Quick facts
- A dental amalgamator is a named Class I device in the United States at 21 CFR 872.3100.
- Canada names no amalgamator. A powered mixer is an active device that neither treats nor diagnoses, so Rule 12 of the Medical Devices Regulations places it in Class I.
- The class is the same on both sides; the route is not — the United States sorts by named entry and product code, Canada by the energy source and the purpose.
- A capsule mixer that also heats or cures the material is a different device with its own entry and its own rule.
- Amalgam capsules are the material, not the mixer, and they follow the material's route rather than the mixer's.
- The regulation text quoted here is current to 2026-09-21 and was last amended on 2026-06-17.
A dental amalgamator is the benchtop unit that shakes a capsule to mix alloy and mercury, or to mix a resin, into a workable material. It is a small powered device with a timer, and both countries place it in Class I. What differs is the reason each rulebook gives, and that reason matters when a supplier documents the unit for a market.
What is a dental amalgamator?
It is a powered mixer that holds a capsule and shakes it for a set time at a set speed. The clinician selects an amplitude and a mixing time, closes the lid, and the unit mixes the contents into a homogenous material that is then placed in the tooth. Some units mix amalgam; some mix resin; many do both, and some also heat the capsule to set a specific working consistency.
The unit is active, because it depends on a source of energy to operate. It does not administer or withdraw energy to or from the body, and it does not supply information for diagnosis. Those two facts decide its class in Canada, and they are why a device with a motor can still be Class I.
How do Canada and the United States classify a dental amalgamator?
The unit lands in Class I on both sides of the border, but through two different doors.
| Item | Canada | United States |
|---|---|---|
| Dental amalgamator | Class I by Rule 12 | Class I, 21 CFR 872.3100 |
| Basis named in the rulebook | Rule and intended use | Device entry and product code (EFD) |
| What decides the class | Energy source and purpose | Which named entry it is filed under |
| Mixer that also heats the capsule | Class follows the added function | Separate entry or accessory |
| Amalgam capsule | Material route, separate from the mixer | Material entry, separate from the mixer |
In the United States a dental amalgamator is a named entry at 21 CFR 872.3100, and a product filed under that entry is Class I. In Canada no entry names an amalgamator. The Regulations first ask whether the device is invasive; a mixer never touches the patient, so the invasive rules do not reach it. They then ask whether it is active; a mixer depends on a source of energy, so it is an active device. Rule 12 states that any other active device is classified as Class I, and because a mixer neither treats nor diagnoses, the catch-all applies and the class is I.
Which documents differ between Canada and the United States for a mixer?
The class is identical, which is why the reference a supplier cites is the only thing that changes.
In the United States the named Class I entry carries the design and labelling controls that entry sets out, and a supplier works from the entry number and product code. In Canada the mixer is a Class I medical device under Rule 12, subject to the establishment and record requirements the Regulations set for that class, with the labelling rules applied. The difference is not the class number; it is the citation a supplier gives when a dental buyer or an inspector asks why the unit is Class I at all.
That is why two amalgamators that look the same can arrive with two different file references. One file cites a US entry and a product code; the other cites Rule 12 and an intended use. Both are correct, and each is correct only in its own country.
Why does a powered mixer stay Class I in Canada?
Because the rulebook asks what the device touches, then whether it is active, then what the activity does.
The mixer does not penetrate the body, does not touch the surface of the eye and does not enter a body orifice, so the invasive rules do not reach it. It is not intended to contact injured skin, so Rule 4 does not apply. It does not channel or store substances into the body, so Rule 5 does not apply. It does not modify the biological or chemical composition of blood or body fluids for reintroduction into the body, so Rule 6 does not apply. It is an active device, so it is not caught by the non-invasive rules either; instead Rule 12 catches it and classes any other active device as Class I.
The one distinction a supplier has to keep straight is between the mixer and the material. A capsule that contains the alloy and the mercury is a dental material, and a resin capsule is a restorative material; neither is the mixer, and each follows its own route. A unit that adds heating changes its function, and the class then depends on what the added function does rather than on the shaking.
There is also a boundary to keep against the dental instrument rule. A manual mixing instrument — a spatula or a slab used to mix material by hand — is a dental instrument, and Rule 3(b) classes all surgical or dental instruments as Class I. A powered mixer is not an instrument of that kind; it is an active device, so Rule 12 catches it instead. The two routes reach the same class, but a supplier citing the wrong one has described the device as something it is not.
