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Disinfection Archived Through 2012
 FAQ - Disinfection - Archived Through 2012



What is the appropriate disinfection technique for impressions? 

Cleaning and disinfecting impressions before pouring in stone is an important aspect of laboratory asepsis. Different materials require different handling techniques. In general, impressions should be gently scrubbed with a camel hair brush (i.e., artists brush, one-half inch bristle) and a liquid detergent to remove bioburden. Scrubbing gently with dental stone sprinkled into the impression will remove stubborn materials. Always consult the impression material manufacturer or instructions for use for advice on using compatible disinfectants. Hydrocolloid and polyether impression materials generally are sprayed to saturate for the required time with an intermediate level disinfectant and placed in a plastic bag or sealed container to prevent evaporation of the agent. More stable silicone (vinyl polysiloxane) or rubber-based impression material typically may be immersed for disinfection(1).

(1) OSAP. OSAP Position Paper: Laboratory Asepsis. November 1998. 


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