Quick facts
- A disposable fluoride tray is the styrofoam or foam trough a patient bites on, filled with fluoride solution or gel, to apply the fluoride topically to the teeth.
- In the United States it files under 21 CFR 872.6870, Disposable fluoride tray, at Class I (general controls), product code KMT.
- The US entry exempts the tray from premarket notification subject to the limits of section 872.9, and — where the device is not labelled or represented as sterile — from the quality management system requirements of part 820 except for records and complaint files.
- Canada keeps no named entry. A tray placed in the mouth is an invasive device that enters the body through a body orifice, and Rule 2(2) of Schedule 1 places a device intended to be placed in the oral cavity as far as the pharynx at Class I.
- The same class is reached by the other route as well: read as a non-invasive article, the tray falls to Rule 7(1), which also gives Class I. Both readings land in the same place.
- Entries, classes, product codes and rule text below were checked against the eCFR, the consolidated Regulations and the openFDA classification database on 2026-10-14.
A disposable fluoride tray is a small trough that holds a fluoride gel or solution against the teeth while the patient bites down on it. It is one of the few devices in a dental operatory whose class is decided by a question that sounds trivial and is not: does the tray go into the mouth, or is it an article that sits on a bench? The United States answers with a named Class I entry that also carries a quality-system carve-out. Canada derives the same class by the route for a device placed in the oral cavity. This article sets out both routes and what a practice should record, with the three-layer dental bibs that cover the patient during the application.
What is a disposable fluoride tray?
It is a device made of styrofoam or a similar foam, intended to apply fluoride topically to the teeth. It is supplied in a range of sizes and in two general forms: a full-arch tray that covers the whole dentition, and a dual-arch or quadrant form used where the application is limited. The tray is filled with the fluoride the clinician has chosen, seated over the teeth, and held while the patient bites down for the contact time the product instructions state. It is then discarded.
That description is what puts the tray in a different regulatory family from the fluoride gel or varnish it carries. The tray is the article that delivers material to the teeth; the fluoride is a separate product with its own labelling. A practice that switches gels and keeps its trays has changed one article and not the other, and the two lines are recorded separately in an order for exactly that reason.
Is a disposable fluoride tray a Class I device in the United States?
Yes. 21 CFR 872.6870 is titled Disposable fluoride tray and the identification reads: \"A disposable fluoride tray is a device made of styrofoam intended to apply fluoride topically to the teeth. To use the tray, the patient bites down on the tray which has been filled with a fluoride solution.\" The entry sits at Class I (general controls), exempts the tray from the premarket notification procedures in subpart E of part 807 subject to the limits in section 872.9, and adds a carve-out that turns on sterility.
The carve-out is the part worth reading slowly. If the tray is not labelled or otherwise represented as sterile, it is exempt from the current good manufacturing practice requirements of the quality management system regulation in part 820, except for the requirements on records and complaint files. Label a tray as sterile and that exemption no longer applies to it. The openFDA device classification API lists product code KMT (Tray, fluoride, disposable) under this regulation number.
| Item | Detail |
|---|---|
| US regulation | 21 CFR 872.6870 - Disposable fluoride tray |
| US class | Class I (general controls) |
| Product code | KMT (tray, fluoride, disposable) |
| Route to market | Exempt from premarket notification under subpart E of part 807, subject to the limits of section 872.9 |
| Quality-system carve-out | Exempt from part 820 except records and complaint files, where the tray is not labelled or represented as sterile |
| Stated intended use | To apply fluoride topically to the teeth |
How does Canada classify a disposable fluoride tray?
Canada keeps no named entry, so the class is derived from Schedule 1 of the Medical Devices Regulations, and the first question is whether the tray is an invasive device. The Regulations define an invasive device as one that is intended to come into contact with the surface of the eye or to penetrate the body, either through a body orifice or through the body surface. A tray that the patient bites on is placed in the oral cavity — a body orifice — so it is an invasive device, and Rule 2(1) would place it at Class II. Rule 2(2) then takes it back down: a device described in subrule (1) that is intended to be placed in the oral or nasal cavities as far as the pharynx is classified as Class I. A fluoride tray is held between the teeth and does not reach the pharynx, so subrule (2) applies and the class is Class I.
The second route reaches the same place, and it is worth stating because suppliers sometimes assume the answer depends on which one a reader picks. Read the tray as a non-invasive article rather than one that enters a body orifice, and Rule 7(1) gives it Class I as well: \"Subject to subrule (2), all other non-invasive devices are classified as Class I.\" The two near misses are Rule 3(a), which would lift a denture material or an orthodontic appliance to Class II — a fluoride tray is neither — and Rule 7(2)(a), which would lift a device used as a calibrator, tester or quality-control support to another device, which a tray is not.
| Item | Canada | United States |
|---|---|---|
| Named entry | None; classified by rule | 872.6870 - Disposable fluoride tray |
| Class | Class I (Rule 2(2); also Rule 7(1) on the non-invasive reading) | Class I (general controls) |
| Governing text | Schedule 1, Part 1, Rules 2(2) and 7(1) | 21 CFR 872.6870 |
| Sterility carve-out? | No equivalent; the class does not turn on whether the tray is sterile | Yes; the part 820 carve-out applies only to a tray not represented as sterile |
| Route to market | Class I obligations under the Regulations | Exempt from premarket notification, subject to section 872.9 |
Which tray is which for a purchase order?
