title: Mechanical properties of elastomeric impression materials.
abstract: Dental elastomeric impression materials of different consistencies, representing addition and condensation silicones, polysulphides and a polyether, were studied to determine their mechanical properties in terms of tearing energy, tensile properties and modulus determined at high strain rates. Whilst the polysulphides had the greatest resistance to tearing, they were more extensible, had lower moduli of elasticity and lower tensile strengths than the silicones. The polyether resembled the silicones in many respects.
authors.affiliation: Biomaterials Science Unit, University of Manchester, U.K.
authors.forename: N S
authors.initials: NS
authors.lastname: Salem
authors.forename: E C
authors.initials: EC
authors.lastname: Combe
authors.forename: D C
authors.initials: DC
authors.lastname: Watts
mesh_terms: D055598:Chemical Phenomena; D002627:Chemistry, Physical; D003760:Dental Impression Materials; D003799:Dental Stress Analysis; D004548:Elasticity; D006801:Humans; D008433:Mathematics; D012117:Resins, Synthetic; D012828:Silicones; D013440:Sulfides; D013718:Tensile Strength
chemical_list: D003760:Dental Impression Materials; C022821:Impregum; D012117:Resins, Synthetic; D012828:Silicones; D013440:Sulfides; C032915:polysulfide