Quick facts
- United States: a facebow is a named entry of its own at 21 CFR 872.3220 and sits in Class I, filed under a dedicated product code.
- United States: the facebow is named separately from the articulator it works with, so the instrument that records the jaw relationship and the instrument that reproduces it are kept apart in the file.
- Canada: there is no named facebow entry; a facebow is a dental instrument, and Rule 3(b) places all surgical or dental instruments in Class I.
- Canada: the same rule covers every dental instrument, from a mirror to a facebow, so the class does not change when the instrument changes.
- Both countries: the facebow is a semi-critical or non-critical instrument depending on contact, so its reprocessing follows the practice's instrument protocol rather than a device-specific rule.
- Canada: the regulation text cited here is current to 2026-09-21 and was last amended on 2026-06-17.
A facebow frame looks the same in both countries, but the two systems behind it file it differently. One gives the instrument an entry of its own; the other gathers every dental instrument into a single rule. For a laboratory or practice buyer, that split decides what the purchase file cites and what a records review reads when the instrument is checked.
What is a dental facebow?
It is an instrument that records the relationship between the upper jaw and the hinge axis of the jaw joint, so that a cast can be mounted on an articulator in the same relationship the patient has.
The facebow is used in the dental laboratory and at the chair. A bite fork is placed against the upper teeth, a frame carries the fork forward to two ear pieces that sit at the condyles, and the assembly is locked so the position can be transferred to an articulator. Without the transfer, a crown or a denture is built on a cast that has no defined relationship to the patient's joint, and the fit is left to chance.
That role is why the facebow is a device rather than a tool: it carries a measurement from the patient to the model, and the measurement has to be recorded. The instrument is handled in the practice and the laboratory rather than entering the patient, which is what shapes its reprocessing.
| Item | Canada | United States |
|---|---|---|
| How the facebow is described | By rule, as a dental instrument | A named entry at 21 CFR 872.3220 |
| Class the instrument lands in | Class I under Rule 3(b) | Class I |
| What a filing cites | The instrument rule | The device entry and product code |
| What changes the class | Nothing inside the instrument rule | A change that leaves the entry |
What does the American facebow entry cover?
It names the facebow and fixes the class, and it keeps the facebow apart from the articulator.
21 CFR 872.3220 carries the title "Facebow" and places the instrument in Class I under a product code of its own. The entry is separate from the entry for the articulator the facebow is mounted to, so the two instruments are filed against two entries even though they are used as a pair in the laboratory.
What this means for a buyer is that the American file changes when the instrument changes, even where the class does not. A practice that replaces one facebow with another is filing against the same entry; a practice that adds a different transfer instrument is filing against whatever entry describes that instrument.
How do Canada and the United States classify a dental facebow?
It reaches Class I through the instrument rule, and the rule does not distinguish one dental instrument from another.
Rule 3(b) places all surgical or dental instruments in Class I. A facebow is a dental instrument, so it is covered by that rule together with every mirror, probe, explorer and matrix band in the practice. The rule does not name the facebow and does not separate the instrument from any other, which is the point of the wording.
The consequence is that a Canadian buyer cannot look the facebow up by name and read off a class. The class comes from a single rule that covers a whole category, and the record that matters is the instrument's reprocessing instruction rather than a device-specific classification. The scope of the quality-system standards that sit behind instrument handling is carried in ISO 13485:2016.
Do the United States and Canada file a facebow the same way?
They reach the same class by different routes. The American route names the facebow and gives it an entry; the Canadian route gathers it into one rule with every other dental instrument.
That difference shows up in what the file carries. An American file can cite an entry that is specific to the facebow, while a Canadian file cites the instrument rule for the whole category. The class is the same; the evidence is not.
The practical consequence is that a practice buying for two sites keeps one instrument record in the United States and a category record in Canada, and the two are not interchangeable on an audit trail. A buyer who copies the American citation onto a Canadian file has cited an entry that does not exist in the Canadian schedule.
