期刊
JOURNAL OF DENTAL RESEARCH
卷 87, 期 9, 页码 829-833出版社
INT AMER ASSOC DENTAL RESEARCHI A D R/A A D R
DOI: 10.1177/154405910808700911
关键词
dentin adhesive; durability; degree of nano-heterogeneity; phase contrast; aqueous storage
资金
- NATIONAL INSTITUTE OF DENTAL &CRANIOFACIAL RESEARCH [R01DE014392] Funding Source: NIH RePORTER
- NIDCR NIH HHS [R01 DE14392, R01 DE014392-01A2, R01 DE014392] Funding Source: Medline
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.
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