Overexposure of film results in increased density and dark film.

Orthopantamograph is not indicated in viewing all of the above: anterior body of mandible, coronoid process, lower anterior region of mandible.

Grid is used in radiography to reduce fogging.

For detection of pathology in both Stenson's and Wharton's duct after sialogram, the indicated radiographic view is panoramic.

To change from the long scale contrast film technique to a short scale contrast film technique while maintaining the same density, decrease the kVp and increase the mA.