Abstract
We inverstigated the effects of immersion disinfection of both hydrophobic and hydrophilic vinyl silicone impressions on the reproducibility of stone models. Impressions were immersed in 2% glutaraldehyde solution for 30 minutes or 24 hours, and 1% sodium hypochlorite solution for 15 minutes or 24 hours. Hydrophobic vinyl silicone impressions were not affected on the reproducibility of stone models by immersion disinfection, and proved stable in long-term immersion disinfection. However, immersion disinfection of hydrophilic vinyl silicone impressions caused dimensional changes in the stone models. Those changes varied depending on the kind of disinfectant and duration of immersion time. Therefore, it was indicated that attention should be paid during the immersion disinfection of hydrophilic vinyl silicone impressions.
