FDI Diagnostic Imaging Practice Exam 2026 – Complete Test Prep

The main idea is to image a specific tooth and the surrounding bone near its apex to evaluate the tooth’s health and the root canal system. A periapical radiograph provides a focused view of the tooth, the apex, and the periapical tissues, allowing detection of periapical pathology such as lesions, assessment of root canal morphology (how many canals, their paths, any curvatures or calcifications), and evaluation of healing after treatment. This targeted information is essential for diagnosing endodontic disease and planning or assessing endodontic therapy. Other tasks listed would require different images: TMJ issues need joint-focused imaging, assessing bone density of the entire jaw calls for full-arch views or CBCT, and sinusitis is best evaluated with sinus-focused imaging.