![]() 1 Studies have also shown that microbes of tuberculosis and hepatitis B can live for up to seven days or more at room temperature. In one study, some 67% of materials sent from dental offices to labs were found to be contaminated with Streptococci, Staphylococci, Candida species, MRSA, or P. Appropriate disinfection of dental impressions In this instance, what happens in the dental office doesn’t always stay in the dental office. These impressions can transport potentially infectious material, including disease-causing microorganisms such as hepatitis B and C, tuberculosis, and HIV, out of the dental office and contaminate others in the community. The visual analysis showed an obvious deviation in the buccal-lingual direction in group GD.ĭisinfectant (Cavicide) with benzethon chloramine and isopropanol as main active ingredients using spray disinfection has no effect on the accuracy of the alginate, polyether and vinylpolysiloxane impressions.Although digital impressions are the way of the future, many offices will continue to use impression material as part of their standard procedures. CC, P=0.002), while the difference between group BC and group CC was not statistically significant ( P=0.854). For the alginate material, the difference in posterior region between group GD and group BC, as well as group GD and group CC were statistically significant (GD vs. The color map of each superimposition was saved for visual analysis.įor the polyether and vinylpolysiloxane materials, the difference between the three groups was not statistically significant ( P=0.933, P=0.827). ![]() One-way ANOVA test and the LSD post-hoc test were used to compare the deviations between the three groups ( P < 0.05). The deviation in the anterior and posterior regions was evaluated respectively. Root mean square (RMS) was used to evaluate the deviations between the impression and the standard model. In the software, the digital models of the impressions were trimmed to teeth and then superimposed with the digitized standard model via best-fit alignment. All the impressions were digitized by the extraoral scanner (IScan D103i, Imetric) after disinfection and exported to a dedicated three-dimensional analysis software (Geomagic Qualify 2014, Geomagic, USA). After the impression taking was completed, the three groups underwent pure water rinse for 1 min (blank control, BC), 2% glutaraldehyde solution immersion disinfection for 30 min (glutaraldehyde, GD), and Cavicide solution spray disinfection for 5 min (Cavicide, CC), respectively. Subsequently, the impressions were randomly divided into three groups, with ten impressions in each group. For each kind of impression materials, thirty impressions were taken following the manufactures' instruction in the same conditions. The standard model was digitized by an extraoral scanner (IScan D103i, Imetric). The effect of Cavicide on three impression materials (alginate, polyether and vinylpolysiloxane) were assessed using a standard model. To assess the effect of disinfectant (Cavicide) with benzethon chloramine and isopropanol as main active ingredients disinfectant on dental impression accuracy.
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