The science of dental materials covers a broad range of terminology, composition, microstructure and properties used to describe or predict the performance of preventive and restorative materials. Chemical properties generally comprise the behaviour of material in a chemical action with or without any other external influences. Mechanical properties are related to behaviour of materials in response to externally applied forces or pressure. Fillers are added to a formulation to lower the compound cost and to improve these properties. Data from Pubmed and Medline databases have been extracted.Hand search and grey literature were also assessed. This review gives a comprehensive view of the various fillers used in dental materials.