There are other materials that can do this. Gold and sliver must be avoided unless nothing else can do their job! Closing the gap in teeth or making one is not permissible if it is for beautification as this is changing the creation of Allah unless it affects your speech, you eating or it is a defect and abnormality.

Can one have a silver tooth, like it’s not pulling your normal tooth out or screwing one it’s just a cap to put over the white tooth one can clean it (the inside of the cap) its more stylish rather then health but my tooth has a gap with the other tooth when i where this cap it doesn’t show a gap?