Gold fillings have excellent durability, wear well, and do not cause excessive wear to the opposing teeth...
Fillings have a finite lifespan: an average of 12.8 years for amalgam and 7.8 years for composite resins.[2] One advantage of gold restorations is longevity, because gold can outlast other materials by three to five times longer. When describing other materials, dentists talk in terms of years of service, whereas with cast gold, dentists speak of decades of service. To achieve the greatest longevity, gold dental work must be done with sufficient skill and precision, so discerning patients should seek gold dentists with quality training, experience and expertise.
Gold restorations, if done properly, could last the lifetime of a patient. As life expectancies increase, thoughtful dental material choices become even more important to reduce the number of times that fillings and other restorations must be replaced. Repeated repairs to teeth can lead to pulpal inflammation and necrosis, root canal therapy and the eventual necessity for crowns in lieu of fillings. Restoring a tooth only once, with highly durable, non-toxic, biocompatible materials like gold, can be very appealing to discerning patients, and be less costly and painful in the long run.