What is a common use for periapical films in dental radiography?

Periapical films are specifically designed to capture detailed images of the entire tooth structure, including the root and surrounding bone. This makes them particularly valuable in showing the shape, length, and number of roots of teeth. They provide a close-up view that is essential for diagnosing conditions related to the root, such as periapical abscesses or evaluating the extent of periodontal disease.

While periapical films can incidentally help in evaluating tooth decay and offer some information relevant to orthodontics, their primary use focuses on the relationship and condition of the roots and the supporting bone structure. Visualizing occlusion is typically done using other types of dental films or imaging techniques, not periapical films. Thus, the correct choice emphasizes the unique capability of periapical films to outline detailed root anatomy and characteristics, vital for treatment planning and diagnosis in dental radiography.