Department of Endodontics and Conservative Dentistry, Gulhane Military Medical Academy, Etlik, Ankara, Turkey.
J Biomed Mater Res B Appl Biomater. 2010 May;93(2):359-66. doi: 10.1002/jbm.b.31590.
The aim of this study was to evaluate the regional push-out bond strengths for two fiber-reinforced post types using three different dentin bonding agents. Sixty single-rooted extracted human first premolar teeth were sectioned below the cemento-enamel junction, and the roots were endodontically treated. Following standardized post space preparations, the roots were divided into two fiber-post groups (Glassix and Carbopost), and further divided into three subgroups of 10 specimens each for the bonding systems self-etching dentin bonding agents (Clearfil SE Bond and Optibond all-in-one), and total-etching dentin bonding agent (XP Bond). A dual-cure resin luting cement (Maxcem) was then placed in the post spaces and posts were then seated into the root canals polymerized through the cervical portion. The roots were then cut into 3-mm thick sections. Push-out tests were performed at a crosshead speed of 0.5 mm/min. The data were analyzed with multivariate ANOVA (alpha = 0.05). The morphology of interface between different dentin bonding agents from the cervical sections were analyzed with SEM. Glass fiber-reinforced posts demonstrated significantly higher push-out bond strengths than carbon fiber-reinforced posts (p < 0.001). Bond strength values decreased significantly from the cervical to the apical root canal regions (p < 0.001). Self-etching dentin adhesive Clearfil SE Bond and total-etching dentin adhesive XP Bond demonstrated similar bond strengths values and this was significantly higher compared with the Optibond all-in-one in cervical root canal region. In conclusion, in all root segments, the glass fiber-reinforced posts provided significantly increased post retention than the carbon fiber-reinforced posts, regardless of the adhesive used.
本研究旨在评估两种纤维增强型桩在使用三种不同牙本质粘结剂时的区域性推出粘结强度。将 60 颗单根人第一前磨牙在牙釉质-牙骨质交界处以下部分截成段，并进行根管治疗。经过标准化的桩腔预备后，将牙根分为两种纤维桩（Glassix 和 Carbopost），然后进一步分为三个亚组，每组 10 个标本，粘结系统为自酸蚀牙本质粘结剂（Clearfil SE Bond 和 Optibond all-in-one）和全酸蚀牙本质粘结剂（XP Bond）。然后将双固化树脂水门汀（Maxcem）置于桩腔中，将桩座置于根管中，通过颈段聚合。将牙根切成 3mm 厚的切片。以 0.5mm/min 的十字头速度进行推出试验。用多变量方差分析（alpha = 0.05）分析数据。用 SEM 分析从颈段不同牙本质粘结剂界面的形态。玻璃纤维增强桩的推出粘结强度明显高于碳纤维增强桩（p < 0.001）。从颈段到根尖根管区域的粘结强度值显著降低（p < 0.001）。自酸蚀牙本质粘结剂 Clearfil SE Bond 和全酸蚀牙本质粘结剂 XP Bond 的粘结强度值相似，且显著高于颈段根管区的 Optibond all-in-one。结论是，在所有牙根段，玻璃纤维增强桩提供的桩固位力明显高于碳纤维增强桩，无论使用何种粘结剂。
