Effects of Immersion Disinfection of Agar/Alginate Combined Impressions on the Reproducibility of Stone Models

Abstract

The effects of immersion disinfection of impressions on the reproducibility of stone models obtained from agar/alginate combined impressions were examined.Two brands of agar and alginate impression materials were used.Impressions were disinfected by immersing in 2% glutaraldehyde solution for 30min and 0.5% sodium hypochrolite solution for 15min.The effects of disinfection on the reproducibility of stone models obtained from agar/alginate combined impressions were recognized.Using alginate impression materials with large hygroscopic expansion, the stone models obtained from impressions immersed in the glutaraldehyde solutions showed a large dimensional change.