A further difference is what an instrument change touches. In the United States a facebow that is redesigned so that it no longer matches the entry is assessed against a different entry, so the instrument and the file move together. In Canada the instrument stays inside Rule 3(b) whatever its design, because the rule is written for the category rather than for the instrument. That is why a Canadian record reads the same for two different facebows while an American record can change entry between them, and why a practice that buys across both countries keeps one category record for Canada and an instrument-specific record for the United States.
What goes on the record for a facebow?
The instrument, its reprocessing, and the transfer it was used for, because a facebow exists to carry a measurement and a measurement without a record cannot be repeated.
| Facebow part | Function | US entry | Canadian basis |
|---|---|---|---|
| Bite fork | Contacts the upper teeth | 21 CFR 872.3220 | Rule 3(b), dental instrument |
| Facebow frame | Carries the fork to the ear pieces | 21 CFR 872.3220 | Rule 3(b), dental instrument |
| Ear pieces and nasion relator | Locate the hinge axis | 21 CFR 872.3220 | Rule 3(b), dental instrument |
| Articulator mount | Holds the cast in the recorded relationship | Separate instrument entry | Rule 3(b), dental instrument |
A record that names the instrument, the reprocessing step, the operator and the date is enough for a practice review, because the facebow is handled rather than implanted. A transfer record that names the two instruments used together is what makes a laboratory case repeatable when a remake is ordered.
The transfer record is also where the two countries meet in practice. A case that is mounted in one country and finished in another carries two instrument references, one to an American entry and one to the Canadian instrument rule, and the record is the only place those two references sit together. A practice that keeps the transfer, the articulator and the date on one sheet can answer a remake request without reopening the case.
Which consumables does a dental laboratory bench restock?
A laboratory bench runs on the impression and barrier lines that sit beside the mounting instruments. The 3-layer paper and PE dental bibs cover the patient barrier, and the 2 medium cotton rolls keep the field dry while a transfer is taken. 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 872.3220, facebow
- 21 CFR 872.3165, precision attachment
- 21 CFR 872.3275, dental cement
- 21 CFR 872.4565, dental hand instrument
- 21 CFR 872.3200, resin tooth bonding agent
- 21 CFR 872.3400, denture adhesive
- Medical Devices Regulations, SOR/98-282
- ISO 13485:2016, medical device quality management
- ISO 14971:2019, risk management of medical devices
- ISO 4049:2019, polymer-based restorative materials
- ISO 6872:2015, dental ceramic
- 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 laboratory bench whose instrument record is missing is the same bench that cannot repeat a case. The downloadable facebow transfer log is a free sheet with columns for the instrument, the transfer, the operator and the date, so a mounting record is written down rather than remembered. The transfer log generator built for a dental laboratory sizes the sheet to the number of benches a laboratory runs. No account and no sign-up are needed to open either one.
Where the class of an instrument 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 Impression Materials in Canada vs the US: Which Class
- Dental Crown Materials in Canada vs the US: Which Material and Class
- Dental Handpieces in Canada vs the US: Which Reprocessing 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 an instrument and the records kept by a practice belong to the practice and to the requirements that apply to it.
Frequently Asked Questions
Is a dental facebow a Class I device in the United States?
Yes. A device matching the facebow entry at 21 CFR 872.3220 is in Class I, filed under a product code of its own.
Does Canada have a named entry for a dental facebow?
No. The Canadian schedule names no facebow. A facebow is a dental instrument, and Rule 3(b) places all surgical or dental instruments in Class I.
Why are the facebow and the articulator filed separately in the United States?
They are two instruments with two entries. The facebow records the jaw relationship and the articulator reproduces it, so the file cites the entry that describes each instrument.
Does the Canadian class change when the instrument changes?
No. Rule 3(b) covers every surgical or dental instrument in one rule, so a mirror and a facebow are in the same class and read from the same rule.
Does a facebow need to be sterilised between patients?
A facebow is handled rather than implanted, so its reprocessing follows the practice's instrument protocol for the level of contact. The instruction that comes with the instrument and the practice's own procedure are what the record should follow.
What should a transfer record carry?
The instrument used, the transfer made, the operator and the date, along with the articulator the cast was mounted to. Naming both instruments in the record is what makes a laboratory case repeatable on a remake.
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