Bahillo Jose, Roig Miguel, Bortolotto Tissiana, Krejci Ivo
Department of Operative Dentistry and Endodontics, International University of Catalonia, Sant Cugat del Valles, 08195, Barcelona, Spain,
Clin Oral Investig. 2013 Nov;17(8):1893-900. doi: 10.1007/s00784-012-0878-y. Epub 2012 Nov 10.
The purpose of this study is to assess the marginal adaptation of cavities restored with a three-step etch-and-rinse adhesive, OptiBond FL (OFL) under different application protocols.
Twenty-four class V cavities were prepared with half of the margins located in enamel and half in dentin. Cavities were restored with OFL and a microhybrid resin composite (Clearfil AP-X). Three groups (n = 8) that differed in the etching technique were tested with thermomechanical loading, and specimens were subjected to quantitative marginal analysis before and after loading. Micromorphology of etching patters on enamel and dentin were observed with SEM. Data was evaluated with Kruskal-Wallis and Bonferroni post hoc test.
Significantly lower percent CM (46.9 ± 19.5) were found after loading on enamel in group 3 compared to group 1 (96.5 ± 5.1) and group 2 (93.1 ± 8.1). However, no significant differences (p = 0.30) were observed on dentin margins.
Etching enamel with phosphoric acid but avoiding etching dentin before the application of OFL, optimal marginal adaptation could be obtained, evidencing a self-etching primer effect.
A reliable adhesive interface was attained with the application of the three-step etch-and-rinse OFL adhesive with a selective enamel etching, representing an advantage on restoring deep cavities.
本研究旨在评估在不同应用方案下，使用三步酸蚀冲洗粘结剂OptiBond FL（OFL）修复的窝洞边缘适应性。
制备24个V类洞，洞缘一半位于釉质，一半位于牙本质。用OFL和微混合树脂复合材料（Clearfil AP-X）修复窝洞。对三组（n = 8）采用不同酸蚀技术的样本进行热机械加载测试，并在加载前后对样本进行定量边缘分析。用扫描电子显微镜观察釉质和牙本质上酸蚀图案的微观形态。数据采用Kruskal-Wallis检验和Bonferroni事后检验进行评估。
与第1组（96.5±5.1）和第2组（93.1±8.1）相比，第3组在釉质上加载后发现CM百分比显著降低（46.9±19.5）。然而，在牙本质边缘未观察到显著差异（p = 0.30）。
在应用OFL之前，用磷酸酸蚀釉质但避免酸蚀牙本质，可获得最佳边缘适应性，证明了自酸蚀底漆效应。
通过三步酸蚀冲洗OFL粘结剂的应用和选择性釉质酸蚀获得了可靠的粘结界面，这在修复深窝洞方面具有优势。
