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Site specific properties of carious dentin matrices biomodified with collagen cross-linkers.

American journal of dentistry (2014-02-01)
Ana K Bedran-Russo, Sachin Karol, David H Pashley, Grace Viana
ABSTRACT

To assess in non-cavitated carious teeth the mechanical properties of dentin matrix by measuring its reduced modulus of elasticity and the effect of dentin biomodification strategies on three dentin matrix zones: caries-affected, apparently normal dentin below caries-affected zone and sound dentin far from carious site. Nano-indentations were performed on dentin matrices of carious molars before and after surface modification using known cross-linking agents (glutaraldehyde, proanthocyanidins from grape seed extract and carbodiimide). Statistically significant differences were observed between dentin zones of demineralized dentin prior to surface biomodification (P < 0.05). Following surface modification, there were no statistically significant differences between dentin zones (P < 0.05). An average increase of 30-fold, 2-fold and 2.2-fold of the reduced modulus of elasticity was observed following treatments of the three dentin zones with proanthocyanidin, carbodiimide and glutaraldehyde, respectively.

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