These mercury-based compounds paired with at least one additional metal manipulate easily enough to fill any irregular volume during the short time it remains soft. Once it hardens after shaping, the resulting filling nearly always outlasts less durable composite fillings over an average span of 10-12 years. The highest quality resin-based composites ordinarily last about half that long, though composite technology advancements and more sophisticated placement techniques are closing the longevity gap.
In the meantime, dental amalgam offers a host of advantages over other viable options:
To be fair, composite (white) fillings suit some patients better than amalgam in the long run. Select instances, such as occlusal restorations and enamel sites beyond the height of contour, call for a composite’s more conservative preparation. Fitting amalgam to an occlusal restorations in particular can require removing otherwise sound tooth structures.
Both amalgam and composite fillings have received the American Dental Association on Scientific Affairs’ approval as safe and effective substances for tooth restoration.
Your amalgam “silver” fillings will be replaced if there is signs of fractures, leakage or cavities