In vitro Performance of Nano-heterogeneous Dentin Adhesive

作者：Q. Ye, J.G. Park, Elizabeth M. Topp, Yong Wang, Anil Kumar Misra, Paulette Spencer · 发表于：Journal of Dental Research · 年份：2008 · DOI：10.1177/154405910808700911 · 被引用次数：73 · 研究领域：Dental materials and restorations、Endodontics and Root Canal Treatments、Orthodontics and Dentofacial Orthopedics

Water is ubiquitous in the mouths of healthy individuals and routinely interferes with efforts to bond restorations to dental tissues. Our previous studies using tapping-mode atomic force microscopy (TMAFM) have shown that nanophase separation is a general feature of cross-linked polymethacrylates photocured in the presence of water. To explore the relationship between nanophase separation in dentin adhesives and their long-term mechanical properties, we evaluated model adhesives after 3 months of aqueous storage. The degree of contrast in the TMAFM phase image depended on the formulations used, ranging from 'not observable' to 'very strong'. Correspondingly, the mechanical properties of these model adhesives varied from 'minimal change' to 'significant depreciation'. The results support the hypothesis that a high degree of heterogeneity at the nano-scale is associated with poor mechanical durability in these model adhesives.