Written and maintained by CASRAI Editorial Board
Last updated
General product information only. This page is not medical or dental advice; follow the product label and your dentist’s instructions for any specific denture.
Short answer
Denture cleaning tablets are over-the-counter denture cleansers: in the United States, FDA regulates them as Class I devices under 21 CFR 872.3520 (product code EFT), exempt from premarket notification. The Cochrane review of denture-cleaning methods found only weak evidence for soaking in effervescent tablets and no reliable evidence on which method works best.
Definition and scope
FDA’s regulation defines an OTC denture cleanser as a device made of material in the form of a powder, tablet, or paste that is intended to remove debris from removable prosthetic dental appliances, such as bridges or dentures. The appliance is taken out of the mouth when it is cleaned. A denture cleaning tablet is therefore the tablet form of this device category, not a separate class of product (21 CFR 872.3520(a), checked 2026-10-30).
FDA’s product classification database lists the category as “Cleanser, Denture, Over The Counter”, product code EFT, device class 1, regulation number 872.3520, in the Dental review panel (openFDA classification record, checked 2026-10-30). Adhesives that hold a denture in place are a different product group; see the CASRAI guide to denture adhesive.
How cleaning tablets fit among denture-cleaning methods
The Cochrane review Interventions for cleaning dentures in adults (CD007395) describes denture plaque removal as using several methods: brushing with paste, soaking in chemicals (for example effervescent tablets or bleach), and special devices such as a microwave oven or an ultrasonic device. Plaque on removable dentures matters because, per the review, it can lead to infection of the denture-supporting mucosa (stomatitis), gum inflammation and tooth decay.
The review included trials of adults wearing removable partial or complete dentures and compared mechanical methods (such as brushing or ultrasound) with chemical ones (such as enzymes, sodium hypochlorite, oral rinses or peroxide solutions). Tablets sit in the chemical-soaking group. Which tablet ingredients, soak times and water temperatures apply to a given product is set out on that product’s own label.
Forms of the device named in the regulation
| Form named in 21 CFR 872.3520(a) | Regulatory status |
|---|---|
| Tablet | Class I, general controls; exempt from premarket notification |
| Powder | Class I, general controls; exempt from premarket notification |
| Paste | Class I, general controls; exempt from premarket notification |
Source: 21 CFR 872.3520(a) and (b), checked 2026-10-30. The exemption is subject to the limitations in 21 CFR 872.9, so the regulation text is the place to check an individual product’s status.
Where it matters for labs, clinics and supply decisions
- Regulatory category. A product sold as an OTC denture cleanser falls in Class I, so it is not expected to carry a 510(k) clearance number. Class I means general controls apply (21 CFR 872.3520(b)). Background on how device classes arose is in the entry on the Medical Device Amendments of 1976.
- Strength of evidence. The Cochrane authors found weak evidence supporting soaking in effervescent tablets or enzymatic solutions, and reported that brushing with paste removes plaque and kills microbes better than inactive treatments. They found a lack of evidence on comparative effectiveness between the methods.
- Metal components. The data found in the review were restricted to cleaning complete acrylic-resin dentures. The authors called for research on how removable partial dentures can be cleaned, in particular on the corrosive effects of cleaners on their metallic components. This is an open question in the review, not a finding of harm.
Common misunderstandings
“Tablets replace brushing”
The Cochrane review does not show that. It lists brushing with paste and chemical soaking as separate methods, found weak evidence for tablet soaking, and found no evidence establishing which method is most effective. Evidence for tablets as a substitute for brushing is not established.
“Class I means clinically proven”
Class I is a regulatory classification under general controls. It describes the type of FDA oversight, and it is separate from the strength of clinical evidence, which the Cochrane review rates as weak for tablet soaking.
“The review shows tablets are ineffective”
It does not. The authors state that the trials were too varied to pool and that evidence on comparative effectiveness is lacking; absence of strong evidence is different from evidence of no effect. The review’s search ran to May 2009, and the page for it is listed with a 2021 issue, so readers should check for newer trials.
Frequently asked questions
What are denture cleaning tablets?
Tablet-form OTC denture cleansers, meant to remove debris from removable dental appliances that are taken out of the mouth for cleaning (21 CFR 872.3520).
Does FDA regulate denture cleaning tablets as medical devices?
Yes. FDA classifies the OTC denture cleanser as a Class I dental device, regulation number 872.3520, product code EFT, exempt from premarket notification.
Is there good evidence that soaking in tablets works?
The Cochrane review describes the evidence for soaking in effervescent tablets or enzymatic solutions as weak. Its authors also report a lack of evidence on how the methods compare. Terms such as randomized controlled trial and the Cochrane Handbook explain how such reviews are built.
Do the studies say anything about dentures with metal parts?
The Cochrane review identifies the corrosive effect of cleaners on metallic components of partial dentures as a research gap, so the question is open rather than answered.
Sources
- U.S. Code of Federal Regulations, 21 CFR 872.3520, OTC denture cleanser (Cornell LII): https://www.law.cornell.edu/cfr/text/21/872.3520, checked 2026-10-30.
- FDA, Product Classification, product code EFT, openFDA device classification API (record last updated 2026-10-19): https://api.fda.gov/device/classification.json, checked 2026-10-30.
- Cochrane, Interventions for cleaning dentures in adults, CD007395: https://www.cochrane.org/evidence/CD007395_interventions-cleaning-dentures-adults, checked 2026-10-30.
