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There’s no single schedule that fits everyone. In the US, dentists generally decide how often to take X-rays based on each person’s risk, rather than a fixed calendar. Someone with frequent cavities, gum disease or ongoing treatment may need them more often than someone with a long history of healthy teeth.
Why they’re used: X-rays show things a visual exam can’t, such as decay between teeth, bone levels around teeth, infections at root tips, and developing teeth in children.
Common types: bitewings (back teeth, checking for cavities between teeth), periapicals (a whole tooth and root), panoramic images (the whole jaw) and, for some procedures, 3D cone-beam scans.
Reasonable questions to ask:
- “Why do you recommend these X-rays today?”
- “Can you use my recent X-rays from my previous dentist?”
- “Does my insurance limit how often these are covered?” (frequency limits are explained in our dental insurance glossary)
Tell the team if you are or might be pregnant. Modern digital X-rays use low radiation doses, and offices use protective measures, but it’s fine to ask how they keep exposure low.
General education only, not a diagnosis or treatment advice. Please see a licensed dentist about your own situation. For a medical emergency (trouble breathing or swallowing, heavy bleeding, a major injury or rapidly spreading swelling), call 911 or go to the nearest ER.
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