Shaikh Bin Baz rahimahullah said:

“As for placing a tooth of silver or gold, if a need calls for it then there is no harm. Otherwise, what is more deserving is to use other than gold and silver from other jewels and other material. There are other material that can be taken as teeth other than gold and sliver that suffice from gold and silver. However, if there is a need that calls for gold and silver, then there is no harm in regards to the men. As for a woman, then there is no harm in that. If a call need calls for it, then there is harm in that”

[Reference]

Translated by

Faisal Ibn Abdul Qaadir Ibn Hassan
Abu Sulaymaan