Q: What can you tell me about x-rays?
A: The x-ray, also known as a radiograph, is one of a dentist's essential tools. That's because the x-ray lets the dentist see what's happening beneath and inside objects the eye can't penetrate. Here are some facts about x-rays:
- When x-rays pass through the mouth more of them are absorbed by the denser portions of the mouth - like teeth and bone - than by the soft tissue - like cheeks and gums - before they strike the film. Teeth appear lighter because fewer x-rays pass through them. Conversely, cavities and gum disease appear darker because more x-rays penetrate them.
- The frequency of x-rays depends on an individual patient's needs. Your schedule will vary according to your age, your risk of disease and any signs or symptoms of a problem. You and your dentist can discuss an x-ray schedule that's appropriate for your treatment. If you are a new patient, however, it's likely your dentist will want to take a set of radiographs to see if there are any hidden conditions, and to establish a baseline for further comparison.
- Children may need x-rays more frequently than adults because their teeth and jaws are still developing.
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