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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Aging Effect of Atmospheric Air on Zirconia Surfaces Treated by Nonthermal Plasma

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Author(s):
dos Santos, Daniela Micheline [1] ; Vechiato-Filho, Aljomar Jose [1] ; Freitas da Silva, Emily Vivianne [1] ; Goiato, Marcelo Coelho [1] ; Cesar, Paulo Francisco [2] ; Rangel, Elidiane Cipriano [3] ; da Cruz, Nilson Cristino [3]
Total Authors: 7
Affiliation:
[1] State Univ Sao Paulo UNESP, Dept Dent Mat & Prosthodont, Aracatuba Dent Sch, Sao Paulo - Brazil
[2] Univ Sao Paulo, Fac Dent, Dept Biomat & Oral Biol, Sao Paulo - Brazil
[3] State Univ Sao Paulo UNESP, Engn Coll, Lab Technol Plasmas LaPTec, Sao Paulo - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Journal of Adhesive Dentistry; v. 17, n. 5, p. 413-419, 2015.
Web of Science Citations: 5
Abstract

Purpose: The purpose of this study was twofold: 1) to characterize the zirconia (Y-TZP) surfaces through scanning electronic microscopy associated with energy-dispersive spectroscopy and atomic force microscopy after the deposition of a thin organosilicon film by nonthermal plasma (NTP) treatment, and 2) to determine the zirconia surface hydrophilicity, before and after aging, through surface energy analysis. Materials and Methods: Surfaces of 16 zirconia disks (10 x 3 mm) were treated for 30 min each with hexamethyldisiloxane and argon plasmas, followed by oxygen plasma. Disks were analyzed before NTP treatment, immediately after NTP treatment, and after aging for 7, 15, and 30 days. The surface energy of the Y-TZP disks was measured with a goniometer. Quantitative data were submitted to statistical analysis using ANOVA and Tukey's test (p < 0.05). Results: Immediately after NTP treatment, the surface energy of the zirconia disks was significantly higher than at any other tested period (p < 0.001), and the water contact angle on the zirconia disks was reduced to 0 degrees. Similar surface energy results were obtained before NTP treatment and after 15 or 30 days of aging (p > 0.05; Tukey's test). Energy-dispersive spectroscopy results revealed the presence of carbon, oxygen, and silicon on the surface after NTP treatment. Conclusion: NTP treatment was useful for treating the zirconia surface for cementation procedures, as it produced a high level of hydrophilicity on the zirconia surface. However, this high level of hydrophilicity did not persist after aging. (AU)

FAPESP's process: 14/11602-4 - Surface characterization and microtensile bond strength of zirconia to resin cements after non-thermal plasma treatment and/or metallic primer
Grantee:Aljomar José Vechiato Filho
Support Opportunities: Scholarships in Brazil - Doctorate