CBCT is a dental scan that uses a cone shaped beam of radiation to create a three dimensional image of a selected area of the jaws. Unlike a conventional dental radiograph, it allows the clinician to examine cross sections. This can clarify the position of structures when a flat image cannot answer a particular clinical question.
When the extra detail helps
A scan may help with implant planning, assessment of impacted teeth or selected problems in root canal treatment. It is not a routine requirement before every dental consultation. The reason for taking it should be linked to a finding that could change the diagnosis or treatment plan.
Before the scan
CBCT involves ionising radiation. The area and exposure settings should suit the clinical need and avoid unnecessary radiation. Tell the team if you are pregnant or might be pregnant, and mention previous imaging of the same area. Bringing existing images can help prevent an unnecessary repeat scan.
An image still needs interpretation
The scan files do not replace assessment by a suitably qualified clinician. Images need to be considered alongside your symptoms and examination. You can ask which area will be scanned, what question the scan should answer, and how you will receive the images and report.
A three dimensional image is not automatically the best investigation. A smaller examination may be enough, or a different imaging method may be more appropriate.