不同桩核微渗漏情况的体外研究

The in Vitro Study of Coronal Microleakage of Different Post and Core Materials

目的 :比较成品桩钉加复合树脂核、传统银汞桩核和粘结银汞桩核冠向微渗漏情况 ,探讨粘结银汞桩核在后牙修复中的应用前景。方法 :30颗新拔除的磨牙分为 3组 ,分别用成品桩钉加复合树脂核、传统银汞桩核和粘结银汞桩核修复后放入印度墨水中 1周 ,另选择 10颗磨牙作为阴性和阳性对照 ,评价冠方微渗漏情况。结果 :粘结银汞桩核微渗漏明显小于传统银汞桩核 (P <0 .0 1) ;传统银汞桩核与成品桩钉加复合树脂核差异无显著性 (P >0 .0 5 )。结论 :粘结银汞桩核修复可有效降低微渗漏 。

Objective: The aim of this study was to compare the coronal microleakage of composite resin post and cores, conventional and bonded amalgam coronal -radicular restorations on endodotically treated posterior teeth. Methods: Thirty extracted human posterior teeth were root-filled and prepared for composite resin post and cores or coronal-radicular amalgam restorations. The teeth were placed in India ink for 1 week . Elect another 10 teeth as positive control and passive control. The ink penetration was assessed with a coded scoring system. Results: The bonded amalgam groups produced significantly less microleakage than did the nonbonded groups. But no statistically significant differences in leakage were defected between the nonbond groups and the composite resin post and cores. Conclusion: In order to reduce the microleakage , it may be preferable to restore the tooth by using a bonded amalgam coronal-radicular technique.