Corrosion susceptibility of titanium covered by dental cements.
OBJECTIVE
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. Student's 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.


CONCLUSIONS
However there is no evidence of titanium depassivation when covered with cement. No clinical contraindication can be held.
Turpin
Y L
YL
Faculté de chirurgie dentaire, Laboratoire de Biomatériaux en Site Osseux, Université de Rennes 1, 2, Place Pasteur 35000 Rennes, France. nyturpin@club-internet.fr
Tardivel
R D
RD
Tallec
A
A
Le Menn
A C
AC
D020099:Coated Materials, Biocompatible / Q000737:chemistry*; D003343:Corrosion; D003738:Dental Cements / Q000737:chemistry*; D004563:Electrochemistry; D004566:Electrodes; D005459:Fluorides / Q000737:chemistry; D005899:Glass Ionomer Cements / Q000737:chemistry; D008422:Materials Testing; D014025:Titanium / Q000737:chemistry*; D015035:Zinc Oxide-Eugenol Cement / Q000737:chemistry; D015036:Zinc Phosphate Cement / Q000737:chemistry
D020099:Coated Materials, Biocompatible; D003738:Dental Cements; C061504:Flecks; D005899:Glass Ionomer Cements; D015035:Zinc Oxide-Eugenol Cement; C084541:Fuji glass-ionomer lining cement; C009495:titanium dioxide; D015036:Zinc Phosphate Cement; D014025:Titanium; D005459:Fluorides