Periapical radiograph is described as a dental x-ray that shows the apex of a tooth and the area surrounding the apex.

• A. a dental x-ray that shows the apex of a tooth and the area surrounding the apex
• B. an intraoral radiograph that shows the crowns in occlusion
• C. an X-ray aimed at the TMJ region
• D. an extraoral radiograph showing the entire jaw

Answer: (A)

Periapical radiographs focus on the tooth root and the surrounding bone, capturing the apex and the adjacent periapical tissues. This is exactly what the description conveys: a dental x-ray that shows the apex of a tooth and the area surrounding the apex. They are taken intraorally and typically include the tooth from crown to apex plus a portion of the surrounding bone, allowing evaluation of root structure, root length, and any periapical pathology such as lesions or bone loss. In contrast, bitewing radiographs show the crowns and the interproximal bone between adjacent teeth, TMJ-focused X-rays target the temporomandibular joint, and extraoral radiographs like panoramic images show larger areas of the jaw but not the detailed periapical region of a single tooth.