What type of radiograph is most commonly used to detect interproximal caries?

The bitewing radiograph is the most commonly used type of radiograph for detecting interproximal caries due to its specific design and field of view. Bitewing images capture the crowns of both upper and lower teeth simultaneously, allowing for clear visualization of the areas between the teeth where carious lesions often develop. This is crucial for early detection, as interproximal caries can be challenging to identify through visual examination alone.

The bitewing's positioning provides a focus on the areas that are most susceptible to decay, making it an essential tool for preventive dentistry and routine examinations. In addition, it helps dentists assess the fit of restorations, check for bone levels, and evaluate periodontal health.

Other radiographs, like panoramic images, primarily offer a broad overview of oral structures and do not provide the detail necessary to effectively diagnose interproximal caries. Periapical radiographs focus on the roots and surrounding bone, which may overlook early caries located in the interproximal spaces. Cone beam computed tomography (CBCT) scans provide 3D images that are useful in complex cases, but they are not typically employed for basic caries detection due to their higher cost and radiation exposure compared to bitewing radiographs.