Choose the Right Filling Material for You White or Silver? There are a variety of different materials that can be used for filling teeth. Amalgam fillings are more commonly known as silver or mercury fillings. They are made up of silver, tin, copper, zinc, and mercury. Composite resin fillings are more commonly known as white fillings, tooth-coloured fillings, and direct veneers. They are made up of very tiny pieces of silica surrounded by a plastic resin.