[Addition cross-linked silicone impression materials]

The principle of the polyreactions "polymerization", "polycondensation" and "polyaddition" is explained and described in detail for silicone impression materials. In the light of laboratory findings (quasi-viscosity, plasto-elasticity, dimensional and weight behaviour), three alginate materials, one condensation cross-linked silicone material, two addition cross-linked silicone materials and one polyether material are compared and evaluated with regard to their clinic-relevant properties.