What is the primary purpose of a bitewing radiograph in dental diagnostics?

• A. To assess root canal anatomy exclusively.
• B. To measure bite force.
• C. To evaluate interproximal caries and crestal bone levels—short, efficient view of posterior teeth.
• D. To evaluate occlusal wear only.

Answer: (C)

Bitewing radiographs give a compact image of the crowns of the posterior teeth and the surrounding bone between them, making them ideal for two key tasks: detecting interproximal caries and evaluating crestal bone levels. This view highlights decay that occurs between adjacent teeth and shows changes in the height of the alveolar bone near the tooth crowns, which helps identify early periodontal bone loss. Because the film captures the crowns and the bone crest in a short, efficient view, it’s well-suited for routine caries screening and periodontal monitoring in the back of the mouth. They aren’t the best tool for detailing root canal anatomy—that’s better seen on periapical radiographs—and they aren’t used to measure bite force or assess occlusal wear as the primary purpose. In clinical practice, this radiograph is the go-to for checking interproximal decay and bone support in posterior teeth.