BACKGROUND Dental handpieces undergo a decontamination process before reutilization. Thorough cleaning is a prerequisite to effective sterilization, to guarantee safety and prevent cross-infections. AIM To assess the cleaning efficacy offered by devices dedicated to dental handpieces. METHODS PIDTests©, which are patented tubes made 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 four different machines tested: X-Cid 2© (Micro-Mega) with a total of nine PIDTests©; iCare+© (NSK) with nine 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. FINDINGS In three 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. CONCLUSIONS 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 PIDTests© 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.

中文翻译：

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牙科手机机械清洁功效的评估。

背景技术牙科手机在重新使用之前经历净化过程。彻底清洁是有效灭菌的先决条件，以确保安全并防止交叉感染。目的评估专用于牙科手机的设备提供的清洁效果。方法PIDTests©是由透明材料制成的专利管，旨在替代清洁设备中的手机，并通过Soil Test©（Browne / STERIS）进行了人工染色。在测试的四台不同机器中，将PIDTests©连接到每个手机适配器上，执行了三个循环：X-Cid 2©（Micro-Mega），总共有九个PIDTests©； X-Cid 2©（Micro-Mega）。具有九个PIDTests©的iCare +©（NSK）；具有18个PIDTests©的DAC Universal©（W＆H）; 以及带有24个PIDTests©的BioDA 80©（VR2M）。进行视觉评估和缩二脲反应测试。发现在三个经过测试的清洁设备（X-Cid2©，iCare +©和DAC Universal©）中，所有PIDTests©的内表面和外表面均显示有土壤测试©残留物，表明清洁无效。只有BioDA 80©在所有PIDTests©上都没有残留污渍，缩二脲反应结果为阴性，从而使清洗有效。结论制造商应基于Sinner圆（影响补偿过程有效性的补偿参数，例如压力，温度，时间，清洁剂浓度）对清洁设备参数进行优化，以提高清洁效率并使牙科医生能够确保清洁效果。安全。尽管PIDTests©是唯一提供可视指示的专用工具清洗消毒器清洁效果的工具，