@misc{10481/61611,
year = {2019},
url = {http://hdl.handle.net/10481/61611},
abstract = {Background: The aim was to evaluate the effect of silver loaded nanoparticles (NPs) application on the triboscopic,
crystallographic and viscoelastic properties of demineralized dentin. Polymethylmetacrylate-based NPs
and Ag loaded NPs were applied on demineralized dentin.
Material and Methods: Treated and untreated surfaces were probed by a nanoindenter to test viscoelasticity, and
by atomic force microscopy to test nanoroughness and collagen fibril diameter. X-ray diffraction and transmission
electron microscopy through selected area diffraction and bright-field imaging were also used.
Results: Dentin treated with Ag-NPs attained the lowest complex modulus, and the highest tan delta values after
7 days of storage. Dentin treated with undoped-NPs achieved the lowest nanoroughness and the greatest collagen
bandwidths among groups. Crystals were identified as hydroxyapatite with the highest crystallographic maturity
and crystallite size in dentin treated with undoped-NPs. Texture increased in all samples from 24 h to 7 d, except
in dentin surfaces treated with Ag-NPs at 310 plane. Polyhedral, block-like, hexagonal or plate-like shaped apatite
crystals constituted the bulk of minerals in dentin treated with Ag-NPs, after 7 d. Polyhedral or rounded/drop-like,
and polymorphic in strata crystal apatite characterized the minerals when undoped-NPs were used, with more crystalline characteristics after 7 d than that found when Ag-NPs were applied. Ag-NPs application did not improve
the mechanical performance of dentin and did not produce dentin remineralization. However, energy was dissipated
through the dentin without showing stress concentration; contrary was occurring at dentin treated with undoped-
NPs, that provoked bridge-like mineral deposits at the dentin surface.
Conclusions: Ag-NPs application did not enhance the mechanical properties of cervical dentin, though the energy
dissipation did not damage the dentin structure. Remineralization at dentin was not produced after Ag-NPs application,
though improved crystallinity may lead to increase stability of the apatite that was generated at the dentin
surface.},
publisher = {Medicina Oral Sl},
keywords = {Dentin},
keywords = {Mechanical},
keywords = {Mineralization},
keywords = {Roughness},
keywords = {Viscoelastic},
title = {Silver-loaded nanoparticles affect ex-vivo mechanical behavior and mineralization of dentin},
doi = {10.4317/medoral.22885},
author = {Toledano Pérez, Manuel and Sánchez Aguilera, Fátima and Cabello, Inmaculada and Toledano Osorio, Manuel and Osorio Ruiz, María Estrella and López López, Modesto Torcuato and García-Godoy, Franklin and Lynch, Christopher D. and Osorio Ruiz, Raquel},
}