What is the role of lipopolysaccharide on the tribocorrosive behavior of titanium?

Mathew, Mathew T.; Barão, Valentim Adelino Ricardo; Yuan, Judy Chia Chun; Assunção, Wirley Gonçalves; Sukotjo, Cortino; Wimmer, Markus A.

doi:10.1016/j.jmbbm.2011.11.004

Cited by 88 publications

(84 citation statements)

References 51 publications

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“…Contrarily, Hiromoto and Mischler [43] did not find any effect of albumin on the fretting-corrosion behavior of titanium [43]. Mathew et al [45] reported a negative effect of LPS on the corrosion/wear behavior of titanium in artificial saliva. Additionally, the presence of LPS can induce an accumulation of biofilms.…”

Section: Electrolyte In the Oral Cavity: Human Salivamentioning

confidence: 94%

Wear and Corrosion Interactions on Titanium in Oral Environment: Literature Review

et al. 2015

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The oral cavity is a complex environment where corrosive substances from dietary, human saliva, and oral biofilms may accumulate in retentive areas of dental implant systems and prostheses promoting corrosion at their surfaces. Additionally, during mastication, micromovements may occur between prosthetic joints causing a relative motion between contacting surfaces, leading to wear. Both processes (wear and corrosion) result in a biotribocorrosion system once that occurs in contact with biological tissues and fluids. This review paper is focused on the aspects related to the corrosion and wear behavior of titanium-based structures in the oral environment. Furthermore, the clinical relevance of the oral environment is focused on the harmful effect that acidic substances and biofilms, formed in human saliva, may have on titanium surfaces. In fact, a progressive degradation of titanium by wear and corrosion (tribocorrosion) mechanisms can take place affecting the performance of titanium-based implant and prostheses. Also, the formation of wear debris and metallic ions due to the tribocorrosion phenomena can become toxic for human tissues. This review gathers knowledge from areas like materials sciences, microbiology, and dentistry contributing to a better understanding of bio-tribocorrosion processes in the oral environment.

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Section: Electrolyte In the Oral Cavity: Human Salivamentioning

confidence: 94%

Wear and Corrosion Interactions on Titanium in Oral Environment: Literature Review

et al. 2015

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“…Finally, as a control group, a zero concentration of dextrose was used for comparison among groups. The LPS concentrations (0 μg/mL, 0.15 μg/mL, 15 μg/mL, and 150 μg/mL) were used according to previous studies by Barao et al [23] and Mathew et al [42], to simulate the infection process.…”

Section: Methodsmentioning

confidence: 99%

“…EIS, through the electrochemical process, can be represented by an equivalent electric circuit, and the oxide film properties (capacitance and resistance) were quantified to determine the corrosion process and related corrosion kinetics. The EIS measurements were performed at a frequency range of 100 KHz to 5 mHz, with an AC amplitude curve of 10 mV applied to the electrode at its corrosion potential (E corr ) [23], [25], [42]. These values were used to determine the real (Z′) and imaginary (Z″) components of impedance, which were plotted in the Bode plot or total impedance (|Z|) and phase angle (theta).…”

Section: Methodsmentioning

confidence: 99%

Effects of Dextrose and Lipopolysaccharide on the Corrosion Behavior of a Ti-6Al-4V Alloy with a Smooth Surface or Treated with Double-Acid-Etching

et al. 2014

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Diabetes and infections are associated with a high risk of implant failure. However, the effects of such conditions on the electrochemical stability of titanium materials remain unclear. This study evaluated the corrosion behavior of a Ti-6Al-4V alloy, with a smooth surface or conditioned by double-acid-etching, in simulated body fluid with different concentrations of dextrose and lipopolysaccharide. For the electrochemical assay, the open-circuit-potential, electrochemical impedance spectroscopy, and potentiodynamic test were used. The disc surfaces were characterized by scanning electron microscopy and atomic force microscopy. Their surface roughness and Vickers microhardness were also tested. The quantitative data were analyzed by Pearson's correlation and independent t-tests (α = 0.05). In the corrosion parameters, there was a strong lipopolysaccharide correlation with the Ipass (passivation current density), Cdl (double-layer capacitance), and Rp (polarization resistance) values (p<0.05) for the Ti-6Al-4V alloy with surface treatment by double-acid-etching. The combination of dextrose and lipopolysaccharide was correlated with the Icorr (corrosion current density) and Ipass (p<0.05). The acid-treated groups showed a significant increase in Cdl values and reduced Rp values (p<0.05, t-test). According to the topography, there was an increase in surface roughness (R2 = 0.726, p<0.0001 for the smooth surface; R2 = 0.405, p = 0.036 for the double-acid-etching-treated surface). The microhardness of the smooth Ti-6Al-4V alloy decreased (p<0.05) and that of the treated Ti-6Al-4V alloy increased (p<0.0001). Atomic force microscopy showed changes in the microstructure of the Ti-6Al-4V alloy by increasing the surface thickness mainly in the group associated with dextrose and lipopolysaccharide. The combination of dextrose and lipopolysaccharide affected the corrosion behavior of the Ti-6Al-4V alloy surface treated with double-acid-etching. However, no dose-response corrosion behavior could be observed. These results suggest a greater susceptibility to corrosion of titanium implants in diabetic patients with associated infections.

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“…Nevertheless, the complex oral environment can potentially damage the longevity of dental implants due to the presence of chemical, microbial and physical agents such as saliva, acid, fluoride, bacteria and mastication load [13,17,18]. Such conditions can impair the electrochemical stability of titanium which may be a factor contributing to the failure of the implant-bone interface [19].…”

Section: Introductionmentioning

confidence: 99%

The role of nicotine, cotinine and caffeine on the electrochemical behavior and bacterial colonization to cp-Ti

Barão

Filho

Faverani

et al. 2015

Materials Science and Engineering: C

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What is the role of lipopolysaccharide on the tribocorrosive behavior of titanium?

Cited by 88 publications

References 51 publications

Wear and Corrosion Interactions on Titanium in Oral Environment: Literature Review

Wear and Corrosion Interactions on Titanium in Oral Environment: Literature Review

Effects of Dextrose and Lipopolysaccharide on the Corrosion Behavior of a Ti-6Al-4V Alloy with a Smooth Surface or Treated with Double-Acid-Etching

The role of nicotine, cotinine and caffeine on the electrochemical behavior and bacterial colonization to cp-Ti

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