Quick facts
- United States: a resin tooth bonding agent is a named entry at 21 CFR 872.3200 and sits in Class II, filed under a product code for the resin agent.
- United States: the entry names the agent by material — resin — so a bonding agent built on a different chemistry is assessed against whatever entry describes that material.
- Canada: the schedule names no bonding agent, and the definition of "dental material" was repealed in 2002, so the product is reached from a rule rather than from a name.
- Canada: Rule 3(a) names only denture materials and orthodontic appliances, with their accessories, and places them in Class II — a bonding agent is neither.
- Canada: a bonding agent that is neither is reached from the rule that matches its contact, and the non-invasive catch-all places other non-invasive devices in Class I.
- Canada: the regulation text cited here is current to 2026-09-21 and was last amended on 2026-06-17.
A bonding agent syringe looks the same in both countries, but the two systems behind it do not file it the same way. One names the agent and fixes a class to the material; the other names no agent at all and reaches a class from a rule. For a dental buyer, that split decides what the order cites and what happens when one agent is substituted for another.
What is a resin tooth bonding agent?
It is the material that bonds a resin restoration to the tooth surface, and it exists to make the junction between the tooth and the restoration hold.
The agent is applied after the enamel and dentine have been prepared, and it forms the layer that a composite is then built onto. Its job is a mechanical and chemical join, which is why the technique around it — isolation, etch, primer, bond — matters as much as the syringe. The material is used at the chair and does not enter the body, which is what shapes how both systems describe it.
That role is what the two systems treat differently. One names the agent by its material and fixes a class; the other treats it as a non-invasive material and reaches a class from a rule.
| Item | Canada | United States |
|---|---|---|
| How the agent is described | No named entry | A named entry at 21 CFR 872.3200 |
| Class the agent lands in | Reached from the rule matching contact | Class II |
| What a filing cites | The rule and the contact | The device entry and product code |
| What changes the class | A change in the rule the product is read against | A change of material that leaves the entry |
What does the American bonding agent entry cover?
It names the resin agent and fixes the class, and it ties the entry to the material rather than to the technique.
21 CFR 872.3200 carries the title "Resin tooth bonding agent" and places the device in Class II under a product code for the resin agent. The entry is built around the material, so a bonding agent described as a resin is inside it, while an agent built on another chemistry is assessed against whatever entry describes that material.
What this means for a buyer is that "it is a bonding agent" does not by itself settle the American class; the material in the entry is what does. A substitute that changes the chemistry can move the product to a different entry, which is a filing change even where the clinical technique is unchanged.
| Material | US entry | US code | US class | Canadian basis | Canadian class |
|---|---|---|---|---|---|
| Resin tooth bonding agent | 21 CFR 872.3200 | KLE | Class II | Rule matching contact | Reached from contact |
| Cavity varnish | 21 CFR 872.3260 | Varies with chemistry | Set by the section | Rule matching contact | Reached from contact |
| Calcium hydroxide cavity liner | 21 CFR 872.3250 | EJK | Class II | Rule matching contact | Reached from contact |
| Dental cement | 21 CFR 872.3275 | EMB or EMA | Class I or II | Rule matching contact | Reached from contact |
How do Canada and the United States classify a bonding agent?
It reaches a class from the rules, because there is no bonding agent entry and no "dental material" definition left to look the product up under.
The classification schedule attached to the Medical Devices Regulations, SOR/98-282 names very few dental products. Rule 3(a) names two categories of dental material — denture materials and orthodontic appliances, with their accessories — and places them in Class II. A bonding agent is neither a denture material nor an orthodontic appliance, so Rule 3(a) does not reach it.
The definition that would have caught the product was removed. The regulations once defined "dental material" in the interpretation section, and that definition was repealed in 2002, so the term is no longer available as a lookup. A bonding agent is therefore read against the rules that describe its contact, and the non-invasive catch-all places other non-invasive devices in Class I unless another rule pulls the device higher.
Do Canada and the United States reach the same class for a bonding agent?
They can reach the same class by different routes, and they can also disagree. The American class is fixed to the resin entry; the Canadian class is reached from the rule that matches the product's contact and use.
That difference shows up in what the file carries. An American file can cite an entry that names the agent and its material, while a Canadian file cites the rule the product is read against. The class is a statement about the entry on one side and about the contact on the other.
The practical consequence is that the intended contact and the intended use have to be written on the order. A bonding agent used at the chair and a material used in the laboratory are not the same classification premise in Canada, and the field that records the contact is what the class is read from.
