In vitro performance of nano-heterogeneous dentin adhesive.

Journal of Dental Research
Qiang YeP Spencer

Abstract

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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Citations

Mar 3, 2010·Annals of Biomedical Engineering·Paulette SpencerJ Lawrence Katz
Mar 21, 2012·Journal of Materials Science. Materials in Medicine·Ranganathan ParthasarathyPaulette Spencer
Feb 4, 2012·Microscopy and Microanalysis : the Official Journal of Microscopy Society of America, Microbeam Analysis Society, Microscopical Society of Canada·Manuel ToledanoRaquel Osorio
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Jan 15, 2016·Dental Materials : Official Publication of the Academy of Dental Materials·Xueping GePaulette Spencer
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Sep 12, 2018·Dental Materials : Official Publication of the Academy of Dental Materials·Linyong SongPaulette Spencer
Dec 18, 2018·Dental Materials : Official Publication of the Academy of Dental Materials·Milena CadenaroLorenzo Breschi

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Methods Mentioned

BETA
atomic force microscopy
Atomic
AFM

Software Mentioned

Nanoscope

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