Quick facts
- Extraoral orthodontic headgear is worn outside the mouth to exert pressure on the teeth while an inner bow is fastened to the appliance inside the mouth.
- In the United States it files under 21 CFR 872.5500, Extraoral orthodontic headgear, at Class II, product code DZB.
- Canada keeps no named entry, but it does not need one: Rule 3(a) of Schedule 1 places all denture materials and orthodontic appliances, and their accessories, at Class II — despite rules 1 and 2.
- Rule 3(a) overrides both the body-orifice rule and the oral-cavity carve-out, so the class does not turn on how far the inner bow reaches into the mouth.
- Rule 3(b), which places surgical and dental instruments at Class I, does not apply: headgear is an appliance, and its straps, bows and elastics are accessory components that travel with the appliance.
- 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.
Extraoral orthodontic headgear is the appliance that pushes or holds the teeth from outside the mouth. A strap passes around the head or the neck, an inner bow clips into the appliance on the teeth, and the force is applied to the dentition through a pathway that leaves the mouth. Because part of the appliance is worn on the face and part sits inside the mouth, it is one of the devices most often mis-read as an external article. The United States names it at Class II; Canada reaches the same class through the rule that covers every orthodontic appliance. This article sets out both routes and the safety and record points a practice should not lose, with the three-layer dental bibs used at the same chair.
What is extraoral orthodontic headgear?
It is a device intended for use with an orthodontic appliance to exert pressure on the teeth from outside the mouth. It has a strap that wraps around the patient's neck or head and an inner bow portion that is fastened to the orthodontic appliance inside the mouth. Depending on the design, the force is applied to restrain forward growth, to reinforce anchorage, or to move teeth in a direction an intraoral appliance cannot reach on its own.
The appliance is therefore an assembly rather than a single object: a facebow, a strap, a force module or elastic and, on a modern design, a safety release that is meant to give way before the assembly can be pulled against the face. The parts are supplied and replaced separately, which is why the class question a practice asks is really a question about a component group rather than about one part.
Is extraoral orthodontic headgear a Class II device in the United States?
Yes. 21 CFR 872.5500 is titled Extraoral orthodontic headgear and the identification reads: \"An extraoral orthodontic headgear is a device intended for use with an orthodontic appliance to exert pressure on the teeth from outside the mouth. The headgear has a strap intended to wrap around the patient's neck or head and an inner bow portion intended to be fastened to the orthodontic appliance in the patient's mouth.\" The entry sits at Class II.
The openFDA device classification API lists product code DZB (Headgear, extraoral, orthodontic) under that regulation number. The entry is written around the force the appliance applies rather than around the way it is held, which is why a facebow and strap system and a cervical-pull or high-pull variant all sit inside the one number.
| Item | Detail |
|---|---|
| US regulation | 21 CFR 872.5500 - Extraoral orthodontic headgear |
| US class | Class II |
| Product code | DZB (headgear, extraoral, orthodontic) |
| Route to market | Premarket notification before commercial distribution |
| Stated intended use | To exert pressure on the teeth from outside the mouth, with an inner bow fastened to the appliance inside the mouth |
| Applied part | Strap on the head or neck; bow inside the mouth |
How does Canada classify extraoral orthodontic headgear?
Canada keeps no named entry for the appliance, but the answer is written into a rule that leaves no room for argument. Rule 3(a) of Schedule 1 of the Medical Devices Regulations opens with the words despite rules 1 and 2 and continues: \"(a) all denture materials and orthodontic appliances, and their accessories, are classified as Class II.\" Headgear is an orthodontic appliance, its strap, bow and elastics are its accessories, and the class is Class II.
Reading the rule in order explains why the usual routes are set aside. Rule 2(1) would take a device that penetrates a body orifice to Class II and Rule 2(2) would take a device placed in the oral cavity as far as the pharynx back down to Class I; for an orthodontic appliance those two subrules are displaced by Rule 3(a), so the class does not depend on how far the inner bow reaches into the mouth. Rule 3(b), which places surgical and dental instruments at Class I, does not apply either: headgear exerts a controlled force on the dentition and is an appliance rather than an instrument, which is the same distinction that keeps brackets and bands in the appliance family.
| Item | Canada | United States |
|---|---|---|
| Named entry | None; classified by rule | 872.5500 - Extraoral orthodontic headgear |
| Class | Class II (Rule 3(a)) | Class II |
| Governing text | Schedule 1, Part 1, Rule 3(a) | 21 CFR 872.5500 |
| Does the rule depend on the material? | No; Rule 3(a) covers all orthodontic appliances and their accessories | Handled inside the Class II entry |
| Would Rule 2(2) apply instead? | No; Rule 3(a) applies despite rules 1 and 2 | Not applicable |
Do the components of headgear share one class?
