A pano, short for panoramic radiograph, is a dental x-ray that captures your entire mouth in a single, wide image. Unlike the small x-rays your dentist places inside your mouth, a pano is taken from outside using a machine that rotates around your head, producing a flat, two-dimensional picture of both jaws, all your teeth, your sinuses, and the surrounding bone.
How a Panoramic X-ray Works
The technology behind a pano combines two imaging principles: tomography (capturing a specific layer of tissue) and slit radiography (scanning a large area with a narrow beam). During the exposure, the x-ray source sits on one side of your head and the image receptor on the other. Both move simultaneously in opposite directions while a narrow vertical slit beam passes through your jaw from the tongue side outward. This linked motion keeps the structures closest to the receptor in sharp focus while blurring everything on the opposite side, which is how the machine isolates the curved dental arch into one clean image.
The x-ray tube is fixed at a slight downward angle, roughly negative 10 degrees, and rotates behind your head in a semicircle. The entire exposure takes about 12 to 20 seconds. You stand or sit still with your chin on a small rest, and the arm of the machine sweeps around you. There’s no discomfort, and the whole process from positioning to finished image usually takes just a few minutes.
What a Pano Can Show
A panoramic x-ray gives your dentist a broad overview that smaller, targeted x-rays can’t provide. It’s especially useful for evaluating:
- Wisdom teeth: Their position, angle, and stage of development, particularly in patients between 16 and 19 years old.
- Jaw trauma: Fractures or other injuries to the upper or lower jaw.
- Unerupted or impacted teeth: Teeth that haven’t broken through the gum or are trapped beneath bone.
- Tumors and cysts: Growths within the jawbone, including residual cysts and developmental abnormalities.
- Infections: Periapical pathology, meaning infections at the root tips of teeth.
- Bone conditions: Systemic diseases that affect bone metabolism can sometimes show up on a pano.
Your dentist is most likely to order a pano when there’s clinical suspicion of one of these issues, or when they need a complete picture of your mouth before a major treatment plan. The FDA identifies several predictors that make a pano diagnostically valuable: suspected teeth with infections at the root, partially erupted teeth, visible cavities, swelling, and suspected unerupted teeth.
Panos in Implant Planning
If you’re considering dental implants, a pano is often one of the first imaging steps. It provides a single view of the lower half of the maxillary sinuses, the full body of the lower jaw, and the upper jaw, letting your dentist make an initial estimate of vertical bone height and assess cortical bone boundaries and the crest of the ridge where an implant would be placed. Identifying key landmarks, like the nerve canal in the lower jaw or the floor of the sinus above, is straightforward on a pano.
That said, a pano has real limits for implant planning. It’s a two-dimensional image, so it can’t show the slope of the bone ridge or its width from cheek to tongue. For those measurements, most implant cases also require a 3D scan (cone beam CT). Think of the pano as the screening tool that helps your dentist decide whether to move forward, not the final blueprint.
Radiation Exposure
A panoramic x-ray delivers a low radiation dose. Background radiation from the natural environment, the kind you absorb just from living on Earth, averages about 3.6 millisieverts per year, or roughly 10 microsieverts per day. The dose from a pano is in a similar ballpark to what you’d receive from a couple of days of normal background exposure. Studies measuring absorbed doses around panoramic machines found values ranging from about 108 to 155 microsieverts at close range, with readings farther from the machine dropping to levels statistically indistinguishable from background radiation.
For context, a pano exposes you to far less radiation than a medical CT scan of the head, which can deliver hundreds of times more. The dose is low enough that it’s considered safe for routine diagnostic use, including in adolescents being evaluated for wisdom teeth.
How Often You’ll Need One
There’s no universal schedule for panoramic x-rays the way there is for bitewing x-rays (the small cavity-checking films taken every year or two). Joint guidelines from the FDA and the American Dental Association don’t specify a fixed interval for healthy adults. Instead, a pano is ordered when there’s a specific clinical reason: evaluating jaw development in teenagers, planning for extractions or implants, investigating unexplained symptoms, or establishing a baseline for a new patient with complex needs.
In practice, many dental offices take a pano every three to five years for established patients, but this varies based on your individual risk factors and what your dentist needs to see. Insurance plans commonly cover one panoramic x-ray every three years, though the specifics depend on your plan.
Cost Without Insurance
If you’re paying out of pocket, expect a panoramic x-ray to cost around $200 on average, with prices ranging from roughly $157 to $343 depending on your location and the dental office. Most dental insurance plans do cover panos, typically once every three years. If you’re unsure about your coverage, your dental office can usually verify this before the appointment.
Pano vs. Other Dental X-rays
The most common dental x-rays you’ll encounter are bitewings, periapicals, and panos, and each serves a different purpose. Bitewings focus on a small cluster of back teeth and are designed to catch cavities between teeth. Periapical x-rays show the full length of one or two teeth, from crown to root tip, making them ideal for diagnosing infections or root problems. A pano, by contrast, sacrifices that fine detail for breadth. It shows everything at once but at lower resolution than the smaller films.
This is why your dentist might take both a pano and a set of smaller x-rays during the same visit. The pano provides the big picture (jaw alignment, missing teeth, bone levels, pathology), while the targeted films zoom in on specific areas of concern. They complement each other rather than replace each other.