Composite resin was previously not as durable as the metallic filling. Through the development of dental technology, however, composite resins become more and more resistant. The use of classical black fillings, nowadays, has been greatly reduced, as composite resin is more pliable and serves aesthetic purposes. Also, the latest scientific studies question the safety of the amalgam for the patient, as it is considered to be toxic. So, we think that composite resin is superior, compared to the amalgam. For this reason, if there are any old metallic fillings in our mouth, they should be replaced and removed, even if they have not undergone any corrosion.