Electrochemical stability and corrosion resistance of Ti–Mo alloys for biomedical applications

Oliveira, Nilson T. C.; Guastaldi, Antônio Carlos

doi:10.1016/j.actbio.2008.07.010

Cited by 250 publications

(159 citation statements)

References 28 publications

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“…The concern of reducing implant corrosion might be addressed and is being addressed by different methods such as: new formulations of metallic alloys that improve the mechanical and corrosion properties of the implant (Yamazoe et al, 2007;Mareci et al, 2009;Oliveira and Guastaldi, 2009); surface modifications that stabilize the reactivity of the surface (Papakyriacou et al, 2000); or electrical protection (i.e., stimulation) of implants. However, a fundamental understanding of the consequences of abnormal electrical signals on the growth and development of cells and tissues is required for the design of appropriate solutions and adequate treatment for affected individuals.…”

Section: Clinical Relevance Of Corrosionmentioning

confidence: 99%

Electrical Implications of Corrosion for Osseointegration of Titanium Implants

et al. 2011

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The success rate of titanium implants for dental and orthopedic applications depends on the ability of surrounding bone tissue to integrate with the surface of the device, and it remains far from ideal in patients with bone compromised by physiological factors. The electrical properties and electrical stimulation of bone have been shown to control its growth and healing and can enhance osseointegration. Bone cells are also sensitive to the chemical products generated during corrosion events, but less is known about how the electrical signals associated with corrosion might affect osseointegration. The metallic nature of the materials used for implant applications and the corrosive environments found in the human body, in combination with the continuous and cyclic loads to which these implants are exposed, may lead to corrosion and its corresponding electrochemical products. The abnormal electrical currents produced during corrosion can convert any metallic implant into an electrode, and the negative impact on the surrounding tissue due to these extreme signals could be an additional cause of poor performance and rejection of implants. Here, we review basic aspects of the electrical properties and electrical stimulation of bone, as well as fundamental concepts of aqueous corrosion and its electrical and clinical implications.

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Section: Clinical Relevance Of Corrosionmentioning

confidence: 99%

Electrical Implications of Corrosion for Osseointegration of Titanium Implants

et al. 2011

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“…In naturally aerated physiological serum, corrosion rate is mainly controlled by dissolution process of a complex passive film. Oliveira et al 9 studied the electrochemical behavior of commercially pure titanium (cp-Ti) and the Ti-Mo system's alloys (6-20% in weight) with regard to immersion time in the electrolyte that simulates a physiological medium. The values of potential indicated that Ti-Mo alloys and cp-Ti present a titanium oxide layer that forms spontaneously.…”

Section: Introductionmentioning

confidence: 99%

Interstitial oxygen's influence on the corrosion behavior of Ti-9Mo alloys

et al. 2013

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Titanium and its alloys have been used in biomedical applications because of their satisfactory mechanical properties, biocompatibility and corrosion resistance. Their high corrosion resistance has been attributed to the formation of a thermodynamically stable titanium oxide layer on the surface of these materials. In the present work, the corrosion behavior of Ti-9Mo (wt %) alloy, doped with oxygen, was evaluated in a phosphate buffered saline (PBS) solution. The results showed a small decrease in the corrosion potential and a reduction in the corrosion rate with the oxygen doping, indicating a higher corrosion resistance is desirable for biomedical applications.

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“…This result was confirmed by the oxide reconstruction rate submitted to the open circuit analyses for 30 days. This dissolution process can be originated both from the oxide thickness decrease as the matrix rearrangement occurs during the electrolyte exposure 21,31 .…”

Section: Resultsmentioning

confidence: 99%