Cone beam computed tomographic imaging has increasingly become an important adjunct to our diagnostic toolbox in orthodontics. This article provides some practical tips to clinicians for the viewing and interpretation of cone beam computed tomography in orthodontics, particularly in relation to root resorption.
CPD/Clinical relevance: This article informs the orthodontic team on the applications of cone beam computed tomography and provides practice tips for viewing and interpreting images in practice, with particular regard to root resorption.
In accordance with the established guidelines, including the Ionising Radiation (Medical Exposure) Regulations,1 SEDENTEXCT2 and British Orthodontic Society guidelines,3 the decision to take a cone beam computed tomography (CBCT) image should be case-specific, indicationorientated and clinically justified.4 In cases where plain films fail to provide the necessary information required for diagnosis and treatment planning, additional information provided by a CBCT can improve diagnostic yield and anatomical accuracy.5,6
There are several recognized indications in orthodontics where CBCT may be appropriate. These include:
If the decision is made to take a CBCT, the ALARP (as low as reasonably practicable) principle of keeping the patient's radiation dose as low as possible should be followed, owing to the potentially significantly higher effective dose administered by CBCT than by conventional radiographic techniques.
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