How do titanium and Ti6Al4V corrode in fluoridated medium as found in the oral cavity? An in vitro study

Júlio C M Souza; Sandra L Barbosa; Edith A Ariza; Mariana Henriques; Wim Teughels; Pierre Ponthiaux; Jean-Pierre Celis; Luis A Rocha

doi:10.1016/j.msec.2014.11.055

How do titanium and Ti6Al4V corrode in fluoridated medium as found in the oral cavity? An in vitro study

Mater Sci Eng C Mater Biol Appl. 2015 Feb:47:384-93. doi: 10.1016/j.msec.2014.11.055. Epub 2014 Nov 20.

Authors

Júlio C M Souza¹, Sandra L Barbosa², Edith A Ariza², Mariana Henriques³, Wim Teughels⁴, Pierre Ponthiaux⁵, Jean-Pierre Celis⁶, Luis A Rocha⁷

Affiliations

¹ CT2M - Centre for Mechanical and Materials Technologies, Dept. of Mechanical Engineering (DEM), Universidade do Minho, Campus Azurém, 4800-058 Guimarães, Portugal; Dept. Metallurgy and Materials Engineering (MTM), Katholieke Universiteit Leuven, B-3001 Leuven, Belgium. Electronic address: jsouza@dem.uminho.pt.
² CT2M - Centre for Mechanical and Materials Technologies, Dept. of Mechanical Engineering (DEM), Universidade do Minho, Campus Azurém, 4800-058 Guimarães, Portugal.
³ IBB - Institute for Biotechnology and Bioengineering, Universidade do Minho, P-4710-057 Braga, Portugal.
⁴ Dept. of Oral Health Sciences, KU Leuven, Leuven B-3000, Belgium.
⁵ Chemical Engineering Laboratory (LGPM), Ecole Centrale Paris, F-92290 Châtenay-Malabry, France.
⁶ Dept. Metallurgy and Materials Engineering (MTM), Katholieke Universiteit Leuven, B-3001 Leuven, Belgium.
⁷ CT2M - Centre for Mechanical and Materials Technologies, Dept. of Mechanical Engineering (DEM), Universidade do Minho, Campus Azurém, 4800-058 Guimarães, Portugal; Dept. of Physics, UNESP - Universidade Estadual Paulista, Faculdade de Ciências, 17033-360 Bauru, SP, Brazil.

PMID: 25492211
DOI: 10.1016/j.msec.2014.11.055

Abstract

The purpose of this work was to evaluate the corrosion of commercially pure (CP) titanium and Ti6Al4V in vitro at different F(-) concentrations regularly found in the oral cavity by using different electrochemical tests and surface analysis techniques. electrochemical impedance spectroscopy (EIS), open circuit potential (OCP) and potentiodynamic polarization tests were associated to advanced characterization techniques such as SEM, EDS, AFM, ICP-MS and XPS. OCP tests revealed a higher reactivity of both CP titanium and Ti6Al4V at 12,300 ppm F(-) concentration than that recorded at 227 ppm F(-). Also, a significant decrease of the corrosion resistance of both materials was noticed by EIS in fluoride solutions. Material loss caused by corrosion was noticed on titanium surfaces by SEM and AFM in the presence of high F(-) concentration. CP titanium degraded by pitting corrosion while Ti6Al4V suffered from general corrosion showing micro-cracks on surface. Furthermore, a high release of metallic ions from the test samples after immersion at high F(-) concentrations was detected by ICP-MS, that can be potentially toxic to oral tissues.

Keywords: Electrochemical tests; Fluoride; Surface analysis; Ti6Al4V; Titanium.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Alloys
Corrosion
Electrochemistry / methods
Fluorides / chemistry*
In Vitro Techniques
Materials Testing / methods
Mouth / chemistry*
Saliva, Artificial / chemistry
Spectrum Analysis / methods
Surface Properties
Titanium / chemistry*

Substances

Alloys
Saliva, Artificial
titanium alloy (TiAl6V4)
Titanium
Fluorides