Effects of pH on the electrochemical behaviour of titanium alloys for implant applications

Souza, Maria Eliziane Pires de; Lima, Lonetá Lauro; Lima, Carmo Roberto Pelliciari de; Zavaglia, Cecília A. C.; Freire, Célia Marina de Alvarenga

doi:10.1007/s10856-008-3623-y

Cited by 68 publications

(53 citation statements)

References 9 publications

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“…The EIS results obtained in this study were fitted with well-known equivalent circuits [18] using the ZSimpWin software (see Fig 3). The R(QR) circuit (Fig 3a) was used to fit the data obtained for the samples immersed in the sterile medium, and the R(Q(R(QR))) circuit (Fig 3b) was used to fit the data obtained for the alloys exposed to S .…”

Section: Resultsmentioning

confidence: 99%

Corrosion of dental alloys in artificial saliva with Streptococcus mutans

Zheng

Zhong

2017

PLoS ONE

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A comparative study of the corrosion resistance of CoCr and NiCr alloys in artificial saliva (AS) containing tryptic soy broth (Solution 1) and Streptococcus mutans (S. mutans) species (Solution 2) was performed by electrochemical methods, including open circuit potential measurements, impedance spectroscopy, and potentiodynamic polarization. The adherence of S. mutans to the NiCr and CoCr alloy surfaces immersed in Solution 2 for 24 h was verified by scanning electron microscopy, while the results of electrochemical impedance spectroscopy confirmed the importance of biofilm formation for the corrosion process. The R(QR) equivalent circuit was successfully used to fit the data obtained for the AS mixture without S. mutans, while the R(Q(R(QR))) circuit was found to be more suitable for describing the biofilm properties after treatment with the AS containing S. mutans species. In addition, a negative shift of the open circuit potential with immersion time was observed for all samples regardless of the solution type. Both alloys exhibited higher charge transfer resistance after treatment with Solution 2, and lower corrosion current densities were detected for all samples in the presence of S. mutans. The obtained results suggest that the biofilm formation observed after 24 h of exposure to S. mutans bacteria might enhance the corrosion resistance of the studied samples by creating physical barriers that prevented oxygen interactions with the metal surfaces.

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Section: Resultsmentioning

confidence: 99%

Corrosion of dental alloys in artificial saliva with Streptococcus mutans

Zheng

Zhong

2017

PLoS ONE

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“…4,7,15,21,22 This research, according to our knowledge, is the first study that used 2 different pH and dextrose levels simultaneously to observe implant corrosion. The corrosion rate of the implants, which were clearly visible in the SEM images, were significantly higher under conditions with lower pH values and higher dextrose concentrations than in Ringer's solution in our study; this finding fully or partially concurs with the results of earlier studies.…”

Section: Discussionmentioning

confidence: 97%

“…The corrosion rate of the implants, which were clearly visible in the SEM images, were significantly higher under conditions with lower pH values and higher dextrose concentrations than in Ringer's solution in our study; this finding fully or partially concurs with the results of earlier studies. 7,15,21,22 Souza et al 7 studied the electrochemical behavior of 2 commercial titanium alloys, Ti-6Al-4V and Ti-13Nb-13Zr, in Ringer's solution at 2 pH values (5.5 and 7.0). The corrosion properties were examined by using potentiodynamic anodic polarization, cyclic polarization, and EIS.…”

Section: Discussionmentioning

confidence: 99%

“…A pH value can vary from 5.4 until 7.8 during inflammatory process. 7 Although implant treatment is very successful in healthy persons, implant failure is more likely to occur in persons with medically compromising systemic conditions, such as diabetes, 8 and other inflammatory diseases associated with lower pH values. 9 The risk to patients with diabetes is particularly disconcerting because of the growing incidence of this disease.…”

Section: Introductionmentioning

confidence: 99%

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Effects of pH and Elevated Glucose Levels on the Electrochemical Behavior of Dental Implants

Tamam

Türkyilmaz

2014

Journal of Oral Implantology

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Implant failure is more likely to occur in persons with medically compromising systemic conditions, such as diabetes related to high blood glucose levels and inflammatory diseases related to pH levels lower than those in healthy people. The aim of this study was to investigate the effects of lower pH level and simulated- hyperglycemia on implant corrosion as these effects are critical to biocompatibility and osseointegration. The electrochemical corrosion properties of titanium implants were studied in four different solutions: Ringer's physiological solution at pH = 7.0 and pH = 5.5 and Ringer's physiological solution containing 15 mM dextrose at pH = 7 and pH = 5.5. Corrosion behaviors of dental implants were determined by cyclic polarization test and electrochemical impedance spectroscopy. Surface alterations were studied using a scanning electron microscope. All test electrolytes led to apparent differences in corrosion behavior of the implants. The implants under conditions of test exhibited statistically significant increases in I(corr) from 0.2372 to 1.007 μAcm(-2), corrosion rates from 1.904 to 8.085 mpy, and a decrease in polarization resistances from 304 to 74 Ω. Implants in dextrose-containing solutions were more prone to corrosion than those in Ringer's solutions alone. Increasing the acidity also yielded greater corrosion rates for the dextrose-containing solutions and the solutions without dextrose.

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“…Ti6Al4V and Ti13Nb13Zr were analyzed in Ringer solution at different pH values by EIS and pontentiodynamic techniques where both alloys presented anodic film with two layers: one compact and the other porous, independent of the pH value 22 . Also EIS diagrams detected a two-layered oxide film comprised of a porous outer layer and a compact inner layer 23 .…”

Section: Abstract: Ti6al4v Thin Films Eis Bioactivity Electrochemimentioning

confidence: 99%

Electrochemical Stability and Bioactivity Evaluation of Ti6Al4V Surface Coated with Thin Oxide by EIS for Biomedical Applications

2015

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Effects of pH on the electrochemical behaviour of titanium alloys for implant applications

Cited by 68 publications

References 9 publications

Corrosion of dental alloys in artificial saliva with Streptococcus mutans

Corrosion of dental alloys in artificial saliva with Streptococcus mutans

Effects of pH and Elevated Glucose Levels on the Electrochemical Behavior of Dental Implants

Electrochemical Stability and Bioactivity Evaluation of Ti6Al4V Surface Coated with Thin Oxide by EIS for Biomedical Applications

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