A complete veterinary dental X-ray setup has three parts: a generator that makes the beam, an image capture system (a DR sensor or CR plates), and software that gets the image on screen and into the record. Each part has its own trade-offs, and the right combination depends on your space, your caseload, and your province’s rules.
This guide walks through each part the way I’d want a colleague to walk me through it before I signed a quote.
Why radiographs belong in every dental
If you’ve ever finished a cleaning, looked at the gumline, and wondered what was still hiding underneath, you already know why this matters. The numbers back that instinct up.
AAHA’s 2019 dental care guidelines report that about 28% of grossly normal teeth in dogs, and about 42% in cats, had clinically important findings on radiographs. The Guidelines Task Force strongly recommends full-mouth intraoral dental radiographs in all dental patients, and says that at a minimum, pre- and post-extraction radiographs are essential. Without them, the full extent of disease is easily underestimated, which leads to wrong treatment plans and missed painful disease.
There’s a liability side too. A 2015 AVMA professional liability review of jaw fractures and retained tooth roots concluded that complications would be difficult to defend if the veterinarian did not have access to dental radiographs.
So the question for most practices isn’t whether to take dental radiographs. It’s how to make them fast and reliable enough that your team takes them every time.
The three parts of a dental X-ray system
| Part | What it does | Your options |
|---|---|---|
| Generator | Produces the X-ray beam | Wall-mounted or mobile |
| Image capture | Records the image | DR sensor (direct) or CR plates and a reader |
| Software | Displays, stores, and shares the image | Comes with your sensor or reader |
Most practices buy a generator and an image capture system together. If you already own a generator, you may only need the second part.
Part 1: The generator
The generator is the box on the arm. It needs to give you consistent exposures, let you set techniques quickly, and reach every tooth in a dog or cat without a fight.
Wall-mounted. The Dentalaire DC Wall-Mounted is the fixed-room option. It has a graphical interface with a full-size LCD and easy-to-use buttons, plus veterinary-specific selections that include exotic and extremity settings. Those presets matter on a full dental day, because you’re not hand-adjusting exposure for every unusual case.
Mobile. The Dentalaire DC Mobile is a cart-mounted unit with a full-size LCD, pre-programmed techniques or manual kV and time settings, and an all-aluminum positioning arm with a precision braking system. The brake matters more than it sounds like: an arm that drifts mid-exposure costs you a retake and more time under anesthesia.
Two things to check before you choose a mobile unit:
- Hand-held units are not permitted in Canada. The College of Veterinarians of Ontario states that hand-held dental X-ray equipment doesn’t meet the requirements of the Radiation Emitting Devices Regulation. Portable and mobile units are allowed in mobile facilities.
- In a permanent clinic, rules may expect a fixed installation. In Ontario, the Ministry of Labour generally expects portable or mobile X-ray equipment in a permanent clinic to be permanently installed in the treatment room used for dental care, unless you submit plans for approval. Other provinces have their own rules, so confirm yours with your regulator before you buy a cart for a permanent clinic.
If you’re weighing the two generators, it comes down to this: a dedicated dental room points to wall-mounted, and a mobile practice or a shared space points to mobile, subject to the rules above. You can browse both on our veterinary dental X-ray page.
Part 2: Image capture, DR sensor or CR plates
This is the decision that affects your daily workflow the most. There are two ways to capture a digital dental image.
| DR (direct sensor) | CR (plates and a reader) | |
|---|---|---|
| How it works | A sensor sits in the mouth and connects to your computer, so the image appears on screen right away | A reusable plate sits in the mouth, then a reader scans it |
| Speed | Seconds | A little longer, because of the scan |
| Works with your existing generator | Usually, with a check | Yes |
| Cost | Higher | Lower |
| Watch for | A rigid sensor to position carefully | Plates that need careful handling |
IDEXX’s guide to digital dental imaging describes the same two families: direct-imaging sensors, and photosensitive phosphor (PSP) plates. It also notes that either way, a dental X-ray unit is still required to expose the sensor or plate.
DR options. The Dentalaire DTX Size 4C DR Sensor has a 51.6 mm by 34 mm active image area, a 2580 by 1706 pixel count, 20 lp/mm typical resolution, and a USB connection with a 2 m cable. If you’d rather buy a complete setup, the Dentalaire Veterinary Digital Dental Imaging System comes in three versions: with a #1 and a #2 sensor, with a #1 sensor and software, or with a #2 sensor and software. Every version includes a mouth prop kit, sensor sleeves, germicide wipes, and two sensor boots. The sensor housing is bite resistant, which helps protect your investment when it ends up between a patient’s teeth.
CR option. The Dentalaire DTX Dental CR Reader works with your existing X-ray equipment, uses reusable imaging plates, and has a touchscreen, a built-in erase function, and autocalibration. That means no darkroom and no chemicals, and you don’t have to replace your generator.
