Abstract
For taking accurate impressions, many material characteristics of the impression materials must be well understood. It is especially important to analyze the viscoelastic behavior of the impression materials. In our study, seven commercial alginate impression materials were used, and their linear viscoelasticity was measured using a creep meter (RE-3305, Yamaden Co.). The measurement condition were: load speed 0.5mm/sec, sample form φ 30mm×40mm, room temperature 23°C.
As for the results, the linear viscoelasticity of seven alginate impression materials appeared lower in stress and strain than expected, and their measurement values were from about 3.40% to 2.01%. Thus, we can consider them a standard for taking accurate impressions.
