Silver amalgam filling is made by mixing liquid mercury with silver alloy powder. Dental amalgam is a common material used to fill cavities.This is commonly known as silver fillings.
It is a very rigid material and is the strongest direct restorative material.The longevity of the material is very good. It is less technique sensitive.
It is indicated for restoration of posterior teeth. It is an economical option for patients who cannot afford other restorations like composite.
The caries is removed and proper cavity form is given, a base or liner is placed and then silver amalgam is filled in the cavity. Initial strength is achieved in the first hour after restoration so patients are advised not to eat for at least one hour after the filling. For at least 8 hours the tooth should not be subjected to heavy biting forces as it then achieves 70% of strength.
The wear resistance is excellent and abrasiveness against enamel is negligible.