@Article{CamposRaMaBoSoMe:2016:NeSiYT,
author = "Campos, T. M. B. and Ramos, N. C. and Machado, Jo{\~a}o Paulo
Barros and Bottino, M. A. and Souza, R. O. A. and Melo, R. M.",
affiliation = "{Instituto Tecnol{\'o}gico de Aeron{\'a}utica (ITA)} and
{Universidade Estadual Paulista (UNESP)} and {Instituto Nacional
de Pesquisas Espaciais (INPE)} and {Universidade Estadual Paulista
(UNESP)} and {Universidade Federal do Rio Grande do Norte (UFRN)}
and {Universidade Estadual Paulista (UNESP)}",
title = "A new silica-infiltrated Y-TZP obtained by the sol-gel method",
journal = "Journal of Dentistry",
year = "2016",
volume = "48",
pages = "55--61",
month = "May",
keywords = "Bond strength, Flexural strength, Silica, Sol-gel, Weibull,
Zirconia.",
abstract = "Objective The aim of this study was to evaluate silica
infiltration into dental zirconia (VITA In-Ceram 2000 YZ, Vita
Zahnfabrik) and its effects on zirconia's surface characteristics,
structural homogeneity and bonding to a resin cement. Methods
Infiltration was performed by immersion of the pre-sintered
zirconia specimens in silica sols for five days (ZIn). Negative
(pure zirconia specimens, ZCon-) and positive controls (specimens
kept in water for 5 days, ZCon+) were also performed. After
sintering, the groups were evaluated by X-ray diffraction (XRD),
grazing angle X-ray diffraction (DRXR), scanning electron
microscopy (SEM), contact angle measurements, optical
profilometry, biaxial flexural test and shear bonding test.
Weibull analysis was used to determine the Weibull modulus (m) and
characteristic strength (\σ0) of all groups. Results There
were no major changes in strength for the infiltrated group, and
homogeneity (m) was also increased. A layer of ZrSiO4 was formed
on the surface. The bond strength to resin cement was improved
after zirconia infiltration, acid conditioning and the use of an
MDP primer. Conclusion The sol-gel method is an efficient and
simple method to increase the homogeneity of zirconia.
Infiltration also improved bonding to resin cement. Clinical
significance The performance of a zirconia infiltrated by silica
gel improved in at least two ways: structural homogeneity and
bonding to resin cement. The infiltration is simple to perform and
can be easily managed in a prosthesis laboratory.",
doi = "10.1016/j.jdent.2016.03.004",
url = "http://dx.doi.org/10.1016/j.jdent.2016.03.004",
issn = "0300-5712 and 1879-176X",
language = "en",
targetfile = "campos_anew.pdf",
urlaccessdate = "27 abr. 2024"
}