<P> Dental materials are specially fabricated materials, designed for use in dentistry . There are many different types of dental material, and their characteristics vary according to their intended purpose . Examples include temporary dressings, dental restorations (fillings, crowns, bridges), endodontic materials (used in root canal therapy), impression materials, prosthetic materials (dentures), dental implants, and many others . </P> <P> A temporary dressing is a dental filling which is not intended to last in the long term . They are interim materials which may have therapeutic properties . A common use of temporary dressing occurs if root canal therapy is carried out over more than one appointment . In between each visit, the pulp canal system must be protected from contamination from the oral cavity, and a temporary filling is placed in the access cavity . Examples include: </P> <Ul> <Li> Zinc oxide eugenol--bactericidal, cheap and easy to remove . Eugenol is derived from oil of Cloves, and has an obtundant effect on the tooth and decreases toothache . It is suitable temporary material providing there are no biting forces on it . It is also contraindicated if the final restorative material is composite because eugenol adversely effects the bond / polymerization process . Examples brands: Kalzinol, Sedanol . </Li> </Ul> <Li> Zinc oxide eugenol--bactericidal, cheap and easy to remove . Eugenol is derived from oil of Cloves, and has an obtundant effect on the tooth and decreases toothache . It is suitable temporary material providing there are no biting forces on it . It is also contraindicated if the final restorative material is composite because eugenol adversely effects the bond / polymerization process . Examples brands: Kalzinol, Sedanol . </Li>

List the properties of dental materials and how they affect their application