Sensor size. A smaller sensor is easier to position in a cat or small dog, and a larger one covers more of a large dog’s mouth in fewer images. That’s why the complete DTX system offers #1 and #2 sensors.
Part 3: Software
The software decides how fast your team gets from exposure to a usable image, and whether images stay attached to the right patient. The DTX software has veterinary-specific workflow functions, an anatomically correct display on capture, image comparison, tagging and labeling, customizable patient reports, a direct e-mailer, and routing to multiple PACS.
Ask any vendor how images get into your practice software, how they’re stored, and how you’d share them with a referral clinic or a client.
Technique matters as much as the gear
A good system still needs good positioning. In dogs and cats, the parallel technique can only be used for the caudal mandible. Everywhere else, the bisecting angle technique is the standard, because oral structures prevent parallel placement. Veterinary dentistry guidance explains it well in this technical guide to veterinary dental radiography.
For a full-mouth series, a cat or small dog typically needs about 10 to 12 images, and a larger dog up to about 18. If your team is retaking images regularly, the fix is often positioning practice, not new equipment.
Safety and compliance in Canada
Dental X-ray equipment follows the same rules as any other X-ray machine, and regulators have paid attention to veterinary dental X-ray facilities. In Ontario, the Ministry of Labour has run inspection blitzes that included them. Under Ontario’s Regulation 861, the expectations include:
- Registering your X-ray equipment with the Ministry of Labour
- Providing a personal dosimeter to each worker who may be exposed, and keeping the readings
- Using a preset timer and a switch to control exposure
- Not holding film cassettes by hand during an exposure
- Keeping a record of every exposure, including the date, kilovoltage, tube current, and duration, for at least one year
Other provinces have their own requirements. See the CVO’s radiation safety overview, Health Canada’s Safety Code 28, and our guides to radiation safety in Canada and hands-free X-ray technique.
A shortlist to start from
Based on the specs on each product page, here’s how I’d sort it. It’s a starting point, not a ranking:
- Building a dedicated dental room: the DC Wall-Mounted generator plus the complete DTX Digital Imaging System.
- Already own a generator, want faster workflow: a DR setup, either the Size 4C sensor or a full DTX system.
- Moving from film on a tighter budget: the DTX CR Reader with your existing generator.
- Mobile practice: the DC Mobile, and check your province’s rules for mobile units.
Questions to ask any vendor before you buy
- Will this work with my existing generator, and has it been checked for consistent exposure timing?
- What’s in the box: sensor or reader, software, sleeves, props, and boots?
- How do images get into my practice software?
- Who installs it and who services it?
- What’s the warranty, and is a loaner available if something fails?
- Will you help me with the regulatory paperwork my province requires?
Our repair team provides phone support and repairs, our inspection service covers preventative maintenance and X-ray compliance, and the Just Works service plan puts it on a schedule. Financing is available, and if you’re building a dental suite as part of a new clinic, our new clinic planning service can help you sequence it. You can also see our veterinary dental X-ray equipment overview and our full dental equipment range. For a quote on any of these, request one here.
Frequently asked questions
Do I need dental X-rays for every dental? AAHA’s 2019 dental care guidelines strongly recommend full-mouth intraoral dental radiographs in all dental patients. At a minimum, they say pre- and post-extraction radiographs are essential.
How often do radiographs find something the exam missed? In the studies AAHA cites, about 28% of grossly normal teeth in dogs and about 42% in cats had clinically important findings on radiographs.
Are hand-held dental X-ray units legal in Canada? No. Hand-held X-ray equipment doesn’t meet the requirements of the Radiation Emitting Devices Regulation and isn’t permitted in Canada.
What’s the difference between DR and CR for dental imaging? A DR sensor connects to your computer and shows the image right away. CR uses reusable plates that you scan in a reader. DR is faster, and CR usually costs less and works with your existing generator.
Can I use my existing generator with a digital sensor or CR plates? Often yes, but a dental X-ray unit is still required to expose the sensor or plate, and older units can have inconsistent exposure timing. Have yours checked before you invest in a sensor.
How many images are in a full-mouth series? Typically about 10 to 12 in a cat or small dog, and up to about 18 in a larger dog.
Do I need a dedicated room for a dental X-ray unit? It depends on your province. In Ontario, the Ministry of Labour generally expects mobile units in a permanent clinic to be permanently installed in the dental treatment room, unless you submit plans for approval. Check with your own regulator.
Further reading:
- AAHA, 2019 AAHA Dental Care Guidelines for Dogs and Cats
- Today’s Veterinary Practice, Intraoral Radiographs: Identifying Normal Anatomy
- IDEXX, Digital Intraoral Radiology: Standard of Care for Dental Practice
- College of Veterinarians of Ontario, Radiation Safety
