Evaluation of the mechanical cleaning efficacy of dental handpieces.

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Evaluation of the mechanical cleaning efficacy of dental handpieces.

J Hosp Infect. 2018 Nov 27;:

Authors: Offner D, Brisset L, Musset AM

Abstract
OBJECTIVE: Dental handpieces undergo a decontamination process before reutilization. Thorough cleaning is a prerequisite to effective sterilization, to guarantee safety and prevent cross-infections. The objective of this study was to assess the cleaning efficacy offered by devices dedicated to dental handpieces.
MATERIAL AND METHODS: PIDTests©, which are patented tubes made out of transparent material and designed to replace handpieces in cleaning devices, were artificially stained by Soil Test© (Browne/STERIS). Three cycles were performed with PIDTests© connected to every handpiece adapter in the 4 different machines tested: X-Cid 2© (Micro-Mega) with a total of 9 PIDTests©; iCare+© (NSK) with 9 PIDTests©; DAC Universal© (W&H) with 18 PIDTests©; and BioDA 80© (VR2M) with 24 PIDTests©. A visual evaluation and a biuret reaction test were performed.
RESULTS: In 3 of the tested cleaning devices (X-Cid2©, iCare+© and DAC Universal©), all of the PIDTests© showed Soil Test© residues, on the internal and external surfaces indicating cleaning was ineffective. Only the BioDA 80© showed no residual stains on all the PIDTests© and negative biuret reaction test results, making the cleaning effective.
CONCLUSION: Manufacturers should optimize the cleaning device parameters, based on the Sinner circle (grouping compensatory parameters which influence the effectiveness of a cleaning process, such as pressure, temperature, time, detergent concentration), to improve cleaning efficacy and enable dental surgeons to ensure the safety. Although PIDTest© are the only tool to provide visual indications on the cleaning efficacy of washer-disinfectors dedicated to handpieces, manufacturers should continue with the development of improved and validated tools to assess cleaning efficacy.

PMID: 30500388 [PubMed - as supplied by publisher]

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