BACTERIAL CONTAMINATION EFFECT OF DIFFERENT PROCEDURES APPLICABLE TO IMPRESSION SURFACE

Aim: the aim of this study is to examine two different measures of substance contamination with bacteria in the plaster model made from impressions taken. material and method: seven healthy dentate individuals aged 20-30 years were selected and 56 impressions were made. for this study hydrocolloid and elastomeric impression materials were used. according to the model casting method, impressions materials were divided into four groups: group 1: impressions with no treatment. group 2: impressions were only water rinsed. group 3: impressions were only disinfected with sodium hypochlorite (1:10). group 4: impressions were water rinsed and then disinfected with sodium hypochlorite (1:10). after gypsums hardening, the models were retrivied from impressions. for all groups bacterial swabs were collected with dry sterile cotton swab in mid palatal region of models. the samples were inoculated in blood agar media and incubated for bacterial growth for 3 days at 37 0c in incubator. results: in both impression material, but found to be contaminated with different species of bacteria in all groups underwent different processes, washed under running water of at least bacteria types sodium hypochlorite (1:10) and disinfected models (group 4) were found to be. conclusion: the findings are; showed only water washing is not an effective method for control of cross-infection.