Quick facts
- The prophylaxis cup is a Class I device in the United States under 21 CFR 872.6290, product code EHK, and a prophylaxis kit is listed separately as 872.4565, product code NYC (read from the openFDA API on 2026-10-20).
- ISO 11609:2017 sets requirements, test methods and marking for dentifrices - but it is written for toothpastes, which is exactly why a prophy paste needs its own specification and its own instruction for use.
- Grit is the specification that decides the clinical use: a fine paste for a maintenance visit on exposed cementum, a medium paste for routine stain, a coarse paste for heavy stain on enamel that can take it.
- Fluoride content is a second decision, not a default: a patient on a high-fluoride regimen, a child, or a patient with a known sensitivity needs a paste chosen for them rather than the tub that happens to be open.
- The cup is single-patient. A cup that is reused, or a tub that is dipped into with a used cup, converts a polishing appointment into a cross-contamination event.
- Pages were read on 2026-10-20; the ISO catalogue entry, the CDHO standards page and the ADA oral health topics page returned 200.
Prophy paste is bought in tubs, used in grams and specified in a sentence that most practices never write down. That sentence - which grit, with or without fluoride, in which cup - is the difference between a polishing appointment that removes stain and one that removes cementum, and it is also the difference between a stock line that is controlled and a cupboard of half-used tubs. This article sets out how to specify the paste and the cup for a Canadian hygiene team, what the standards do and do not cover, and how to keep the stock and the record in step. The cotton rolls used to keep the field dry are the Aurelia cotton rolls, and the gloves used at the chair are the 
CliniEco nitrile examination gloves.
What does grit actually mean in a prophy paste?
Grit describes the abrasive particle size and the hardness of the particles in the paste, and it is the property that decides how much tooth structure the polishing step can remove. Manufacturers label pastes as fine, medium or coarse, and the label is the specification a buyer should hold them to.
The clinical logic is straightforward. A patient with exposed root surfaces or cementum needs the least abrasive paste that will do the job, because cementum is softer than enamel and does not grow back. A patient with heavy extrinsic stain on enamel can take a more abrasive paste for a single visit. A routine maintenance appointment usually sits in the middle.
The abrasivity of a dental product is often discussed in terms of an abrasivity value measured against a reference material, and the value is a laboratory measure rather than a clinical prediction. What matters for purchasing is that the paste is labelled with a grit and that the practice has decided which grit belongs to which appointment type.
| Paste type | Where it fits | Where it does not | What the buyer checks |
|---|---|---|---|
| Fine grit | Maintenance visits, exposed cementum, orthodontic patients, frequent recalls | Heavy stain that needs a more abrasive pass | Particle size claim, fluoride content, tub size |
| Medium grit | Routine stain removal on enamel, most adult recalls | Exposed root surfaces, patients with sensitivity | Grit label, flavour range, tub size |
| Coarse grit | Heavy extrinsic stain on enamel, before a restorative appointment | Cementum, children, patients with recession | Grit label, intended-use statement |
| Fluoride-free | Patients on a separate high-fluoride regimen, some children | Patients who need the fluoride from the paste | Fluoride declaration, flavour |
| Fluoride-containing | Most adult recalls where caries risk justifies it | Patients whose total fluoride intake is already high | Fluoride compound and concentration on the label |
Does ISO 11609 cover prophy paste?
ISO 11609:2017 sets requirements for the physical and chemical properties of dentifrices, provides test methods and specifies marking and labelling. It is the standard behind a tube of toothpaste, and it is often quoted in a prophy paste specification by suppliers who want the authority of a standard number.
The important qualification is that a professional prophylaxis paste is not a consumer dentifrice. It is used by a trained operator, at a different frequency, with a different delivery, and the standard's scope is dentifrices. That does not make the standard irrelevant - it makes it a starting point rather than a complete specification.
The practical consequence for a buyer is that the instruction for use and the label carry more weight than a standard reference. The paste should state its grit, its fluoride content, its intended use and its shelf life, and a supplier who cannot state those four things is a supplier to leave alone.
Why is the cup part of the specification?
The prophylaxis cup is the interface between the paste and the tooth, and it is a classified device in its own right: product code EHK under 21 CFR 872.6290, Class I. A prophylaxis kit is listed separately at 21 CFR 872.4565, product code NYC, which is a reminder that the kit and the cup are not the same purchase.
Cup design affects the polish as much as the paste does. A firm cup with a good flare reaches the gingival third without traumatising the margin; a soft cup collapses and skips; a worn cup polishes nothing. The cup also has to fit the handpiece, and a cup that does not seat fully will wobble and spray paste.
The single-patient rule is not negotiable. A cup is used on one patient and discarded, and paste is dispensed from the tub with a clean instrument or from a single-use portion. A tub that has been dipped into with a used cup is a tub that has been inoculated, and no amount of wiping the rim fixes it.
How does fluoride fit into the decision?
Fluoride in a prophy paste is a dose delivered during a procedure, and the decision to use it belongs to the clinician who knows the patient's caries risk and total fluoride exposure. A practice that stocks only a fluoride paste has made that decision for every patient by default.
The stock answer is to hold two lines: a fluoride-containing paste for the patients who need it and a fluoride-free paste for the patients who do not. That is a small amount of shelf space and it turns a clinical decision back into a decision rather than a default.
Topical fluoride products beyond the paste - varnish, gel, foam - are separate decisions with their own indications and their own provincial rules. A paste is not a substitute for a varnish, and a practice that uses paste to avoid stocking varnish has made a procurement decision with clinical consequences.
How do Canada and the United States regulate a prophy cup?
