Abstract
In order to explore the physical properties of ten kinds of the addition-type silicone impression materials on the market, the ingredients of all materials were investigated in this report.Findings are follows.1)It was found that the base paste prepolymers were hydrogen-polysiloxane and the catalyst paste prepolymers were vinyl-polysiloxane.2)Molecular weights of each prepolymer without those of PRECICON increased with increasing the viscosity value of each type(fine, regular, heavy or putty).3)The ingredients of fillers, a contents of which increased with increasing the viscocity value of each type, were SiO2, quartz, and quartz and Ca compound.4)The shape of the great parts of fillers were similar but those of 3MP were indeterminate, and the distributions of filler size were independent on the viscocity value of materials without PRECICONE.
