A dental Cone Beam CT (CBCT) is a specialized type of X-ray scan that creates detailed, three-dimensional images of your dental structures. Unlike standard flat dental X-rays, CBCT uses a cone-shaped X-ray beam that rotates around your head. This captures hundreds of images in a single scan and combines them into a highly detailed 3D model.
This scan is commonly ordered by dentists, orthodontists, or oral surgeons when they need to evaluate your bone density, nerve pathways, or sinuses before complex dental procedures.
Common Indications for a Dental Cone Beam CT (CBCT)
- Planning the exact placement of dental implants.
- Evaluating impacted teeth (like wisdom teeth) and their proximity to nerves.
- Assessing bone structure and density in the jaw.
- Diagnosing issues with the jaw joint (temporomandibular joint, TMJ).
- Evaluating dental tumors, cysts, or deep infections in the jawbone.
- Planning orthodontic treatments or reconstructive surgeries.
What exactly does a dental Cone Beam CT (CBCT) show?
The scan shows a 3D view of your teeth, jawbone, surrounding soft tissues, nerve pathways, and paranasal sinuses. It allows your dentist to measure the exact thickness and height of the bone where an implant will be placed.
How should I prepare for a dental Cone Beam CT (CBCT)?
No special preparation is needed. You do not need to fast. You will be asked to remove any metal objects, including earrings, necklaces, hairpins, eyeglasses, dentures, or hearing aids, as metal can block the X-ray beam and blur the images.
Do I need to stop taking medication?
No. Continue taking all your medications as normal.
What happens when I arrive for my scan?
You will go to the scanning room. The radiographer will place a lead apron over your chest to protect you from scattered radiation. They will help you position your head in a specialized rest to keep you still.
How is the procedure performed?
You will stand or sit in a chair. You will be asked to bite down on a small plastic mouthpiece to align your teeth. The scan machine has a C-arm that will rotate 360 degrees around your head. You will hear a humming sound as it rotates. You must remain completely still and avoid swallowing for the duration of the scan.
How long does a dental Cone Beam CT (CBCT) take?
The actual scan takes only about 10 to 40 seconds. The entire appointment, including positioning, takes about 10 to 15 minutes.
Is there any discomfort?
No. The scan is completely painless and comfortable.
Are there risks?
The scan uses a low dose of radiation. While it is higher than a standard dental X-ray, it is significantly lower than a medical CT scan. The benefits of an accurate 3D map for surgery far outweigh the small radiation risk.
Can children have this scan?
Yes. Children undergoing orthodontic treatment or cleft palate surgery can have this scan safely. The radiographer will adjust the settings to use a lower child-specific dose.
Can I have this scan if I am pregnant?
Pregnancy Precaution
Tell your doctor or dentist if you are pregnant or think you might be. While the radiation is focused entirely on your head and a lead shield covers your abdomen, dental CBCT is usually postponed until after birth unless urgently needed for an infection.
When will I get my results?
The 3D model is generated immediately. The images will be sent to your referring dentist or oral surgeon on a CD, USB, or digitally within a few hours.
What if the scan finds something?
Your dentist will use the 3D images to design your surgical or implant plan. If any unexpected issues like sinus infections or cysts are found, they will discuss them and coordinate the appropriate care.
Conclusion
A dental CBCT scan provides a highly detailed 3D map of your mouth, making dental surgeries safer and more predictable. To ensure a clear scan, remember to remove all metal objects from your neck and head before the scan starts.