[Amalgam. XV. Electrochemical activity in the mouth].
Almost all metals used in dentistry can corrod. The uniform corrosion is not so important in concern to the used metals. This type of corrosion may become important in an extreme environment with the low pH which can exist in plaque, denture adhesive and fluoride gel. An important type of corrosion is contact corrosion, which results in a higher corrosion rate of the base metal in the galvanic couple noble-base metal. As a result of the small io (exchange current dentistry) the higher corrosion rate is the result of a larger reaction surface for the reduction reaction. Another important type of corrosion is caused by differences in the surface. As a result of this differentiation pitting or crevice corrosion may occur. Also bacteria and other micro-organisms can have an influence on the corrosion process. The corrosion rate is not only determined by the redoxpotential but also by other factors.
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Vakgroep Tandheelkundige Materiaalwetenschappen, Academisch Centrum Tandheelkunde Amsterdam (ACTA), Louwesweg 1, 1066 EA Amsterdam.
D003343:Corrosion; D003722:Dental Alloys / Q000737:chemistry; D003723:Dental Amalgam / Q000009:adverse effects* / Q000737:chemistry*; D004563:Electrochemistry; D006801:Humans; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D008670:Metals / Q000737:chemistry; D009055:Mouth / Q000737:chemistry; D010084:Oxidation-Reduction; D013499:Surface Properties
D003722:Dental Alloys; D008670:Metals; D003723:Dental Amalgam