However, research reveal that this procedure only partially eliminates bacteria, fungi and viruses. Until 1991, to disinfect it was recommended the impressions washing under running water. 4- 6 Therefore, disinfection procedures are required before pouring of the cast. When in contact with saliva, blood and bacterial plaque, these impressions can act as a vehicle for the transferring of microorganisms, posing a serious threat if the necessary precautions are not taken. That is why the aim of this updated review is to know the effect of disinfectants on the dimensional stability of different impression materials after being subjected to different disinfection methods.ĭental impressions are a common procedure in the area of Oral Rehabilitation, 1 performed in order to obtain a plaster model that facilitates the fabrication of prosthetic elements. The available impression materials were not originally formulated to disinfect, so there is the potential for disinfection procedures to alter the physical features of the impressions and consequently the characteristics of the plater model. The most recommended procedures are immersion and spraying, using disinfectant solutions such as sodium hypochlorite, glutaraldehyde, iodophors and phenols at different concentrations. This allows to obtain much more accurate plaster models that allow the fabrication of prostheses. Disinfection, impressions, dimensional stability.Ī disinfectant must meet two fundamental requirements: be an effective antimicrobial agent and preserve the dimensional stability and surface details of the impression.
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