Objective

The purpose of this study was to determine the influence of different smear layers on enamel and dentin bond durability of various types of self-etch adhesives.

Methods

Two universal adhesives, Scotchbond Universal (SU) and Prime & Bond elect (PE); a conventional single-step self-etch adhesive, G-ænial Bond (GB); and two two-step self-etch adhesives, Optibond XTR (OX) and Clearfil SE Bond (SE) were used in this study. Shear bond strengths (SBS) and shear fatigue strengths (SFS) to human enamel and dentin were determined with different smear layer conditions. The prepared specimens were divided into three groups. The bonding surfaces were prepared by grinding with either (1) #180, (2) #600, or (3) #4000-SiC papers before making the bonded assemblies. For each group, 15 specimens were prepared for the SBS and 30 specimens for the SFS.

Results

The two-step self-etch adhesives showed significantly higher SFS values than the single-step self-etch adhesives, regardless of the smear layer condition or substrate. Although most of the tested adhesives showed no significant differences in enamel SFS values among the smear layer groups, SU, GB, and SE showed significantly lower SFS values in the #180 in dentin groups than the #600 and #4000 groups.

Conclusion

The influence of different smear layer conditions on bond durability was adhesive dependent. Furthermore, the smear layers generated on different substrates also influenced the bond quality of the self-etch adhesives.

Significance

Smear layer conditions of enamel and dentin influence the bond durability of universal adhesives and conventional single and two-step self-etch adhesives.

中文翻译：

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不同涂片层对自蚀胶黏结耐久性的影响

客观的

这项研究的目的是确定不同涂抹层对各种类型的自蚀刻胶粘剂的牙釉质和牙本质粘合耐久性的影响。

方法

两种通用胶粘剂，Scotchbond Universal（SU）和Prime＆Bondlect（PE）；常规的单步自蚀刻胶粘剂，G-ænialBond（GB）；这项研究使用了两种两步自蚀刻粘合剂，即Optibond XTR（OX）和Clearfil SE Bond（SE）。在不同的涂片层条件下测定了对人牙釉质和牙本质的剪切粘结强度（SBS）和剪切疲劳强度（SFS）。准备好的标本分为三组。通过在制造粘合组件之前用（1）＃180，（2）＃600或（3）＃4000-SiC纸研磨来制备粘合表面。对于每组，为SBS准备了15个样本，为SFS准备了30个样本。

结果

无论涂抹层条件或基材如何，两步自蚀刻胶粘剂均显示出比单步自蚀刻胶粘剂显着更高的SFS值。尽管大多数测试粘合剂在涂片层组之间的牙釉质SFS值均无显着差异，但SU，GB和SE在＃180牙本质组中的SFS值显着低于＃600和＃4000组。

结论

不同涂抹层条件对粘合耐久性的影响取决于粘合剂。此外，在不同基板上产生的涂污层也影响了自蚀刻粘合剂的粘合质量。

意义

牙釉质和牙本质的涂污层状况会影响通用粘合剂以及传统的单步和两步自蚀刻粘合剂的粘合耐久性。