不同表面处理方案对自粘接树脂水门汀与牙本质间微拉伸粘结强度的影响。

Influence of different surface conditioning protocols on microtensile bond strength of self-adhesive resin cements to dentin.

机构信息

Department of Stomatology, School of Dentistry, University of Granada, Granada, Spain.

出版信息

J Prosthet Dent. 2011 Apr;105(4):227-35. doi: 10.1016/S0022-3913(11)60037-1.

DOI:10.1016/S0022-3913(11)60037-1

PMID:21458647

Abstract

STATEMENT OF PROBLEM

According to manufacturers, bonding with self-adhesive resin cements can be achieved without any pretreatment steps such as etching, priming, or bonding. However, the benefit of saving time with these simplified luting systems may be realized at the expense of compromising the bonding capacity.

PURPOSE

The purpose of this study was to assess whether different dentin conditioning protocols influence the bond performance of self-adhesive resin cements to dentin.

MATERIAL AND METHODS

Flat dentin surfaces from 48 human molars were divided into 4 groups (n=12): 1) control, no conditioning; 2) H(3)PO(4), etching with 37% H(3)PO(4) for 15 seconds; 3) SEBond, bonding with self-etching primer adhesive (Clearfil SE Bond); and 4) EDTA, etching with 0.1M EDTA for 60 seconds. The specimens from each dentin pre-treatment were bonded using the self-adhesive cements RelyX Unicem, Maxcem or Multilink Sprint (n=4). The resin-cement-dentin specimens were stored in water at 37°C for 7 days, and serially sectioned to produce beam specimens of 1.0 mm(2) cross-sectional area. Microtensile bond strength (μTBS) testing was performed at 1.0 mm/min. Data (MPa) were analyzed by 2-way ANOVA and Tukey multiple comparisons test (α=.05). Fractured specimens were examined with a stereomicroscope (x40) and classified as adhesive, mixed, or cohesive. Additional bonded interfaces were evaluated under a scanning electron microscope (SEM).

RESULTS

Cement-dentin μTBS was affected by the dentin conditioning approach (P<.001). RelyX Unicem attained statistically similar bond strengths to all pre-treated dentin surfaces. H(3)PO(4)-etching prior to the application of Maxcem resulted in bond strength values that were significantly higher than the other groups. The lowest μTBS were attained when luting Multilink Sprint per manufacturers' recommendations, while H(3)PO(4)-etching produced the highest values followed by Clearfil SE bonding and EDTA. SEM observations disclosed an enhanced potential of the self-adhesive cements to form a hybrid layer when applied following manufacturer's instructions.

CONCLUSIONS

When evaluated self-adhesive resin cements are used, selectively etching dentin with H(3)PO(4) prior to luting results in the most effective bonding.

摘要

问题陈述

根据制造商的说法，自粘结树脂水门汀可以在不进行任何预处理步骤（如蚀刻、底漆或粘结）的情况下粘结。然而，通过这些简化的粘固系统节省时间的好处可能是以牺牲粘结能力为代价的。

目的

本研究的目的是评估不同的牙本质处理方案是否会影响自粘结树脂水门汀与牙本质的粘结性能。

材料和方法

从 48 个人类磨牙的平面牙本质表面中分为 4 组（n=12）：1）对照组，不处理；2）H（3）PO（4），用 37% H（3）PO（4）蚀刻 15 秒；3）SEBond，用自酸蚀底漆粘结剂（Clearfil SE Bond）粘结；4）EDTA，用 0.1M EDTA 蚀刻 60 秒。从每个牙本质预处理标本中使用自粘结水泥 RelyX Unicem、Maxcem 或 Multilink Sprint（n=4）进行粘结。将树脂-水泥-牙本质标本在 37°C 水中储存 7 天，然后连续切片，制成 1.0mm（2）横截面面积的梁标本。以 1.0mm/min 的速度进行微拉伸粘结强度（μTBS）测试。数据（MPa）采用双因素方差分析和 Tukey 多重比较检验（α=.05）进行分析。用立体显微镜（x40）检查断裂标本，并分类为粘结、混合或内聚。在扫描电子显微镜（SEM）下评估额外的粘结界面。

结果

牙本质处理方法影响水泥-牙本质的μTBS（P<.001）。RelyX Unicem 与所有预处理牙本质表面的粘结强度均达到统计学相似。在应用 Maxcem 之前用 H（3）PO（4）蚀刻，其粘结强度值显著高于其他组。当按照制造商的建议使用 Multilink Sprint 进行粘固时，获得的最低 μTBS，而 H（3）PO（4）蚀刻产生的最高值，其次是 Clearfil SE 粘结和 EDTA。SEM 观察显示，当按照制造商的说明使用时，自粘结水泥具有形成混合层的潜在能力增强。