Tin and copper release related to charge transfer between short‐circuited amalgam and gold alloy electrodes

Abstract

Johansson BI: Tin and copper release related to charge transfer between short-circuited amalgam and gold alloy electrodes. ScandJ Dent Res 1986; 94: 259-66.Abstract -Short-circuited electrodes of dental amalgams and a gold alloy were used in an attempt to study a possible relationship between the quantity of copper and tin ions released into an electrolyte and the charge transferred between the electrodes. It was found that tinder the experimental conditions used the quantity of tin ions released was related to the charge transferred between the conventional amalgam and the gold alloy. The same tendency vvas found using a saliva sample which confined and collected the released tin ions into a small volume when the conventional amalgam specimen was short-circuited to the gold alloy specimen in vivo.

Corrosion current and pH rise around titanium coupled to dental alloys

“…The amount of tin released from one 1.0 cm' high copper amalgam filling (a goodsized MOD) under the conditions of the present study would be 9.9 mg Sn/cm^ over the entire 20-day period, 1.0 mg Sn/cm^ per day at the maximum, and 0.21 mg Sn/cm' per day at day 20; all implying proportionality between current and amount of tin released (15). The corresponding amounts of tin released from the conventional amalgam would be 4.8 mg Sn/cm', 0.6 mg Sn/cm' per day, and 0.03 mg Sn/cm' per day.…”