Albashaireh Zakereyya S, Ghazal Muhamad, Kern Matthias
Department of Conservative Dentistry, Faculty of Dentistry, Jordan University of Science & Technology, P.O. Box 3030, Irbid 22110, Jordan.
Am J Dent. 2009 Dec;22(6):376-80.
To assess the retention of glass FRC posts luted with resin cements after conditioning the canal dentin with different acidic treatments.
Post spaces were prepared in six groups of eight endodontically treated extracted teeth. Glass FRC posts were luted after etching the canal dentin with phosphoric acid and/or applying ED-Primer, Clearfil New Bond or XP Bond. The groups with their respective etching time, primer and cement combinations were as follows. ED: ED-Primer only and Panavia 21; ED15: 15 seconds phosphoric acid treatment, ED-Primer and Panavia 21; NB15: 15 seconds phosphoric acid treatment, Clearfil New Bond and Panavia 21; NB30: 30 seconds phosphoric acid treatment, Clearfil New Bond and Panavia 21; XP15: 15 seconds phosphoric acid treatment, XP Bond and Calibra; XP30: 30 seconds phosphoric acid treatment, XP Bond and Calibra. Specimens were stored in water for 30 days and subjected to simulated aging conditions. Post retention was measured in tension at a crosshead speed of 2 mm/minute. Analysis of variance and Bonferroni multiple range tests were conducted for data analysis.
The mean (standard deviation) retention values in Newtons (N) were: ED: 180.9 (44.9); ED15: 278.3 (37.7); NB15: 283.8 (84.9); NB30: 187.7 (60.0), XP15: 216.8 (46.8), XP30: 199.6 (34.0). The retention values of ED15 and NB15 were significantly higher than those of ED and NB30 groups respectively. There were no statistically significant differences between XP Bond groups. Microscopic evaluation of post surfaces demonstrated that the debonding failure was adhesive at the cement-post and cement-dentin interfaces.
评估在使用不同酸性处理剂对根管牙本质进行预处理后，用树脂粘结剂粘结的玻璃纤维增强树脂桩（glass FRC posts）的固位情况。
在六组共八颗经根管治疗的离体牙上制备桩道。在用磷酸蚀刻根管牙本质和/或应用ED-Primer、Clearfil New Bond或XP Bond后，粘结玻璃纤维增强树脂桩。各处理组及其相应的蚀刻时间、底漆和粘结剂组合如下。ED组：仅使用ED-Primer和Panavia 21粘结剂；ED15组：用磷酸处理15秒，使用ED-Primer和Panavia 21粘结剂；NB15组：用磷酸处理15秒，使用Clearfil New Bond和Panavia 21粘结剂；NB30组：用磷酸处理30秒，使用Clearfil New Bond和Panavia 21粘结剂；XP15组：用磷酸处理15秒，使用XP Bond和Calibra粘结剂；XP30组：用磷酸处理30秒，使用XP Bond和Calibra粘结剂。将样本在水中储存30天，并进行模拟老化处理。以2毫米/分钟的十字头速度在拉伸状态下测量桩的固位力。采用方差分析和Bonferroni多重极差检验进行数据分析。
以牛顿（N）为单位的平均（标准差）固位力值如下：ED组：180.9（44.9）；ED15组：278.3（37.7）；NB15组：283.8（84.9）；NB30组：187.7（60.0），XP15组：216.8（46.8），XP30组：199.6（34.0）。ED15组和NB15组的固位力值分别显著高于ED组和NB30组。XP Bond组之间无统计学显著差异。对桩表面的微观评估表明，脱粘失败发生在粘结剂-桩和粘结剂-牙本质界面，为粘结性破坏。
