The standard in many dental practices today is to use completely metal-free fillings to treat cavities. These “tooth-coloured” fillings have supplanted the amalgam, metallic-looking fillings of the past, many of which contained small levels of mercury. Tooth-coloured fillings are composed of a durable composite resin material that can more easily blend in with the affected tooth’s natural colour, making it virtually unnoticeable. It can be used to fill cavities, replace old fillings, restore broken cusps of teeth, and to replace worn enamel.