Procedures
What to Expect During a Cone Beam (CBCT) Scan in Los Gatos, Step by Step
Key takeaways
- A dental Cone Beam (CBCT) scan takes about 10 to 40 seconds of rotation, with roughly 10 to 20 minutes in the room overall.
- Nothing enters the mouth during a CBCT scan and no sedation or numbing is required, so patients can drive themselves home and return to work the same day.
- Removing earrings, glasses, hairpins, and removable dental appliances before a CBCT scan prevents metal streaks that can blur the images.
- Movement is the most common reason a cone beam scan has to be repeated, which is why patients are asked to hold still and avoid swallowing during the rotation.
- CBCT is ordered when 3D detail changes a treatment decision, such as locating a nerve before implant or wisdom tooth surgery, rather than as a routine screening image.
A Cone Beam (CBCT) scan is a short, standing or seated 3D X-ray that usually takes less than a minute of actual scanning, with about 10 to 15 minutes in the room from start to finish. Nothing touches the inside of your mouth, there are no needles, and you walk out able to drive, work, eat, and go back to your day immediately.
The part most people remember is simply holding still while an arm rotates once around your head. That single rotation gives us a three-dimensional view of your jaws, nerves, sinuses, and airway that a flat X-ray cannot show.
The short answer
- Total visit time: roughly 10 to 20 minutes for the imaging portion alone.
- Scan time: commonly 10 to 40 seconds of rotation, depending on the field of view.
- What you feel: nothing. You stand or sit still, bite gently on a positioning piece, and the machine moves around you.
- After: no recovery, no restrictions, no sedation needed for the scan itself.
Before your appointment
Most of the preparation is quick, and all of it is in your control.
Paperwork and records
- Complete your health history forms ahead of time so check-in is short.
- Bring your photo ID and dental and medical insurance cards.
- Bring or forward any recent X-rays, scans, or reports from your general dentist or orthodontist. Prior images help us compare, and sometimes reduce what we need to retake.
- If you were referred, bring the referral slip or the name of the referring office.
What to wear and leave at home
Metal creates bright streaks on the images, so plan to remove earrings, necklaces, hair clips, eyeglasses, hearing aids, and any removable dental appliances such as partials, retainers, or dentures. Wearing a top without a zippered collar or heavy metal hardware makes this easier. Permanent dental work like crowns, fillings, and implants stays in place — we expect those and account for them.
Logistics for Cupertino and nearby patients
Our office is at 14830 Los Gatos Boulevard, Suite 200. Patients driving over from Cupertino, Saratoga, or Campbell should allow extra time during commute hours. Because the scan itself requires no sedation, you can drive yourself in and out. If you are nervous about imaging in general, tell us when you book so we can plan a slower, more explained visit.
During the scan, stage by stage
1. Check-in and review (3 to 5 minutes)
We confirm why the scan was ordered — implant planning, a wisdom tooth close to a nerve, a jaw joint question, a sinus concern, or a lesion seen on a flat X-ray. We also ask whether you are or might be pregnant. This is routine for any dental imaging.
2. Setup (2 to 3 minutes)
You remove metal items and, if we are using one, put on a protective apron. We then position you in the unit. Depending on the machine and your mobility, you may stand, sit, or rest your chin on a support. Light head supports or a gentle strap help you stay steady — they are snug, not tight.
3. Positioning and alignment (1 to 2 minutes)
We line up thin guide lights with landmarks on your face so the area of interest sits in the center of the image. You may be asked to bite lightly on a small plastic piece, keep your tongue on the roof of your mouth, and close your lips. These small details sharpen the result.
4. The rotation (10 to 40 seconds)
We step behind a shield and start the scan. The arm swings around your head once. You will hear a quiet hum or clicking. You feel nothing — no warmth, no pressure, no sensation at all. The single instruction is to stay still and breathe normally. Avoid swallowing if you can, because movement is the main reason a scan has to be repeated.
5. Image check (1 to 2 minutes)
The 3D volume appears on screen within seconds. We check it for motion blur and confirm the region we needed is fully captured. If something moved, we may repeat the scan. That is routine and not a sign anything is wrong.
6. Any companion imaging
CBCT is often paired with other tools in the same visit. An intra-oral camera is a small handheld wand that photographs the surface of a tooth or gum area — it goes in your mouth, takes a second or two, and shows you on a monitor what we are seeing. Digital scanning may capture the shape of your teeth for implant or surgical planning. None of these require numbing.
After the scan
The first hour
You put your jewelry and glasses back on and leave. There are no diet restrictions, no activity limits, and no aftereffects. Most patients go straight back to work or school.
The review conversation
Often we review the images with you the same day. We can rotate the 3D model, slice through it, and show you exactly what we are looking at — bone height, nerve position, sinus space, tooth root angles. If your surgeon needs more time or wants to consult your referring dentist, a follow-up conversation is scheduled instead.
The first week
A written report or treatment plan typically follows. If the scan was taken for implant planning, the next step is usually a surgical plan and a cost estimate. If sedation will be part of a future procedure, that is when we discuss your options, including oral conscious sedation, nitrous oxide, and IV sedation, and what each requires of you on the day.
Radiation and why 3D is used selectively
CBCT delivers more radiation than a single dental X-ray and less than a medical CT scan of the head. That is why it is ordered when the added detail changes a decision — such as placing an implant near a nerve — rather than as a routine screening image. We use the smallest field of view that answers the clinical question. If you want to review published background on dental cone beam imaging, the National Library of Medicine hosts peer-reviewed material on the subject.
About your bill
Imaging is often billed separately from any procedure. Ask what the scan code is and whether it is being filed to medical or dental insurance, since the answer differs by plan. Federal and California surprise billing protections give patients the right to a good faith estimate and limit certain unexpected out-of-network charges. We are glad to go through your estimate before the appointment rather than after.
When to call us
The scan itself does not cause symptoms, so calls after a CBCT visit are usually about logistics or about the condition that prompted the scan. Contact us at (408) 412-8400 if you notice any of the following:
- Swelling in your face, jaw, or neck that is new or getting larger
- A tooth that becomes loose, or a bite that suddenly feels off
- Difficulty opening your mouth, swallowing, or breathing comfortably
- Fever along with mouth or jaw symptoms
- A sore, patch, or lump in your mouth that has not healed in two weeks
- You did not receive your results or follow-up plan within the timeframe we gave you
- You cannot keep your appointment, or you need to adjust it because you are traveling in from Cupertino or out of the area
Frequently asked questions
Is a CBCT scan uncomfortable?
The scan itself produces no physical sensation — nothing touches the inside of your mouth and no needles are used. The only mild inconvenience is holding still for up to about 40 seconds, sometimes with a light chin rest or head support. Patients who find enclosed positions stressful should tell us ahead of time so we can take the setup slowly.
Do I need time off work for a CBCT scan?
No. Most patients schedule the scan around work and return the same hour. Budget 20 to 30 minutes for the visit, plus travel time if you are coming from Cupertino or elsewhere in the South Bay.
Can I drive myself home afterward?
Yes. A CBCT scan involves no sedation, so your coordination and reaction time are unaffected. Driving arrangements only become necessary if the scan is combined with a sedation appointment, such as oral conscious sedation or IV sedation, in which case you will need a responsible adult to drive you.
What happens if the plan changes during my appointment?
Sometimes the images reveal something that shifts the next step — a nerve closer than expected, a sinus that needs a graft, or a finding that calls for a biopsy. We stop, show you the images, and explain the revised options before anything else is done. No additional treatment or additional charge proceeds without your agreement.