Abstract
This study investigated the effect storing alginate impressions in sealed bags after spraying with disinfectant solutions on the surface roughness of stone models. Twelve brands of alginate impression materials available commercially and two disinfectants for spray, 2% glutaraldehyde and 1% sodium hypochlorite solutions, were used. The periods for storage of impressions in sealed bags after spraying were 2 and 4 hours. After storage, mixed dental stones were poured into the impressions to make stone models. For comparison, the stone models obtained from the stored impressions without spraying and the stone models obtained from the impressions neither sprayed nor stored were prepared.
There were brands of alginates with which the surface roughness of the resultant stone models increased by spraying with disinfectant solutions, and by contrast some brands of alginates with which it did not increase. These results proved that alginate impressions could be stored in sealed bags for 2-4 hours after spraying with disinfectant solutions without increase in surface roughness of the stone models by means of selecting the suitable combination of alginate and disinfectant to be used for the storage following spraying.