Which consumables does a restorative bay restock?
A bay that mixes and places material runs on the same items every day. The three-layer paper and PE dental bibs cover the patient, and the #2 medium cotton rolls control moisture while a filling is placed. Where the clinic monitors its own steriliser, the sterilization monitoring collection pairs with the 24-hour monitoring five-pack trial. Clinics and multi-site groups ordering at case level use the wholesale ordering page, and the B2B wholesale collection lists the lines held for institutional buyers. Reselling? become a distributor.
What do the two rulebooks actually say?
The two texts are short, and reading them side by side shows why a motor does not raise the class.
| Rule or entry | Verbatim wording | Effect on a dental amalgamator |
|---|---|---|
| Rule 12, Canada | Any other active device is classified as Class I | The mixer neither treats nor diagnoses, so Class I |
| Rule 10(1), Canada | supplies energy for the purpose of imaging or monitoring physiological processes | Does not apply, because the mixer does not diagnose |
| Rule 9(1), Canada | administer or withdraw energy to or from the body | Does not apply, because the mixer does not treat |
| 21 CFR 872.3100, US | Amalgamator, dental, ac-powered | Named Class I entry |
| Rule 3(b), Canada | all surgical or dental instruments are classified as Class I | Would apply to a manual mixing instrument |
Read together, the lines give a supplier a simple sequence. Ask what the device touches, then whether it is active, then what the activity does. A mixer that shakes a capsule and does nothing else stays where Rule 12 puts it, and the US entry is a different way of saying the same thing.
Sources
- 21 CFR 872.3100, dental amalgamator
- 21 CFR 872.4565, dental hand instrument
- 21 CFR 872.6010, abrasive disk, point and wheel
- 21 CFR 872.6030, polishing agent for the oral cavity
- 21 CFR 872.6300, rubber dam
- Medical Devices Regulations, SOR/98-282, full text
- openFDA device classification API
- ISO 13485:2016, medical devices quality management
- ISO 14971:2019, risk management for medical devices
- ISO 4049:2019, dentistry, polymer-based restorative materials
- Royal College of Dental Surgeons of Ontario
- Canadian Dental Association
- Public Health Ontario, laboratory services test index
- CCOHS, OSH answers
- Government of Canada, medical devices guidance
- College of Optometrists of Ontario, standards of practice
- Opto, eye health library
- American Academy of Ophthalmology, eye health
- CLSI, clinical and laboratory standards
- Standards Council of Canada
A mix that is not tied to its capsule lot cannot be reviewed when a restoration fails early. The printable material mixing log is a blank sheet with columns for the date, the material, the capsule lot, the mixing time and the operator, so a repeat failure is traced from the page. The mixing record generator on the same page sizes the sheet to the number of bays a clinic runs. No account and no sign-up are needed to open either one.
Every dental layout is different. Ask a compliance specialist and you will get a written answer 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 Applies?
- Prophylaxis Cups in Canada vs the US: Which Rules Apply?
- Dental Hand Instruments in Canada vs the US: Which Class Applies?
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 procurement professionals and is not legal advice; the class of a device and the records kept by a clinic belong to the manufacturer and to the requirements that apply to it.
Frequently Asked Questions
Is a dental amalgamator a Class I device in the United States?
Yes. A dental amalgamator is a named Class I entry at 21 CFR 872.3100, filed under product code EFD.
How does Canada classify the same mixer?
Canada names no amalgamator. It is an active device that neither treats nor diagnoses, so Rule 12 classes any other active device as Class I.
Why does a motor not raise the class?
Because Rule 9 applies to a device that administers or withdraws energy to or from the body, and Rule 10 applies to a device that images or monitors a physiological process. A mixer that shakes a capsule does neither.
Is an amalgam capsule part of the mixer?
No. The capsule is the material, and it follows the material's route. The mixer is the unit that shakes it, and the two are filed separately.
Does a heated amalgamator change class?
A unit that adds heating changes its function, so the class depends on what the added function does. A plain mixer stays Class I.
What does the class change for a supplier?
The class is the same, but the reference is not. A US supplier cites a named entry and product code; a Canadian file cites Rule 12 and an intended use.
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