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To access this CPD article, visit: https://www.nature.com/articles/s41415-022-4397-1

Article: Denture cleanliness and hygiene: an overview

1. According to the Medical Devices Regulations Act 2002, Healthcare Products Regulatory Agency (2013), and Medical Devices Directive, what type or class of medical device are dentures categorised as?

A. Class I

B. Class IIa

C. Class IIb

D. Class III

2. When using the Denture Cleanliness Index, if denture hygiene was scored as DCI 3, this means:

A. clean denture. No plaque is visibly seen, no staining, no plaque detectable

B. denture is visibly clean. Little staining (<25% fit surface stained)

C. denture has visible plaque and/or debris. Moderate staining of fit surface (25-50% fit surface stained)

D. denture has visible plaque and/or debris. Severe staining of fit surface (>50% fit surface stained)

3. Typically, bleach-based denture cleaners contain which active ingredient?

A. sodium hypochlorite

B. sodium bicarbonate

C. amylase enzymes

D. chlorhexidine digluconate

4. Which denture cleaning method is generally considered the most compatible with respect to any commonly prescribed denture materials?

A. manual cleaning with stiff toothbrush and smokers toothpaste

B. bleach-based denture cleaner

C. microwave irradiation

D. effervescent type denture cleaner

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