Dental Assistant Practice Exam

Which type of radiograph is classified as a panoramic radiograph?

1. Full mouth series

2. Intraoral radiograph

3. Extraoral image

4. Cone beam computed tomography

The correct answer is: Extraoral image

A panoramic radiograph is best classified as an extraoral image because it captures the entire view of the dentition and surrounding structures on a single film. This type of radiograph is taken from outside the mouth and provides a broad view of the teeth, jaws, and facial structures, which is particularly beneficial for assessing the overall dental condition and identifying potential issues that may not be visible on smaller intraoral radiographs. In contrast, a full mouth series consists of multiple intraoral radiographs, capturing detailed images of individual teeth and their immediate surroundings, providing a more localized view. Intraoral radiographs are specifically taken inside the mouth to visualize specific teeth and their conditions. Cone beam computed tomography (CBCT), while offering detailed images for much of the same area covered by a panoramic radiograph, utilizes 3D imaging technology and is not classified as a standard panoramic image. Thus, the distinction between extraoral and intraoral imaging techniques is key to categorizing the panoramic radiograph correctly.