When a set of horizontal bitewing radiographs are correctly mounted for viewing, which one of the following descriptions will not be seen?

When a set of horizontal bitewing radiographs is correctly mounted for viewing, the root apices will not be positioned at the top and bottom of the radiographs. Instead, bitewing radiographs are designed to capture the crowns of the teeth along with the interproximal areas, focusing primarily on the coronal portions of the teeth.

In these radiographs, the bitewing tabs are typically positioned at the top, and when viewed, the upper part of the film contains the crowns of the teeth in the arch, while the lower part includes less important anatomical details, often along the root surfaces. Thus, it is more accurate for the apices to be located towards the lower region, as the main focus is on the areas where cavities or other dental issues are likely to occur between the teeth.

This mounting technique helps ensure that key diagnostic information is readily visible to the clinician, while the positioning of the radiograph adheres to standard viewing protocols.