In Canada they do, because Rule 3(a) reaches the appliance and its accessories together. In the United States the appliance sits in one entry and the elastomeric force modules a practice reorders are ordinary consumables of the appliance line. The practical effect is the same: a practice that buys a facebow, a strap and a bag of elastics is stocking one appliance family, not three regulated articles.
| Component | What it does | Part of the appliance? | Class, Canada | Class, US |
|---|---|---|---|---|
| Facebow and inner bow | Transmits force from the strap to the intraoral appliance | Yes, a component | II (Rule 3(a)) | II (872.5500) |
| Strap (cervical or head) | Anchors the appliance outside the mouth | Yes, an accessory | II (Rule 3(a)) | II (872.5500) |
| Elastic or force module | Sets the force the appliance applies | Yes, an accessory | II (Rule 3(a)) | II (872.5500) |
| Safety release | Releases the assembly before it can be pulled against the face | Yes, a component | II (Rule 3(a)) | Within the Class II entry |
Two points sit outside the class and belong in every practice's routine anyway. The first is the safety release, which is the part that protects the patient from an eye injury if the appliance is pulled or caught; the manufacturer's instructions for wearing, removing and storing the assembly exist for that reason, and the patient instruction should follow them rather than the practice's habit. The second is wear time, because headgear only works while it is worn, and the hours are the part of the treatment the patient controls.
What should a practice check before ordering?
Four checks. First, confirm the pull direction and the force range the appliance is designed for, because a cervical-pull and a high-pull design load the dentition differently. Second, confirm the interface between the inner bow and the intraoral appliance, since a bow that does not seat in the tube the practice uses will be returned rather than fitted. Third, confirm that a safety release is part of the assembly and that the maker's instructions describe its use. Fourth, confirm the sizes and the replacement interval for the elastic or force module, because that consumable is what sets the force and it is reordered far more often than the frame.
An orthodontic practice also reorders the room 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 an orthodontic practice?
The class sets the market-entry path; the record is set by the treatment. A headgear case is recorded with the appliance and the pull direction, the force prescribed, the wear schedule given to the patient, the instruction on the safety release, and the reviews at which the fitting of the bow and the condition of the strap were checked. Where a patient reports discomfort or the appliance has been damaged, the note carries what was found and what was replaced.
Because the appliance is worn at home and removed by the patient, the routine also includes the handling and cleaning instructions the maker states and the storage the patient is told to use. None of that changes with the class; it is the ordinary routine of an orthodontic practice, and the record is what shows the appliance was fitted and maintained as the maker 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 headgear case sheet for the chair. Pull direction, prescribed force, wear hours and the safety-release instruction belong on one page that goes home with the patient and stays in the chart. Open the compliance log centre for the blank — no account and no sign-up, and the practice prints as many copies as it starts cases.
Dated case lines, laid out for you. Type the practice name, the clinician and the case list once, and the sterilization log generator returns a dated sheet ready to print or file.
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
- Orthodontic brackets in Canada vs the US
- Orthodontic bands in Canada vs the US
- Clear aligners 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 extraoral orthodontic headgear in the United States?
Class II, under 21 CFR 872.5500, extraoral orthodontic headgear, product code DZB.
What class is it in Canada?
Class II, through Rule 3(a) of Schedule 1 of the Medical Devices Regulations, which places all denture materials and orthodontic appliances, and their accessories, at Class II.
Why does the rule ignore how far the bow reaches into the mouth?
Because Rule 3(a) applies despite rules 1 and 2. Those subrules would otherwise place a device that enters a body orifice at Class II and a device in the oral cavity at Class I; the orthodontic rule displaces both.
Is headgear classified as a dental instrument instead?
No. Rule 3(b) places surgical and dental instruments at Class I. Headgear applies a controlled force to the dentition and is an appliance, so Rule 3(a) governs it.
Do the straps and elastics have their own class?
In Canada they are accessories of the appliance and are covered by Rule 3(a); in the United States they sit within the Class II entry. They are not separate regulated articles.
What else is extraoral orthodontic headgear called?
It is also written as facebow headgear, cervical pull headgear, high pull headgear and extraoral traction appliance; the US regulation describes the same article as a device with a strap around the neck or head and an inner bow fastened to the appliance in the mouth.
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