Impedance technique for monitoring of apatite precipitation from simulated body fluid

Fojt, Jaroslav; Joska, Luděk; Hybášek, Vojtěch; Pruchova, Eva; Málek, Jaroslav

doi:10.1016/j.electacta.2018.03.120

Cited by 4 publications

(1 citation statement)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The criterion of the bioactivity resulting from the exposure is the formation of a hydroxyapatite layer on the surface of the biomaterial. For metallic materials, this technique has been extended with online detection of the time to start layer formation using the impedance spectroscopy [63]. This technique showed that inducing precipitation (figure 6) and the Ca-P layer composition on tin alloys is comparable to titanium.…”

Section: Discussionmentioning

confidence: 99%

Mechanical properties, corrosion behaviour and biocompatibility of TiNbTaSn for dentistry

Hybášek

Fojt

Málek

et al. 2020

Mater. Res. Express

Self Cite

View full text Add to dashboard Cite

Titanium and the alloy Ti-6Al-4V are standard in implantology, despite the fact that the alloys may suffer from biomechanical incompatibility. The appropriate solution is the use of titanium β-alloys with a low modulus of elasticity and high strength. An additional advantage of these alloys is improved corrosion behaviour in environments that may contain fluoride ions, i.e. the oral cavity. Ti-25Nb-4Ta-(X)Sn alloys, where X is 4, 6, 8 and 10 weight per cent, were prepared. The phase composition, ultimate tensile strength, yield strength, Young modulus, elongation and hardness were measured. The corrosion behaviour in physiological saline, acidified physiological saline with and without the fluoride ions, was determined using, potentiodynamic polarization and electrochemical impedance spectroscopy. Bioactivity was predicted on the base of exposure in the simulated body fluid extended by impedance detection of the Ca/P layer formation. From the point of view of mechanical properties, alloys with a higher tin content are ideal for load-bearing applications. The corrosion resistance of these alloys in physiological saline is similar to titanium and significantly higher in the fluoride ions containing environment. The bioactivity test -exposure in SBF has shown quite identical results of the studied alloys and titanium, both in terms of kinetics and total composition of precipitated calciumphosphate layer. Possible cytotoxicity effects were excluded by the exposure with murine fibroblasts. This study describes the mechanical properties and corrosion resistance in non-fluoride and fluoride containing media, predicts bioactivity and verifies non-cytotoxicity of new titanium alloys and demonstrates that they are a suitable substitute for currently the most widely used alloys (Ti-6Al-4V, Ti-6Al-7Nb) in terms of both mechanical properties and corrosion resistance for dental implants.

show abstract

Section: Discussionmentioning

confidence: 99%

Mechanical properties, corrosion behaviour and biocompatibility of TiNbTaSn for dentistry

Hybášek

Fojt

Málek

et al. 2020

Mater. Res. Express

Self Cite

View full text Add to dashboard Cite

show abstract

Time evolution of SBF by electric characterization

et al. 2023

View full text Add to dashboard Cite

Electrochemical impedance response of the nanostructured Ti–6Al–4V surface in the presence of S. aureus and E. coli

2023

View full text Add to dashboard Cite

Implant infections associated with biofilm are a significant problem in current healthcare. Early detection of the development of bacterial infection would allow the deployment of antibiotic treatment to suppress complications. Biofilm detection can be based on the changes in the electrochemical response of a metal oxide sensor. The nanostructured surface of titanium alloys provides a large active/geometric surface area ratio and may respond to the presence of bacteria by changing its behaviour. In this work, the changes in impedance response of nanostructured Ti–6Al–4V alloy surface in the presence of E. coli and S. aureus were studied. The nanostructures were prepared by anodic oxidation in a fluoride ions-containing environment. The change in impedance spectra and open circuit potential of the prepared surfaces was monitored for 48 h. Furthermore, a series of measurements in model systems were carried out to help identify the processes leading to the change in the electrochemical behaviour of the surface. The measurements showed significant changes in the surface impedance response over a wide range of frequencies and for both bacterial strains. Based on the results, the implantable sensor based on the nanotubular titanium oxide seems to be a possible and simple way how to detect bacterial infection. Graphical Abstract

show abstract

Impedance technique for monitoring of apatite precipitation from simulated body fluid

Cited by 4 publications

References 45 publications

Mechanical properties, corrosion behaviour and biocompatibility of TiNbTaSn for dentistry

Mechanical properties, corrosion behaviour and biocompatibility of TiNbTaSn for dentistry

Time evolution of SBF by electric characterization

Electrochemical impedance response of the nanostructured Ti–6Al–4V surface in the presence of S. aureus and E. coli

Contact Info

Product

Resources

About