Bond Strength Comparison of One-Step/Two-Step Self-Etch Adhesives to Cavity Floor Dentin after 2.5 Years Storage in Water

S. Kawashima, K. Shinkai, Masaya Suzuki, Shiro Suzuki
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Abstract

In recent years, decrease in dentin bond strength of one-step self-etch adhesives after long-term water storage has been reported; however, the flat dentin surface of the extracted tooth has been used to carry out the bond strength tests in the majority of the previous studies. Objectives: The purpose of this study was to compare the micro-tensile-bond-strength (μTBS) of three one-step self-etch adhesives and a two-step self-etch adhesive on the cavity floor dentin after 2.5 years storage in distilled water. Materials and Methods: Adhesives were used in this study: three one-step self-etch adhesives (Primefil, GBOND PLUS and Beauti Bond), and one two-step self-etch adhesive (Clearfil SE Bond), which was used as the control. Bowl-shaped cavities of extracted human incisors were treated with each adhesive and filled with each flowable resin composite from the same manufacturer. The specimens were stored in distilled water at room temperature for two and a half years. The beam samples were made and subjected to μTBS test using the tabletopmaterial- tester. The data were statistically analyzed using one-way ANOVA. Results: The μTBS value of G-BOND PLUS was higher than that of other adhesives; however, the results of ANOVA showed no significant differences in μTBS values among all adhesives. Conclusion: There was no significant difference between one-step and two-step on the bond strength of selfetch adhesives to the cavity dentin floor after a storage period of 2.5 year.
一步/两步自蚀刻胶粘剂在水中保存2.5年后与牙本质的粘接强度比较
近年来有一步自蚀刻胶粘剂在长期蓄水后牙本质粘结强度下降的报道;然而,在以往的研究中,大多数都是利用拔牙后牙本质的平面来进行粘结强度测试。目的:比较三种一步自蚀胶与两步自蚀胶在蒸馏水中保存2.5年后对牙本质的微拉伸粘结强度(μTBS)。材料与方法:本研究使用胶粘剂:3种一步自蚀胶粘剂(Primefil、GBOND PLUS和Beauti Bond)和1种两步自蚀胶粘剂(Clearfil SE Bond)作为对照。提取的人门牙的碗状腔分别用同一厂家的粘合剂和可流动树脂复合材料进行处理。标本在室温蒸馏水中保存两年半。制作梁样,用台式材料测试仪进行μTBS测试。数据采用单因素方差分析进行统计学分析。结果:G-BOND PLUS的μTBS值高于其他胶粘剂;方差分析结果显示,各胶粘剂的μTBS值差异无统计学意义。结论:一步法与二步法自粘剂在保存2.5年后与牙本质底的结合强度无显著性差异。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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