Initial investigation of the corrosion stability of craniofacial implants

Beline, Thamara; Filho, Aljomar José Vechiato; Wee, Alvin G.; Sukotjo, Cortino; Santos, Daniela Micheline dos; Brandão, Thaís Bianca; Barão, Valentim Adelino Ricardo

doi:10.1016/j.prosdent.2017.02.015

Cited by 2 publications

(2 citation statements)

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“…One of the corrosion protocol steps in the current study was EIS, an electrochemical test nonharmful to the sample surface that analyzes the characteristics of the oxide layer . Group HP 0.5 L had the largest capacitance semiloop on the Nyquist plot and the highest impedance on the Bode plot, indicating the least corrosion kinetics among the studied groups, while groups HP 0.5 and HP 1.0 reduced the capacitive semiloop the most and had the lowest impedance, indicating the highest corrosion kinetics.…”

Section: Discussionmentioning

confidence: 99%

“…One of the corrosion protocol steps in the current study was EIS, an electrochemical test nonharmful to the sample surface that analyzes the characteristics of the oxide layer. 32 Group HP 0.5 L had the largest capacitance semiloop on the Nyquist plot and in a pH value of 6. 33 This could be attributed to the acidic environment slowing down the H 2 O 2 decomposition, 34 and therefore, the oxidation of Ti surface.…”

Section: General Corrosionmentioning

confidence: 92%

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Unpredictable Electrochemical Processes in Ti Dental Implants: The Role of Ti Ions and Inflammatory Products

Alhamad,

Ricardo Barao,

Sukotjo

et al. 2023

ACS Appl. Bio Mater.

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Peri-implantitis is a substantially prevailing condition. A potential risk factor for peri-implantitis is Ti implant corrosion. During inflammation, substantial quantities of reactive oxygen species (ROS) secretion and local acidification occur. Little is known about the interaction between the inflammatory and corrosion products on Ti surface corrosion. Therefore, the objective of the current study was to evaluate the synergistic effect of hydrogen peroxide (H2O2), lactic acid, and Ti ions on Ti corrosion. Twenty-seven commercially pure Ti samples were polished (Ra ≈ 45 nm) and divided into 9 groups as a function of electrolyte: (1) artificial saliva (AS) as control (C), (2) AS + Ti ions 20 ppm (Ti), (3) AS + lactic acid (pH = 5.5) (L), (4) AS + lactic acid + Ti ions 20 ppm (TiL), (5) AS + H2O2 0.5 mM (HP0.5), (6) AS + H2O2 1.0 mM (HP1.0), (7) AS + H2O2 0.5 mM + Ti ions 20 ppm (HP0.5Ti), (8) AS + H2O2 0.5 mM + lactic acid (HP0.5L), and (9) AS + H2O2 0.5 mM + Ti ions 20 ppm + lactic acid (HP0.5TiL). Electrochemical tests were performed following ASMT guidelines. Based on Tafel’s method, current density (i corr) and corresponding potential (E corr) were acquired from potentiodynamic curves. Using electrochemical intensity spectroscopy (EIS), Nyquist and Bode plots were derived. Using a modified Randles circuit, charge transfer resistance (R ct) and capacitance (C dl) were estimated. Based on open-circuit potential data, groups C and Ti had the lowest potentials (around −0.3 and −0.4 V vs SCE, respectively), indicating a lower passivation tendency compared to the other groups. From potentiodynamic curves, groups HP0.5 and HP1.0 increased i corr the most. From EIS data, groups HP0.5 and HP1.0 demonstrated the lowest impedance and phase angle on the Bode plot, indicating the highest corrosion kinetics. Based on EIS modeling, the combination of Ti ions, lactic acid, and H2O2 (group HP0.5TiL) significantly decreased R ct (p < 0.05). In conclusion, the concurrent presence of Ti ions, lactic acid, and H2O2 in the vicinity of the Ti surface increased the corrosion kinetics. High corrosion may produce more Ti products in the peri-implant tissues, which may increase the potential risk of peri-implantitis.

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Section: Discussionmentioning

confidence: 99%

“…One of the corrosion protocol steps in the current study was EIS, an electrochemical test nonharmful to the sample surface that analyzes the characteristics of the oxide layer. 32 Group HP 0.5 L had the largest capacitance semiloop on the Nyquist plot and in a pH value of 6. 33 This could be attributed to the acidic environment slowing down the H 2 O 2 decomposition, 34 and therefore, the oxidation of Ti surface.…”

Section: General Corrosionmentioning

confidence: 92%