An evaluation of washer-disinfectors (WD) and dishwashers (DW) effectiveness in terms of processing dental instruments
2014
Purpose: The aim of this study is to consider the effectiveness of a small sample of dishwashers (DW) compared to washer-disinfectors (WD) for cleaning dental instruments prior to sterilisation. Processing instruments in the context of this article means cleaning and disinfecting the instruments. Materials and methods: A number of tests were carried out on three domestic dishwashers and two instrument washer-disinfectors. These tests included: visual test; soil test; residual protein test; and, the TVC of the final rinse water. Results: The washer-disinfectors (one bench-top and one underbench) passed all the tests. The results indicate that the instruments cleaned in the dishwashers were visibly clean and dishwashers passed the TOSI soil test. There was residual protein on some of the instruments cleaned in the all of the dishwashers and the final rinse water did not comply with standard ISO 15883. 1
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