A type of white filling, glass ionomer fillings are constructed from a natural looking cream-coloured substance. Made from a combination of glass particles, acrylic and a setting agent. Unlike traditional amalgam fillings, they form a chemical bond with teeth, this therefore reduces the risk of further damage or decay.
Glass-based fillings have proved to be almost as strong as traditional fillings but are far more versatile. Glass Lonomer fillings are commonly used for a number of cavities including inlay filling cementation, front tooth fillings and fillings around the neck and root of the tooth.
Glass fillings also release fluoride on to the teeth, which helps to prevent further tooth decay in that area.