Abstract
The aim of this study is to assess the efficacy of microwave irradiation in disinfecting gypsum casts and also to compare its efficacy with validated method of chemical disinfection. The present study is an ex vivo study conducted on a sample of five irreversible hydrocolloid impressions in vitro and on ten patients gypsum casts in vivo following standard impression techniques to check the efficacy of microwave oven irradiation and compare its efficacy with standard chemical method of disinfection. Results were analysed using Mann–Whitney test and Wilcoxon signed rank test. Untreated gypsum casts showed cfu/ml counts with a median log value of 6, while microwave-irradiated ones had median cfu/ml counts of 0. Casts poured from chemically disinfected impressions demonstrated cfu/ml counts with a median log value of 5. Microwave irradiation was found to be effective in disinfecting gypsum casts when compared to chemical disinfectant in disinfecting dental impressions.
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I am grateful to the Research Committee of Manipal University for financial support, to Dr Aparna IN and Dr Dhanasekhar for their guidance and Dr Rakshith Guru for his helpful comments on the manuscript, and also to the reviewers for their helpful comments on the manuscript.
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Kalahasti, D., Hegde, V., Kosaraju, K. et al. Evaluation of Efficacy of Microwave Irradiation in Disinfecting Dental Gypsum Casts: An Ex Vivo Study. J Indian Prosthodont Soc 14, 381–392 (2014). https://doi.org/10.1007/s13191-013-0337-8
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DOI: https://doi.org/10.1007/s13191-013-0337-8