Corrosion susceptibility of titanium covered by dental cements

Objectives: The aim of this study is to determine the influence of acidic fluorinated cements (as glass ionomer (GI) cements) on the passivation of titanium, using electrochemical investigations. Methods: We realized experimental electrodes that associate titanium and dental cements. Polarization resistance of titanium electrodes has been determined for uncovered metal and electrodes covered with three dental cements. Studentʹs t-tests proved the reproducibility. We also compared successive voltammograms for uncovered titanium and GI covered titanium. Results: Correct passivation was observed with zinc eugenate, but fluorinated GI or zinc phosphate coverage increased the corrosion susceptibility. Significance: However there is no evidence of titanium depassivation when covered with cement. No clinical contraindication can be held.