A second difference is the reference a buyer can hold beside the file. The American entry names the material — resin — so a labelling or claim change that keeps the material is read inside the same entry. The Canadian side has no material entry at all, so the reference beside the file is the material standard and the rule the product is read against. A buyer who keeps ISO 4049:2019 on the order and the rule on the record has a reference that survives a supplier change and a border crossing.
What does the standard for polymer-based materials cover?
It covers the material itself, and it is the reference a buyer can hold beside the classification.
The international standard for polymer-based restorative materials, ISO 4049:2019, sets out requirements for the polymer materials used to restore teeth, including the resin systems that bonding agents are built on. It is a material standard rather than a classification, which means it tells a buyer what the material must do and leaves the class question to the regulations.
The practical use of the standard is on the order and on the stock sheet. A practice that names the material standard beside the product record has a reference that survives a supplier change, because the standard describes the material rather than a trade name. The classification then sits beside it, reached from the rule in Canada and from the entry in the United States.
Which consumables does a bonding appointment restock?
A bonding appointment runs on the isolation and barrier lines that keep the field dry. The 3-layer paper and PE dental bibs cover the patient barrier, and the 2 medium cotton rolls hold the field while the agent is placed. A practice that also runs its own steriliser pairs the sterilization monitoring collection with the biological indicator 5-pack trial. For clinics and multi-site groups buying at case level, the wholesale ordering page sets out account and case terms, and the B2B wholesale collection lists the lines held for institutional buyers. Reselling? become a distributor.
Sources
- 21 CFR 872.3200, resin tooth bonding agent
- 21 CFR 872.3250, calcium hydroxide cavity liner
- 21 CFR 872.3260, cavity varnish
- 21 CFR 872.3275, dental cement
- 21 CFR 872.3220, facebow
- 21 CFR 872.4565, dental hand instrument
- Medical Devices Regulations, SOR/98-282
- ISO 4049:2019, polymer-based restorative materials
- ISO 6872:2015, dental ceramic
- ISO 13485:2016, medical device quality management
- ISO 14971:2019, risk management of medical devices
- openFDA device classification API
- Canadian Dental Association
- Royal College of Dental Surgeons of Ontario
- Ad Standards, non-prescription and cosmetic guidelines
- CCOHS, OSH answers
- Public Health Ontario, laboratory services test index
- CLSI, clinical and laboratory standards
- ISO 15189:2022, medical laboratories
- IEC 61010-1:2010, safety of electrical measuring equipment
A bonding tray whose record is missing is the same tray that gets a substitution question. The printable bonding and isolation log is a free sheet with columns for the product, the material standard, the lot, the opening date and the date, so a material record is written down rather than remembered. The isolation log generator built for a bonding appointment sizes the sheet to the number of chairs a practice runs. No account and no sign-up are needed to open either one.
Where the class of a bonding agent and the rule behind it need to be set out for a review, a written answer is worth more than a general one. Ask a compliance specialist and a written answer comes back specific to your equipment and province, with the regulation or standard it is based on cited.
Related reading
- Dental Amalgam in Canada vs the US: Which Class
- Dental Crown Materials in Canada vs the US: Which Material and Class
- Orthodontic Supplies in Canada vs the US: Which Device Rules
CliniEco Medical supplies laboratory, eye care and dental consumables of the kind described in this article. MDEL #35334. This article is written for optometry, laboratory and procurement professionals and is not legal advice; the class of a material and the records kept by a practice belong to the practice and to the requirements that apply to it.
Frequently Asked Questions
Is a resin tooth bonding agent a Class II device in the United States?
Yes. A device matching the entry at 21 CFR 872.3200 is in Class II, and the entry is built around the resin material rather than around the technique.
Does Canada have a named entry for a bonding agent?
No. The schedule names no bonding agent, and the definition of "dental material" was repealed in 2002, so there is no definition to look the product up under.
What does Rule 3(a) cover in Canada?
Rule 3(a) names denture materials and orthodontic appliances, and their accessories, and places them in Class II. A bonding agent is neither, so the rule does not reach it.
How is the class reached in Canada if no bonding agent is named?
It is reached from the rule that matches the product's contact. The non-invasive catch-all places other non-invasive devices in Class I unless another rule pulls the device higher.
Which standard covers the material itself?
ISO 4049:2019 sets out requirements for polymer-based restorative materials, including the resin systems that bonding agents are built on. It is a material standard rather than a classification.
Why does the material matter to the American file?
The American entry names the resin material, so a bonding agent built on a different chemistry is assessed against whatever entry describes that material. A change of material can be a change of entry.
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