期刊
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
卷 60, 期 -, 页码 8-21出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jmbbm.2015.12.030
关键词
Dental implants; Electrochemistry; Corrosion; Wear; Bioactive coatings
资金
- Coordination for the Improvement of Higher Level Personnel (CAPES) from Brazil [PDSE Proc. 11838-13-2]
- State of Sao Paulo Research Foundation (FAPESP) [2013/08451-1]
- National Science Foundation (NSF) [1067424]
- NIH [R03 AR064005]
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.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据