Volume 106, Issue 3 pp. 997-1009
Original Research Report

Corrosion behavior of surface modifications on titanium dental implant. In situ bacteria monitoring by electrochemical techniques

Ivan Díaz

Ivan Díaz

National Centre for Metallurgical Research, CENIM (CSIC), Madrid, 28040 Spain

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Miguel Ángel Pacha-Olivenza

Miguel Ángel Pacha-Olivenza

Networking Research Center on Bioengineering, Biomaterial and Biomedicine (CIBER-BBN), Spain

Department of Applied Physics, Faculty of Science-UEx, Badajoz, Spain

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Ricardo Tejero

Ricardo Tejero

Biotechnology Institute (BTI), Vitoria, Spain

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Eduardo Anitua

Eduardo Anitua

Biotechnology Institute (BTI), Vitoria, Spain

Private Practice in Implantology and Oral Rehabilitation in Vitoria, Spain

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Maria Luisa González-Martín

Maria Luisa González-Martín

Networking Research Center on Bioengineering, Biomaterial and Biomedicine (CIBER-BBN), Spain

Department of Applied Physics, Faculty of Science-UEx, Badajoz, Spain

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Maria Lorenza Escudero

Maria Lorenza Escudero

National Centre for Metallurgical Research, CENIM (CSIC), Madrid, 28040 Spain

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Maria Cristina García-Alonso

Corresponding Author

Maria Cristina García-Alonso

National Centre for Metallurgical Research, CENIM (CSIC), Madrid, 28040 Spain

Correspondence to: M. C. García-Alonso (e-mail: [email protected])Search for more papers by this author
First published: 08 May 2017
Citations: 16

Abstract

The effects of surface modifications and bacteria on the corrosion behavior of titanium have been studied. Five surface modifications were analyzed: two acid etchings (op V, op N), acid etching + anodic oxidation (op NT), sandblasting + acid etching (SLA), and machined surfaces (mach). The corrosion behavior of the surface modifications was evaluated by following the standard ANSI/AAMI/ISO 10993-15:2000. Cyclic potentiodynamic and potentiostatic anodic polarization tests and ion release by ICP-OES after immersion for 7 days in 0.9% NaCl were carried out. Microbiologically induced corrosion (MIC) of low and high roughness (mach, op V) was assessed in situ by electrochemical techniques. Streptococcus mutans bacteria were resuspended in PBS at a concentration of 3 × 108 bacteria mL−1 and maintained at 37°C. MIC was measured through the open circuit potential, Eoc, and electrochemical impedance spectroscopy from 2 to 28 days. Potentiodynamic curves showed the typical passive behavior for all the surface modifications. The titanium ion release after immersion was below 3 ppb. In situ bacteria monitoring showed the decrease in Eoc from −0.065 (SD 0.067) Vvs. Ag/AgCl in mach and −0.115 (SD 0.084) Vvs. Ag/AgCl in op V, to −0.333 (SD 0.147) Vvs. Ag/AgCl in mach and −0.263 (SD 0.005) Vvs. Ag/AgCl in op V, after 2 and 28 days, respectively. A reduction of the oxide film resistance, especially in op V (54 MΩ cm2 and 6 MΩ cm2, after 2 and 28 days, respectively) could be seen. Streptococcus mutans negatively affected the corrosion resistance of titanium. © 2017 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 106B: 997–1009, 2018.

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