Abstract
The effects of immersion disinfection of alginate impressions of various thicknesses on the reproducibility of stone models simulating a full crown preparation were investigated. Two types of alginate impression material : AROMA FINE DFIII (AFIII) characterized by smaller dimensional changes in water, and Jeltrate Plus (JLP) characterized by greater dimensional changes in water, were used. The impression thicknesses were adjusted to 1, 3, and 5mm. The impressions were immersed in 1% sodium hypochlorite solution for 10 min. The stone models obtained from treated impressions showed various dimensional changes and deformations depending on the type and thickness of impression. The effect of disinfection of AFIII on the dimensional change was small compared to JLP, and the disinfection of both impressions with 1 mm thickness had little effect.
