The purpose of this study was to achieve the reduction of the reduction of the galvanic current between the dental amalgam alloy and gold. In order to measure the galvanic current between these two metals a prep in the size of 4±13mm which was
filled
with amalgam and another prep of 4×2mm was filled with gold alloy was made in the acrylic resin. These two preps were then connected to a 2mm diameter coper wire. Using an ammeter to measure the galvanic current, six different kinds of amalgam
and
gold
alloy were immersed in saline solution with approximately 10mm distance between the two alloys. Chemical agents that are thought to reduce the galvanic current such as hydrazine. Silver nitrate, potassium chromate, and bonding agents such as
Scotch
bond
2(3M) and All bond 2(Bisco) were applied to the alloy surface. Cathodic inhibitor such as hydrazine was applied to gold alloy where as anodic inhibitor such as silver nitrate and potassium chromate were applied to amalgam. Both bonding agents,
Scotch
bond 2(3M) and All bond 2(Bisco), were applied to amalgam. The following results were obtained when the currency on the coated alloy surface was compared to
@ES the uncoated surface.
@EN 1. The galvanic currency went down as the time elapsed and after 30 minutes no change was detected.
2. Initial currency was higher in low copper amalgam compared to high copper amalgam. Intitial currency was the highest in low copper lathe-cut amalgam.
3. Group of gold coated with hydrazine had the most reduction in galvanic currency.
4. Group of amalgam coated with silver nitrate or potassium chromate also showed significant reduction in galvanic currency.
5. The bonding agents also helped reduce galvanic currency.
6. Of all the agents used to reduce galvanic currency, silver nitrate showed the best result.
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