What principle is used in panoramic radiography?

In panoramic radiography, the principle utilized is tomography. This technique allows for the creation of a two-dimensional image of the dental structures by capturing a series of images from different angles and compiling them to form a comprehensive view. The primary advantage of this method is that it can visualize the entire dental arch, including the teeth, jaw, and surrounding anatomical structures, in a single image.

Tomography works by moving the X-ray tube and the film or sensor in such a way that only the selected plane of interest remains sharply focused while other structures are blurred. This is beneficial in dental practices where a full arch view is necessary for diagnosis and treatment planning. Other principles, such as long cone paralleling and laminography, are not specifically employed in panoramic radiography; rather, they are associated with different imaging techniques or have different applications in dental X-ray practices.