Jordan University of Science and Technology, Irbid 22110, Jordan.
J Prosthet Dent. 2010 Jan;103(1):31-9. doi: 10.1016/S0022-3913(09)60212-2.
Several post surface treatments with or without the application of a bonding agent have been recommended to improve the bond strength of resin cements to posts. A regimen that produces the maximum bond strength of glass fiber-reinforced composite resin posts has not been verified.
The purpose of this study was to evaluate the influence of post surface conditioning methods and artificial aging on the retention and microleakage of adhesively luted glass fiber-reinforced composite resin posts.
Seventy-two endodontically treated single-rooted teeth were prepared for glass fiber-reinforced composite resin posts. The posts were submitted to 3 different surface treatments (n=24), including no treatment, etching with phosphoric acid, and airborne-particle abrasion. Subgroups of the posts (n=8) were then allocated for 3 different experimental conditions: no artificial aging, no bonding agent; no artificial aging, bonding agent; or artificial aging, bonding agent. The posts were luted with resin cement (Calibra). Post retention was measured in tension at a crosshead speed of 2 mm/min. The posts assigned for microleakage investigation were placed in fuchsin dye for 72 hours. The dislodged posts and the post spaces were examined microscopically to evaluate the mode of failure and explore the microleakage. Data were analyzed by 2-way ANOVA followed by Tukey HSD test (alpha=.05).
The mean (SD) retention values for test groups ranged from 269 (63.8) to 349 (52.2) N. The retention values of the airborne-particle-abrasion group were significantly higher than those of the acidic-treatment and no-treatment groups. The application of bonding agent on the post surface produced no significant influence on retention. The mean retention values after artificial aging were significantly higher than without artificial aging. Microscopic evaluation demonstrated that the failure mode was primarily mixed.
Treating the surface of the posts with phosphoric acid for 15 seconds before cementation produced no significant improvement in post retention. Airborne-particle abrasion of the surface of the post significantly improved post retention.
已经推荐了几种表面后处理方法，包括使用或不使用粘结剂，以提高树脂水门汀对桩的粘结强度。尚未验证产生玻璃纤维增强复合树脂桩最大粘结强度的方案。
本研究的目的是评估桩表面处理方法和人工老化对玻璃纤维增强复合树脂桩粘结固位力和微渗漏的影响。
将 72 颗牙髓治疗的单根牙制备用于玻璃纤维增强复合树脂桩。将这些桩进行 3 种不同的表面处理（n=24），包括不处理、磷酸蚀刻和喷丸处理。然后将桩的亚组（n=8）分配到 3 种不同的实验条件下：无人工老化，无粘结剂；无人工老化，粘结剂；或人工老化，粘结剂。用树脂水门汀（Calibra）粘结桩。在 2mm/min 的十字头速度下测量桩的固位力。将用于微渗漏研究的桩放置在品红染料中 72 小时。检查脱位的桩和桩腔，通过显微镜观察评估失效模式并探索微渗漏。数据采用双因素方差分析，然后采用 Tukey HSD 检验（α=.05）。
测试组的平均（SD）固位力值范围为 269（63.8）至 349（52.2）N。喷丸处理组的固位力值明显高于酸处理组和不处理组。在桩表面应用粘结剂对固位力没有显著影响。人工老化后的平均固位力值明显高于未人工老化的。显微镜评估表明，失效模式主要为混合模式。
在粘结前用磷酸处理桩表面 15 秒不能显著提高桩的固位力。喷丸处理桩表面可显著提高桩的固位力。
