Shafiei Fereshteh, Saadat Maryam
Prevention of Oral and Dental Disease Research Center, Department of Operative Dentistry, School of Dentistry, Shiraz University of Medical Science, Shiraz, Iran.
Department of Operative Dentistry, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.
Microsc Res Tech. 2016 May;79(5):403-7. doi: 10.1002/jemt.22643. Epub 2016 Feb 26.
This study evaluated the effect of dentin surface treatment on the micromorphology and shear bond strength (SBS) of a self-adhering flowable composite, Vertis Flow (VF). Flat dentin surfaces obtained from sixty extracted human molars were divided into six groups (n = 10) according to the following surface treatments: (G1) control, no treatment; (G2) self-etching adhesive, Optibond All-in-One; (G3) phosphoric acid etching for 15 s; (G4) polyacrylic acid for 10 s; (G5) EDTA for 60 s; and G6) sodium hypochlorite (NaOCl) for 15 s. After restoration using VF, SBS was measured in MPa. Data were analyzed using one-way ANOVA and Tamhane test (α = 0.05). Six additional specimens were prepared for scanning electron microscopy analysis. SBS was significantly affected by surface treatment (P < 0.001). SBS of six groups from the highest to the lowest were as follows: (G3) 13.5(A); (G5) 8.98(AB); (G2) 8.85(AB); (G4) 8.21(AB); (G1) 7.53(BC); and (G6) 4.49(C) (groups with the same superscript letter were statistically similar). Morphological analysis revealed numerous long resin tags at the adhesive interface for acid-etched group, with a few short resin tags for the control group and small gap formation for NaOCl-treated group. In conclusion, dentin surface treatments tested differently affected bonding performance of VF; only acid-etching effectively improved this.
本研究评估了牙本质表面处理对自粘结可流动复合树脂Vertis Flow（VF）微观形态及剪切粘结强度（SBS）的影响。从60颗拔除的人磨牙获取的平坦牙本质表面，根据以下表面处理方式分为六组（n = 10）：（G1）对照组，未处理；（G2）自酸蚀粘结剂，Optibond All-in-One；（G3）磷酸酸蚀15秒；（G4）聚丙烯酸酸蚀10秒；（G5）乙二胺四乙酸（EDTA）处理60秒；以及（G6）次氯酸钠（NaOCl）处理15秒。使用VF修复后，以兆帕（MPa）为单位测量SBS。数据采用单因素方差分析和Tamhan检验（α = 0.05）进行分析。另外制备六个样本用于扫描电子显微镜分析。表面处理对SBS有显著影响（P < 0.001）。六组的SBS从高到低依次如下：（G3）13.5（A）；（G5）8.98（AB）；（G2）8.85（AB）；（G4）8.21（AB）；（G1）7.53（BC）；以及（G6）4.49（C）（具有相同上标字母的组在统计学上相似）。形态学分析显示，酸蚀组的粘结界面有大量长树脂突，对照组有少量短树脂突，NaOCl处理组有小间隙形成。总之，所测试的牙本质表面处理对VF的粘结性能有不同影响；只有酸蚀能有效改善此性能。
