There are a few options available to provide a tooth coloured restoration to avoid or replace a silver amalgam one. These can be:
The white restoration can be shade matched to the tooth colour.
The digital technology used to provide indirect restorations allows for a highly accurate fit.
The cavities can be smaller due to the advantage of bonding to the tooth – amalgam restorations do not bond and therefore rely on undercut cavities for retention.
Amalgam fillings can cause staining over time.