Bitewing, panoramic, and 3D dental images: why the choice matters
Each image answers a different question. Bitewings show decay between back teeth and the bone level near the crowns; periapical films show a whole tooth to its root tip; a panoramic image surveys the whole jaw, sinuses and joints at lower detail; a cone-beam CT (3D) scan shows bone width, nerve and sinus position in three dimensions and is reserved for questions the flat images cannot answer, such as implant planning or complex roots. The dentist chooses the smallest image that answers the question after examining you.
The images side by side
| Image | Shows | Typical question | Relative dose |
|---|---|---|---|
| Bitewing | Crowns of back teeth, contacts, bone crest | Decay between teeth; early bone loss | Low |
| Periapical | One or a few whole teeth to the root tips | Infection at a root; root shape; fracture | Low |
| Panoramic | Whole upper and lower jaw, sinuses, joints | Wisdom teeth; overview; jaw lesions | Low to moderate |
| Cone-beam CT | 3D bone, nerves, sinuses, roots | Implant planning; impacted teeth; complex root canal; suspected root fracture | Higher than flat films; varies with field size |
MedlinePlus describes the common dental x-ray types (MedlinePlus); the FDA describes cone-beam CT and advises it be used only when the clinical question justifies it (FDA).
What changes the choice
The clinical question; your decay and gum-disease risk; previous images available; symptoms; planned treatment; and age. The American Dental Association's selection criteria say imaging is chosen for the individual after an examination, not on a fixed schedule (ADA).
Why not always the most detailed image
More detail means more dose and more incidental findings that may need follow-up without benefit. A panoramic image cannot find early decay between teeth; a bitewing cannot show a sinus. The right image is the one matched to the question.
Questions to ask
What question will this image answer? Do my previous images already answer it? What would change in my plan depending on the result?
The studio lists examinations with imaging where indicated (studio).
Next step: Request a consultation or call (805) 565-5111. A request is not a confirmed appointment; the office confirms times during its listed hours (Monday to Thursday, 8 am to 5 pm, plus select Fridays).
Which-image-for-which-question guide
| My question | Image usually chosen |
|---|---|
| Do I have decay between my back teeth? | Bitewings |
| Is there infection at the root of this tooth? | Periapical |
| Where are my wisdom teeth? | Panoramic |
| Is there enough bone for an implant, and where is the nerve? | Cone-beam CT |
| Is this root cracked? | Periapical first; CBCT if still unclear |
Ask: what will this image change in my plan?
Guides are general education; an examination is needed for individual advice.
Sources
- Dental x-rays (MedlinePlus Medical Encyclopedia, reviewed Feb 5, 2026) — MedlinePlus, U.S. National Library of Medicine
- Dental Cone-beam Computed Tomography — U.S. Food and Drug Administration
- Oral Health Topics: X-Rays/Radiographs (updated Mar 26, 2026) — American Dental Association
- Loul Dental Studio: Services — Loul Dental Studio
Sources were current when this guide was last updated.
Educational content, not a diagnosis. Please contact the studio to discuss your own situation.