Question

If a filling makes contact with a gold inlay in a nearby tooth, then`:

• A. Unpleasant metallic taste is released.
• B. Corrosion of filling ($Sn/Ag/Hg$) takes place.
• C. Both (a) and (b) take place.
• D. None of the above takes place.

Answer 1

The correct option is C Both (a) and (b) take place.

Since $Au$ is less electropositive metal than $Sn$ (in amalgam), so $Sn$ is oxidized to $S{n}^{2+}$ and the cavity is formed due to corrosion in the filling.