使用不同聚合模式的双聚合粘结系统与牙本质的微拉伸粘结强度。

Microtensile bond strength of dual-polymerizing cementing systems to dentin using different polymerizing modes.

作者信息

Arrais Cesar A G, Giannini Marcelo, Rueggeberg Frederick A, Pashley David H

机构信息

Department of Restorative Dentistry, Piracicaba School of Dentistry, University of Campinas, Piracicaba, Brazil.

出版信息

J Prosthet Dent. 2007 Feb;97(2):99-106. doi: 10.1016/j.prosdent.2006.12.007.

DOI:10.1016/j.prosdent.2006.12.007

PMID:17341378

Abstract

STATEMENT OF THE PROBLEM

The effectiveness of bond strength using dual-polymerizing cementing systems ([DCSs] defined as the combination of dual-polymerizing bonding agents and resin cements) used with indirect restorations has not been evaluated when used solely with the autopolymerizing mode.

PURPOSE

This study evaluated the in vitro microtensile bond strength (MTBS) of fourth- and fifth-generation DCSs with indirect composite restorations either light polymerized or autopolymerized.

MATERIAL AND METHODS

Occlusal dentin surfaces of 48 human third molars were exposed and flattened. Teeth were assigned to 8 groups (n=6) according to the DCS and polymerizing modes: All-Bond2/Duolink (AB2), Optibond/Nexus2 (OPT), Bond1/Lute-it (B1), and Optibond Solo Dual Cure/Nexus2 (SOLO). Bonding agents were applied to dentin surfaces and left in the unpolymerized state. Resin cements were applied to prepolymerized resin discs (2 mm thick/Z250), which were subsequently bonded to the dentin surfaces. The restored teeth were light polymerized according to manufacturers' instructions (PP/XL 3000) or allowed to autopolymerize (AP). Restored teeth were stored in water at 37 degrees C for 24 hours and were both mesio-distally and bucco-lingually sectioned to obtain multiple bonded beams (1.2 mm2 of cross-sectional area). Each specimen was tested in tension at a crosshead speed of 0.6 mm/min until failure. Data (MPa) were analyzed by 2-way analysis of variance and the Tukey post hoc test (alpha=.05). Failure patterns of tested specimens were analyzed using scanning electron microscopy.

RESULTS

The mean (SD) MTBS values (MPa) were: AB2/PP: 36.9 (6.5); AB2/AP: 32.7 (7.3); B1/PP: 38.2 (7.0); B1/AP: 13.0 (4.2); SOLO/PP: 33.2 (7.2); SOLO/AP: 23.4 (3.4); OPT/PP: 30.8 (7.5); OPT/AP: 13.1 (5.8). The AP groups showed significantly lower MTBS than the PP groups (P<.0001), except for AB2, which showed no difference between polymerization modes (P=.2608).

CONCLUSION

The autopolymerizing mode of some dual-polymerizing cement systems may not be effective in promoting bond strength.

摘要

问题陈述

当仅使用自聚模式时，用于间接修复体的双聚合粘接系统（[DCSs]定义为双聚合粘接剂和树脂水门汀的组合）的粘接强度有效性尚未得到评估。

目的

本研究评估了第四代和第五代DCSs与间接复合树脂修复体在光固化或自固化情况下的体外微拉伸粘接强度（MTBS）。

材料与方法

暴露并平整48颗人第三磨牙的咬合面牙本质表面。根据DCS和聚合模式将牙齿分为8组（n = 6）：全酸蚀/多聚体（AB2）、奥齿泰/奈素2（OPT）、碧兰1/路特依（B1）和奥齿泰单组分双固化/奈素2（SOLO）。将粘接剂应用于牙本质表面并保持未聚合状态。将树脂水门汀应用于预聚合的树脂圆盘（2mm厚/Z250），随后将其粘接至牙本质表面。根据制造商的说明（PP/XL 3000）对修复后的牙齿进行光固化或使其自固化（AP）。将修复后的牙齿在37℃水中储存24小时，然后沿近远中向和颊舌向切片以获得多个粘接梁（横截面积1.2mm²）。每个标本以0.6mm/min的十字头速度进行拉伸测试直至破坏。数据（MPa）通过双向方差分析和Tukey事后检验进行分析（α = 0.05）。使用扫描电子显微镜分析测试标本的破坏模式。

结果

平均（SD）MTBS值（MPa）为：AB2/PP：36.9（6.5）；AB2/AP：32.7（7.3）；B1/PP：38.2（7.0）；B1/AP：13.0（4.2）；SOLO/PP：33.2（7.2）；SOLO/AP：23.4（3.4）；OPT/PP：30.8（7.5）；OPT/AP：13.1（5.8）。除AB2在聚合模式之间无差异（P = 0.2608）外，AP组的MTBS显著低于PP组（P < 0.0001）。