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DISINFECTION OF IMPRESSION MATERIALS

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mithilamhapankar's picture
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Joined: 9 Dec 2009

ALGINATE---Immersion with caution in disinfectant like chlorine compounds or iodophors, with short term exposure time..less than 10 mins.Glutaraldehyde may be used but the short time isnt enough for disinfection.

POLYSULFIDE SILICONE---Immersion in glutaraldehydes, chlorine compounds, iodophors or phenolic compounds...Disinfectants that need more than 30mins to act shouldn't be used

POLYETHER---Immerse cautiously in chlorine compounds or iodophors but only for 10mins duration..to avoid distortion.

ZOE IMPRESSION PASTE & IMPRESSION COMPOUND---Though immersion is preferred spraying of iodophors or glutaraldehydes can be done..However zoe pastes are not compatible with chlorine compounds

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sushantpatel_doc's picture
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Joined: 30 Nov 2009
Re: DISINFECTION OF IMPRESSION MATERIALS

There is a continuing concern over the potential for cross-contamination of viral infections such as AIDS by means of dental impressions. This investigation compared the effects of various viricidal agents on the accuracy of irreversible hydrocolloid and silicone impressions made of single-unit and full mandibular arch models. Measurements on casts made from the treated impressions were compared with the corresponding measurements on casts made from untreated impressions. The results of this study led to the conclusions that there was no preferred disinfectant with respect to dimensional stability for the irreversible hydrocolloid, condensation silicone, or vinyl polysiloxane impression materials tested, and there was no difference in the accuracy of the casts obtained either by spraying with or immersion in any of the disinfectants tested. Therefore using the disinfectants described with either the immersion or spray techniques will not significantly affect the dimensional accuracy of cats made from treated impressions.

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