Efficacy of various spray disinfectants on irreversible hydrocolloid impression materials: An in vitro study

Background: Most of the materials (casts, impressions, etc.) that are sent to the dental laboratories show the presence of numerous pathogenic microorganisms. All the spray disinfectants are not equally effective against these microorganisms. Aims and Objectives: The aim was to compare the effective...

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Bibliographic Details
Published inIndian journal of dental research Vol. 22; no. 6; pp. 764 - 769
Main Authors Doddamani, Santosh, Patil, Raghunath, Gangadhar, S
Format Journal Article
LanguageEnglish
Published Mangalore Medknow Publications and Media Pvt. Ltd 01.11.2011
Medknow Publications & Media Pvt. Ltd
Wolters Kluwer Medknow Publications
Subjects
dental casts
Dentistry
Disinfection & disinfectants
Irreversible hydrocolloid impression
Microorganisms
Sodium hypochlorite
spray disinfectants
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Summary:Background: Most of the materials (casts, impressions, etc.) that are sent to the dental laboratories show the presence of numerous pathogenic microorganisms. All the spray disinfectants are not equally effective against these microorganisms. Aims and Objectives: The aim was to compare the effectiveness of different spray disinfectants on irreversible hydrocolloid impressions and to find out the most effective dilution, contact time, and effect against each microorganism studied. Materials and Methods: The effects of four spray disinfectants, 5.25% sodium hypochlorite, 0.525% sodium hypochlorite, 1:213 (1 part in 213 parts of water) povidone iodine, and 2% glutaraldehyde along with control (distilled water) on irreversible hydrocolloid impressions contaminated with Staphylococcus aureus, Bacillus subtilis and Streptococcus viridans were studied. Results: Sodium hypochlorite, 5.25%, showed 1-min exposure time which was able to effect a 4log10 reduction in bacterial counts against S. aureus and S. viridans followed by 0.525% sodium hypochlorite and 2% glutaraldehyde for 10 min. None were able to effect a 4 log10 reduction against B. subtilis. Conclusion: Sodium hypochlorite with a concentration of 5.25% was the most effective disinfectant and required the shortest contact time (1 min). Not all ADA-approved concentrations of surface disinfectants work equally well on irreversible hydrocolloid impression materials.
ISSN:0970-9290
1998-3603
DOI:10.4103/0970-9290.94662