In the United States the cup and the kit are Class I devices, and a fluoride-containing professional product may be regulated as a drug or a device depending on its claims and its route. In Canada, the manufacturer assigns the device class under SOR/98-282, and a fluoride product with a therapeutic claim may need a drug identification number rather than a device licence.
That split is the reason a practice should read the label rather than the catalogue description. A prophy paste described as a polishing agent, a paste described as a caries-prevention product and a varnish described as a coating can arrive under three different regulatory routes, and the paperwork that comes with each is different.
Does a fluoride paste follow the same route in Canada and the United States?
| Item | Canada | United States |
|---|---|---|
| Prophylaxis cup | Class assigned by the manufacturer under SOR/98-282 | Class I, 21 CFR 872.6290, product code EHK |
| Prophylaxis kit | Device or combined product depending on contents and claims | Class I, 21 CFR 872.4565, product code NYC |
| Fluoride-containing paste | Route depends on the claim: device or drug with a DIN | Device or drug depending on the claim |
| Where the practice standard sits | Provincial dental college and CDHO standards for hygiene practice | State dental board rules and ADA guidance |
| Record | Procedure note and product used | Procedure note and product used |
The one sentence to avoid in a policy is "food-grade, so no licence needed". A product used in a mouth during a professional procedure is not exempt because it is also sold as a cosmetic; the claim on the label decides the route.
How should the stock be managed?
Buy the grits the practice actually uses, in tubs sized to the turnover. A large tub of a coarse paste that is used twice a month will outlive its shelf life, and a tub that has been open for a year is a tub whose performance nobody has checked. Two or three sizes are usually enough: a small tub for the occasional grit, a standard tub for the routine one.
Keep the paste and the cups in the operatory but count them monthly. A cup bin that is never counted runs out during a recall week; a paste tub that is never dated is used past its expiry. A monthly count takes five minutes and turns two stock-outs a year into none.
Record the product used in the procedure note, especially when the paste contains fluoride. That line is what lets the practice answer a question about a patient's fluoride exposure months later, and it is the record that a clinical audit will ask for.
A polishing appointment consumes more than paste: cotton rolls keep the field dry and the bib catches what the cup throws, and both are reordered on the same cycle as the tubs. Order through the wholesale programme for case pricing and an account, or become a distributor for resale. The cotton rolls, size 2 medium sits in the same catalogue. The three-layer paper and PE dental bibs sit in the same drawer. Consumables for this line are listed under the department page. Browse the for dental clinics collection for the lines this article covers.
Sources
- openFDA, device classification API (prophylaxis cup and kit, 2026-10-20)
- FDA, device classification database
- 21 CFR 872.6290, prophylaxis cup
- ISO 11609:2017, dentistry, dentifrices, requirements, test methods and marking
- College of Dental Hygienists of Ontario, standards
- Canadian Dental Association
- American Dental Association, oral health topics
- Health Canada, medical devices
- Medical Devices Regulations, SOR/98-282
- RCDSO, infection prevention and control standard
- CDC, dental infection control
- CDC, Guideline for Disinfection and Sterilization in Healthcare Facilities
- ISO 17664-1:2021, processing of health care products
- ISO 13485:2016, medical devices quality management
- Public Health Ontario, infection prevention and control
- Canadian Centre for Occupational Health and Safety, OSH answers
Printable prophy stock and expiry sheet. One page listing each paste by grit and fluoride status, with the date opened, the expiry and the monthly count. Print the prophy stock sheet - it prints on plain paper with no account and no sign-up, and an out-of-date tub shows before it reaches a patient.
Grit selection card for the operatory wall. A one-page card that maps appointment type to grit and fluoride choice, so that the locum and the new hygienist use the same rule as the rest of the team. Print the grit selection card and keep it with the paste rather than in a manual.
Ask a compliance specialist. Whether a fluoride paste needs a drug identification number, what the label must declare and how to record the product used are questions that depend on the product and the province. Ask a compliance specialist - 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 and the US: which rules apply
- Prophylaxis cups in Canada and the US: which rules apply
- Dental hygienist supplies: prophy room consumables for daily work
CliniEco Medical supplies eye care, laboratory and dental consumables of the kind described in this article. MDEL #35334. This article is written for practice managers and is not clinical advice; the paste, the cup and the fluoride product a patient receives are chosen by the treating clinician under the standards of the provincial college.
Frequently Asked Questions
What is the difference between fine, medium and coarse prophy paste?
The grit describes the abrasive particle size and how much tooth structure the polishing step can remove. Fine suits maintenance visits and exposed cementum, medium suits routine stain on enamel, and coarse is for heavy stain on enamel that can take it.
Does ISO 11609 cover prophy paste?
ISO 11609:2017 sets requirements and test methods for dentifrices. A professional prophylaxis paste is used differently from a consumer toothpaste, so the standard is a starting point rather than a complete specification - the label and the instruction for use carry the rest.
Is a prophylaxis cup a regulated device?
Yes. In the United States it is Class I under 21 CFR 872.6290, product code EHK, and a prophylaxis kit is listed separately at 21 CFR 872.4565. In Canada the manufacturer assigns the class under SOR/98-282.
Can a prophylaxis cup be reused between patients?
No. The cup is single-patient and is discarded after use. Paste should be dispensed with a clean instrument or in single-use portions rather than by dipping a used cup into the tub.
Should a practice stock fluoride-free paste?
Yes, if it treats patients whose total fluoride exposure is already high or who are on a separate regimen. Stocking only a fluoride paste makes that clinical decision by default for every patient.
Does a prophy paste need a licence in Canada?
It depends on the claim. The manufacturer assigns a device class under SOR/98-282, while a product with a therapeutic fluoride claim may need a drug identification number. Read the label rather than the catalogue description.
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