Final answer:
A panoramic radiograph is best for visualizing the buccal cortex of the mandible, offering a comprehensive view of the jaw and related structures.
Step-by-step explanation:
The panoramic radiograph is the best imaging modality for depicting the buccal cortex of the mandible. This radiograph provides a broad overview of the entire jaw, showing the teeth, jawbone, and other structures of the oral cavity and surrounding areas. A bite-wing radiograph may offer some information but has limited scope, mostly used for detecting cavities between the teeth. The periapical radiograph is good for showing the details of individual teeth and the surrounding bone structure but does not encompass a substantial portion of the buccal cortex. The occlusal radiograph mainly visualizes the floor of the mouth or the palate and is not ideal for viewing the buccal cortex.