Abstract
Agar/alginate combined impressions, with 4 brands of agar impression materials, were immersed in solutions of 0.5% sodium hypochlorite for 15 minutes and 2% alkaline or acidic glutaraldehyde for 30 minutes.The impressions were poured with die stone, then surface roughness and dimensional accuracy were measured.A 15-minute immersion of combined impressions in 0.5% sodium hypochlorite did not adversely affect the surface roughness and dimensional accuracy of stone dies.However, 30-minute immersion of them in alkaline glutaraldehyde solutions increased the surface roughness of stone dies.