The trays a practice orders differ in coverage rather than in class. A full-arch tray covers the whole dentition in one application; a dual-arch tray holds the upper and lower arches in one piece; a quadrant or sectional tray is used where a limited area is being treated. The class does not change from one to the next, because all of them are placed in the oral cavity for the same purpose.
| Tray form | What it covers | Typical use | Class, Canada | Class, US |
|---|---|---|---|---|
| Full-arch | One arch, all teeth | Whole-mouth topical application | I (Rule 2(2)) | I (872.6870, KMT) |
| Dual-arch | Upper and lower arches in one piece | Simultaneous application | I (Rule 2(2)) | I (872.6870, KMT) |
| Sectional or quadrant | A limited area | Targeted application | I (Rule 2(2)) | I (872.6870 range) |
Two ordering details follow from the labelling rather than from the class. The first is the size range a practice keeps, because a tray that is too small for a full arch will not seat over the teeth and the contact time becomes meaningless. The second is whether the tray line the practice buys is offered sterile, since that single word changes which US quality-system exemption applies to the manufacturer, and a distributor's answer about availability will be different depending on which line is stocked.
What should a practice check before ordering?
Three checks. First, confirm the tray form and the size range, because coverage is the parameter that decides whether the application reaches every tooth. Second, confirm the carton's storage and handling instructions, since the tray is a single-use article that is seated in the mouth and cannot be re-used. Third, confirm which fluoride product the tray is compatible with, because the gel or varnish and the tray are separate regulated articles and the manufacturer's instructions for one may state a contact time that the other assumes.
A dental practice also reorders the operatory consumables that sit at the same chair. Clinics that stock for a whole practice can order through the wholesale programme and request a bulk quote for a standing or annual order; the three-layer dental bibs, 500 pack sits in the same catalogue. Consumables for this line are listed under dental practices. Reselling? become a distributor.
How does the class affect the practice's routine?
The class sets the market-entry path; the routine is set by the maker's instructions and by the practice's own record. A topical fluoride application is charted with the agent used, the concentration, the tray type and size, the contact time, and the date, so the record shows what was applied and for how long. Where a patient reports sensitivity or the agent is inadvertently swallowed, the note also carries the observation and the advice given.
Because the tray is single-use and is seated by the patient, the routine also includes the instruction the patient is given about biting down and about not swallowing. None of that changes with the class; it is the ordinary routine of a preventive appointment, and the record is what shows the tray and the agent were used as their makers intended.
Sources
- openFDA device classification API
- Medical Devices Regulations, SOR/98-282, full text and Schedule 1
- US FDA, medical device databases
- US FDA, overview of device regulation
- Health Canada, medical devices
- Health Canada, establishment licensing
- Royal College of Dental Surgeons of Ontario, standards and guidelines
- Canadian Dental Association
- Public Health Ontario, infection prevention and control
- World Health Organization, oral health
- Standards Council of Canada
- CSA Group
- ISO 13485:2016, medical devices quality management
- ISO 14971:2019, application of risk management to medical devices
- CCOHS, OSH answers
- Health Canada, medical device licence application guidance
A preventive-appointment sheet for the operatory. Agent, concentration, tray form, contact time and the clinician who applied it fit on one page a practice can print and clip to the chart. Open the compliance log centre and take the blank — no account and no sign-up, and the practice can print as many copies as it books appointments.
Print the month, dated. Enter the practice name, the operatory and the preventive list once, and the sterilization log generator lays out dated lines ready for the quality folder.
Ask a compliance specialist. A classification question usually turns on how the device is used, not only on its name. Ask a compliance specialist — you get a written answer specific to your equipment and province, with the regulation or standard it is based on cited.
Related reading
- Prophylaxis paste and fluoride polish in Canada vs the US
- Dental sealants in Canada vs the US
- Plaque disclosing kits in Canada vs the US
CliniEco Medical supplies eye care, laboratory and dental consumables of the kind described in this article. MDEL #35334. This article is written for optometry, laboratory and dental procurement professionals and is not legal advice; the class of a device and the records a practice keeps belong to the manufacturer and to the requirements that apply to it.
Frequently Asked Questions
What class is a disposable fluoride tray in the United States?
Class I, under 21 CFR 872.6870, disposable fluoride tray, product code KMT, exempt from premarket notification subject to the limits of section 872.9.
What class is it in Canada?
Class I. Rule 2(2) of Schedule 1 places a device intended to be placed in the oral cavity as far as the pharynx at Class I, and the non-invasive default in Rule 7(1) reaches the same answer.
Does the tray's sterility change the Canadian class?
No. The Canadian class is derived from where the device is placed and what it does. Sterility does not move a fluoride tray between classes.
Why does sterility matter in the United States then?
Because the entry's quality-system carve-out applies only where the tray is not labelled or represented as sterile. A tray offered as sterile is not covered by that part 820 exemption.
Is a fluoride tray a denture material under the Canadian rules?
No. Rule 3(a) lifts denture materials and orthodontic appliances to Class II; a fluoride tray is neither, so that rule does not reach it.
What else is a disposable fluoride tray called?
It is also written as fluoride foam tray, gel tray, dual-arch tray and fluoride applicator tray; the US regulation describes the same article as a device made of styrofoam intended to apply fluoride topically to the teeth.
0 comments