A bitewing radiograph is most useful for detecting which of the following?

• A. Interproximal caries and crestal bone levels
• B. Root canal anatomy
• C. Palatal rugae
• D. Temporomandibular joint abnormalities

Answer: (A)

Bitewing radiographs are used to visualize the crowns of the posterior teeth and the small amount of supporting bone between them, making them ideal for detecting interproximal caries and for assessing crestal bone levels that indicate periodontal support. They are the best option when you need to see decay that develops between adjacent teeth and to monitor bone height around those teeth. For root canal anatomy, periapical views that include the tooth apex provide clearer detail, and bitewings don’t offer much information about the TMJ or soft tissue landmarks like palatal rugae, which require other imaging approaches. So, bitewings are most useful for catching interproximal caries and evaluating crestal bone levels.