Department of Operative Dentistry, Division of Oral Functional Science and Rehabilitation, School of Dentistry, Asahi University, 1851, Hozumi, Mizuho City, Gifu 501-0296, Japan.
Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-Ku, Tokyo 113-8549, Japan.
Biomed Res Int. 2021 Jul 29;2021:9731280. doi: 10.1155/2021/9731280. eCollection 2021.
A fluoride-releasing adhesive system is expected to promote mineralization of demineralized dentin/enamel around a composite restoration, thereby contributing to the longevity of the restoration. Scanning electron microscopic (SEM) and transmission electron microscopic (TEM) observations revealed the formation of an "acid-base resistant zone" (ABRZ) beneath the hybrid layer when dentin was treated with a self-etch adhesive system. A thicker ABRZ was formed from the upper slope to the end of the outer lesion, indicating greater resistance against an acid-base challenge, when a fluoride-releasing self-etch adhesive system was used. The slope formation of a fluoride-releasing adhesive is believed to be due to fluoride-release from the adhesive. Quantitative assessment of the acid resistance was performed at the interface using the region of interest (ROI) mode of a digital image analysis software package. The area of the ABRZ is influenced by the concentration of fluoride release from the adhesive resin. The threshold of fluoride concentration in the adhesive may exist to influence the morphology of the ABRZ. X-ray absorption fine structure (XAFS) analysis of the dentin treated with different concentrations of NaF-mouth rinses suggested that different fluoride concentrations result in the formation of different chemical compounds, such as fluorapatite and CaF-like structures, on the dentin surface. This may explain the differences in TBS values and morphological appearance of the ABRZ. NaF is effective in enhancing the enamel/dentin bond durability and also helps create a high quality of ARBZ to improve the clinical success of restorations.
一种释放氟化物的黏接系统有望促进复合树脂修复体周围脱矿牙本质/牙釉质的矿化，从而延长修复体的寿命。扫描电子显微镜（SEM）和透射电子显微镜（TEM）观察显示，在用自酸蚀黏接系统处理牙本质时，在混合层下形成了一个“酸碱抵抗区”（ABRZ）。当使用释放氟化物的自酸蚀黏接系统时，从上层斜坡到外病变的末端形成了更厚的 ABRZ，表明对酸碱挑战的抵抗力更大。释放氟化物黏接剂的斜坡形成被认为是由于黏接剂中氟的释放。使用数字图像分析软件包的感兴趣区域（ROI）模式在界面处对耐酸性进行定量评估。ABRZ 的面积受黏接树脂中氟释放浓度的影响。黏接剂中氟浓度的阈值可能会影响 ABRZ 的形态。用不同浓度的 NaF 漱口液处理牙本质的 X 射线吸收精细结构（XAFS）分析表明，不同的氟浓度会在牙本质表面形成不同的化学化合物，如氟磷灰石和 CaF 类结构。这可以解释 TBS 值和 ABRZ 形态外观的差异。NaF 可有效增强牙釉质/牙本质粘结耐久性，并有助于形成高质量的 ABRZ，从而提高修复体的临床成功率。
