Written and maintained by CASRAI Editorial Board
Last updated
General product and regulatory information only, drawn from the FDA and the Code of Federal Regulations. It is not medical or dental advice; questions about a particular denture belong with a dental professional.
Short answer
Denture adhesive is a paste, powder or adhesive pad placed in or on a denture to help it stay in place. In the United States it is a regulated medical device: under 21 CFR 872.3410 the ethylene oxide homopolymer and/or carboxymethylcellulose sodium type is Class I and exempt from premarket notification. The FDA says it gives temporary relief and does not replace a properly fitted denture.
Definition and scope
The federal regulation 21 CFR 872.3410 identifies an ethylene oxide homopolymer and/or carboxymethylcellulose sodium denture adhesive as a device containing those substances, “intended to be applied to the base of a denture before the denture is inserted in a patient’s mouth”, with the purpose of improving denture retention and comfort. It classifies the device as Class I (general controls) and exempts it from the premarket notification procedures in subpart E of part 807, subject to the limitations in 21 CFR 872.9 (date checked 2026-10-30, Cornell Legal Information Institute copy of the CFR).
That wording is narrower than the everyday term. The regulation names two ingredient families; this page does not state the classification of any product with a different composition.
How denture adhesive is used in practice
The FDA consumer page on denture adhesives (content dated 2018-09-04, date checked 2026-10-30) describes them as pastes, powders or adhesive pads that may be placed in or on dentures to help them stay in place, and notes that some contain zinc to enhance adhesion. Its guidance is that properly fitted and maintained dentures should not usually require an adhesive. Because bone in the mouth shrinks over time, dentures gradually loosen; the FDA says that when this happens the denture should be relined or a new one made, and that adhesive only fills gaps and gives temporary relief.
Use directions come from each product’s labeling.
Forms and related concepts
Forms named by the FDA
- Pastes, the first of the three forms the FDA lists.
- Powders, the second listed form.
- Adhesive pads, the third listed form.
Zinc-containing and zinc-free products
The FDA states that some adhesives contain zinc and that zinc-free products exist. It also notes that manufacturers may not always list their product ingredients, so the label is the place to check.
Related concept: denture fit
Adhesive and fit are separate issues. The FDA says adhesive does not necessarily address problems with ill-fitting dentures.
Where it matters for clinics and supply decisions
The FDA states that manufacturers, importers and distributors of denture adhesives are required to register their facilities, list their products and report adverse events, and to follow general controls such as good manufacturing practice and adequate directions for use. For staff who handle device supply, that gives four documented checkpoints, each traceable to the FDA page above:
| Checkpoint | What the FDA page says |
|---|---|
| Registration and listing | Manufacturers, importers and distributors must register facilities and list products. |
| Adverse event reporting | These parties must report adverse events. |
| Directions for use | Labeling must carry adequate directions for use or a clear definition of an unsafe dosage or methods or duration of application. |
| Zinc labeling | In 2011 the FDA asked makers of zinc-containing products to consider changes to directions and labeling. |
Other adhesive-related supply topics on this site include the causes of allergic reaction to medical tape, the Hypafix retention dressing and the contents of a home health aide supply kit.
The zinc question, as the FDA frames it
The FDA reports that case reports in the medical literature link nerve problems to chronic overuse of zinc-containing adhesives. It also says it “has not found conclusive evidence” that these problems result from using zinc-containing denture adhesive as instructed in the labeling, and that its adverse event system is not designed to establish injury rates or tie injuries to particular brands or types. In 2011 the FDA asked makers of zinc-containing products to consider changes to their directions and labeling.
Common misunderstandings
- “Adhesive fixes fit.” The FDA says adhesive does not necessarily fix an ill-fitting denture.
- “Zinc in adhesive is proven harmful.” The FDA describes the link to overuse as appearing in case reports, and has not found conclusive evidence of harm at labeled use.
- “A loose denture just needs adhesive.” Per the FDA, loosening from bone shrinkage calls for relining or a new denture; adhesive is temporary.
- “Class I means no oversight.” Per the FDA page, makers still owe registration, listing, adverse event reporting and good manufacturing practice.
FAQ
What is denture adhesive?
A paste, powder or pad placed in or on a denture to help it stay in place, regulated by the FDA as a device. The FDA says it provides temporary relief for dentures loosened by bone shrinkage.
How does the FDA classify denture adhesive?
For ethylene oxide homopolymer and/or carboxymethylcellulose sodium products, 21 CFR 872.3410 sets Class I with exemption from premarket notification.
Does denture adhesive contain zinc?
Some do and some do not. The FDA notes that zinc-free products exist and that ingredients are not always listed, so the product label is the source to check.
Can adhesive replace a denture reline?
According to the FDA, no. It fills gaps temporarily; loose dentures should be relined or replaced.
Sources
- U.S. FDA, “Denture Adhesives”, https://www.fda.gov/medical-devices/dental-devices/denture-adhesives, content dated 2018-09-04, date checked 2026-10-30.
- 21 CFR 872.3410, “Ethylene oxide homopolymer and/or carboxymethylcellulose sodium denture adhesive”, https://www.law.cornell.edu/cfr/text/21/872.3410, date checked 2026-10-30.
