Cleaning of Dental Handpieces: A Method to Test its Efficiency, and its Evaluation With a Washer-DisinfectorLubricator-Dryer.
When using dental handpieces, a phenomenon of backflow leads to an external and internal soiling and contamination of HP, especially in their narrow air/water pipes.
To prevent any cross-infection, HP need to be sterilized after a thorough cleaning. This work aims
to establish and assess a method for testing their cleaning. Indeed, there is a methodological gap
concerning its validation because of their complex architecture.
This method is declined into a protocol using artificial soilings and
ninhydrin tests. Its evaluation with a washer-disinfector-lubricator-dryer within
cleaning cycles with each HP and after control tests, heads to validate its relevance and to
demonstrate the effectiveness of the cleaning provided.
After each cycle, all HP were externally clean. Our method also showed an internal
cleanliness except for HP whose engines in the automaton were defective.
This work fits with the improvement of infection control in dental practices. It is
the first method developed to control the internal cleaning of HP without having to break them,
and it demonstrates the need for HP to be put into an internal rotation during their cleaning.
It fills the methodological gaps concerning their cleaning and allows assessing HP cleaning from
dedicated WDLD. According to standard NF EN ISO15883 the method.
Dent Open J. 2016; 3(1): 10-16. doi: 10.17140/DOJ-3-129