 mm洞窝,分2组(n=40),选用2种新的未开封的自酸蚀粘接剂Scotchbond Universal(S组)和Xeno V+(X组),分别在开启即刻及启用后1、2、3个月时用于离体牙光固化复合树脂Z350粘接修复(n=10),通过亚甲基蓝染色法观察牙体与充填体间粘接界面的微渗漏。结果:①S组样本的微渗漏评分随着粘接剂开封启用后时间的延长有增大的趋势,启用后3个月与开启即刻相比具有统计学差异(P <0. 05);②X组样本的微渗漏评分随着粘接剂启用后时间的延长有增大的趋势,但是各时间点间无统计学差异(P>0. 05);③在粘接剂开启即刻及启用后1个月2个测试时间点,X组样本的微渗漏评分明显大于S组(P <0. 05)。结论:自酸蚀粘接剂开启后时间延长可增加牙体与充填体粘接界面的微渗漏,且影响程度与粘接剂的种类有关。

Objective: To investigate the effect of self-etching adhesive with different unsealing time on the microleakage of the adhesive interface between tooth and resin. Methods: Unopened self-etching adhesives,Scotchbond Universal( S) and Xeno V+( X) were respectively used to adhere Z350 resin for restoration of the prepared occlusal cavities sized 4 mm × 4 mm × 4 mm( n = 40). The methylene blue staining method was used to observe the microleakage of the adhesive interface between the tooth and filling material at the instant moment,1,2 and 3 months after the self-etching adhesives was opened( n = 10). Results:(1)Increase of microleakage in S group was found with the time span after unsealing,and there was a statistical difference between the instant moment and 3 months after unsealing( P < 0. 05).(2)There was no significant difference at the 4 test time points in X group( P > 0. 05),although the microleakage value of the samples were increased with the increase of the time after unsealing.(3)The microleakage of X group was greater than that of S group at the instant moment and 1 month after unsealing( P < 0. 05). Conclusion: Unsealing time may increase the microleakage of the adhesive interface between the tooth and the filling material,the effect varies with the types of the adhesives.