BU Dental Radiology Practice Exam

Periapical radiographs are focused on the area around the apex of a tooth. They capture the tooth from crown to root tip and include the surrounding bone, specifically showing the periapical region, the root ends, the lamina dura, and the periodontal ligament space. This makes them ideal for evaluating periapical health, root morphology, and canal status, as well as detecting lesions such as abscesses or granulomas near the root tips. In contrast, bitewing radiographs mainly visualize the crowns of posterior teeth and the interproximal areas between teeth; occlusal views capture a larger portion of the arch to show development or pathologies on the floor or roof of the mouth; panoramic radiographs provide a broad view of the entire jaws and supporting structures but with less detail about the periapical tissues of individual teeth. Therefore, the region shown by periapical radiographs is the periapical area around the tooth roots.