Advanced search
Start date
Betweenand
Related content
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Tribocorrosion behavior of biofunctional titanium oxide films produced by micro-arc oxidation: Synergism and mechanisms

Full text
Author(s):
Vieira Marques, Isabella da Silva [1, 2, 3] ; Alfaro, Maria Fernando [2] ; da Cruz, Nilson Cristino [4] ; Mesquita, Marcelo Ferraz [3] ; Takoudis, Christos [2, 5, 6] ; Sukotjo, Cortino [7, 2] ; Mathew, Mathew T. [8, 2] ; Ricardo Barao, Valentim Adelino [3]
Total Authors: 8
Affiliation:
[1] IBTN Br Inst Biomat Tribocorros & Nanomed, Brazilian Branch, Sao Paulo - Brazil
[2] IBTN, Chicago, IL - USA
[3] Univ Campinas UNICAMP, Piracicaba Dent Sch, Dept Prosthodont & Periodontol, Av Limeira 901, BR-13414903 Sao Paulo - Brazil
[4] Univ Estadual Paulista UNESP, Engn Coll, Lab Technol Plasmas, Av Tres Marco 511, BR-18087180 Sao Paulo - Brazil
[5] Univ Illinois, Dept Chem Engn, 851 S Morgan St, SEO 218, Chicago, IL 60607 - USA
[6] Univ Illinois, Dept Bioengn, 851 S Morgan St, SEO 218, Chicago, IL 60607 - USA
[7] Univ Illinois, Dept Restorat Dent, Coll Dent, 801 S Paulina, Chicago, IL 60612 - USA
[8] Rush Univ, Med Ctr, Dept Orthoped Surg, 1611 W Harrison, Chicago, IL 60612 - USA
Total Affiliations: 8
Document type: Journal article
Source: JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS; v. 60, p. 8-21, JUL 2016.
Web of Science Citations: 18
Abstract

Dental implants, inserted into the oral cavity, are subjected to a synergistic interaction of wear and corrosion (tribocorrosion), which may lead to implant failures. The objective of this study was to investigate the tribocorrosion behavior of Ti oxide films produced by micro-arc oxidation (MAO) under oral environment simulation. MAO was conducted under different conditions as electrolyte composition: Ca/P (0.3 M/0.02 M or 0.1 M/0.03 M) incorporated with/without Ag (0.62 g/L) or Si (0.04 M); and treatment duration (5 and 10 min). Non-coated and sandblasted samples were used as controls. The surfaces morphology, topography and chemical composition were assessed to understand surface properties. ANOVA and Tukey's HSD tests were used (a=0.05). Biofunctional porous oxide layers were obtained. Higher Ca/P produced larger porous and harder coatings when compared to non coated group (p < 0.001), due to the presence of ruffle crystalline structure. The total mass loss (K-wc), which includes mass loss due to wear (K-w) and that due to corrosion (K-c) were determined. The dominant wear regime was found for higher Ca/P groups (K-c/K-w approximate to 0.05) and a mechanism of wear-corrosion for controls and lower Ca/P groups (K-c/K-w approximate to 0.11). The group treated for 10 min and enriched with Ag presented the lowest K-wc (p < 0.05). Overall, MAO process was able to produce biofunctional oxide films with improved surface features, working as tribocorrosion resistant surfaces. (C) 2015 Elsevier Ltd. All rights reserved. (AU)

FAPESP's process: 13/08451-1 - Electrochemical stability of cpTi with surfaces modified by acid etching and aluminum oxide sandblasting
Grantee:Valentim Adelino Ricardo Barão
Support Opportunities: Regular Research Grants