四种纤维增强复合桩系统与两种粘结材料的微推出粘结强度。

Micro push-out bond strengths of four fiber-reinforced composite post systems and 2 luting materials.

作者信息

Kececi Ayse D, Ureyen Kaya B, Adanir Necdet

机构信息

Department of Endodontics, Faculty of Dentistry, Suleyman Demirel University, Isparta, Turkey.

出版信息

Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2008 Jan;105(1):121-8. doi: 10.1016/j.tripleo.2007.07.011. Epub 2007 Oct 17.

DOI:10.1016/j.tripleo.2007.07.011

PMID:17942331

Abstract

OBJECTIVE

The aim of this study was to compare the bond strengths of 2 types of dual-cured luting agents used for cementation of 4 different fiber-reinforced composite (FRC) posts by using a push-out test and to evaluate the failure modes of these systems.

STUDY DESIGN

Eighty human maxillary central incisors were divided into 8 groups (n = 10), decoronated, and roots filled and restored with one of the following post systems: groups 1 to 4: translucent quartz FRC posts; groups 5 and 6: opaque glass FRC post; and groups 7 and 8: individually formed electrical glass fiber post. Cementation was performed with 2 types of dual-polymerizing resin luting agents: Variolink II (groups 1, 3, 5, and 7) and a new self-adhesive resin cement, RelyX Unicem (groups 2, 4, 6, and 8). Slices with a thickness of 1.00 +/- 0.05 mm were prepared from the coronal third of each root by using a low-speed saw. Push-out tests were performed at a crosshead speed of 1 mm/min by using a universal testing machine, and the data was statistically analyzed (analysis of variance [ANOVA] and Duncan tests; P < .05). Fracture modes were evaluated at original magnification x40.

RESULTS

Micro push-out bond strengths were significantly affected by the type of luting agent and the type of post (P < .05, 2-way ANOVA). A significant difference was found among the groups (1-way ANOVA, P < .05). Fiber-reinforced composite posts luted with Variolink II showed higher bond strengths, and the groups ordered as 5, 1, 3, 7, 6, 2, 4, and 8, with the values (MPa, mean +/- SD): 13.80 +/- 5.00, 13.77 +/- 3.78, 12.20 +/- 4.79, 9.39 +/- 2.48, 9.21 +/- 7.76, 7.25 +/- 1.56, 3.89 +/- 4.41, and 3.77 +/- 1.20, respectively. Adhesive failures between dentin and cement were observed more than cohesive failures in cement or post.

CONCLUSIONS

Push-out bond strengths can be affected by luting agent and post type. Variolink II and fiber post combinations resulted in high bond strength values.

摘要

目的

本研究旨在通过推出试验比较用于4种不同纤维增强复合材料（FRC）桩粘结的2种双固化粘结剂的粘结强度，并评估这些系统的失效模式。

研究设计

80颗人上颌中切牙分为8组（n = 10），去冠，根管充填并用以下桩系统之一进行修复：第1至4组：半透明石英FRC桩；第5和6组：不透明玻璃FRC桩；第7和8组：单独成型的电玻璃纤维桩。使用2种双聚合树脂粘结剂进行粘结：Variolink II（第1、3、5和7组）和一种新型自粘结树脂水门汀RelyX Unicem（第2、4、6和8组）。使用低速锯从每个牙根的冠三分之一处制备厚度为1.00±0.05 mm的切片。使用万能试验机以1 mm/min的十字头速度进行推出试验，并对数据进行统计分析（方差分析[ANOVA]和邓肯检验；P <.05）。在原始放大倍数x40下评估断裂模式。

结果

微推出粘结强度受粘结剂类型和桩类型的显著影响（双向方差分析，P <.05）。各组之间存在显著差异（单向方差分析，P <.05）。用Variolink II粘结的纤维增强复合材料桩显示出更高的粘结强度，各组顺序为5、1、3,、7、6、2、4和8，其值（MPa，平均值±标准差）分别为：13.80±5.00、13.77±3.78、12.20±4.79、9.39±2.48、9.21±7.76、7.25±1.56、3.89±4.41和3.77±1.20。观察到牙本质与水门汀之间的粘结失败比水门汀或桩内的内聚破坏更多。