What information cannot be determined from an x-ray?

The ability to assess various dental conditions using x-rays is a fundamental aspect of diagnostic imaging. While x-rays can provide valuable information regarding the condition of bones, roots, and the presence of dental caries, they do not directly measure certain clinical parameters.

The measurement of pocket depth specifically requires clinical evaluation with a periodontal probe during an examination. This measurement indicates the health of the periodontal tissues and can provide information about the presence of periodontal disease. X-rays can show changes in the bone levels, but they do not give a tactile sense or direct measurement of how deep a periodontal pocket is. Therefore, since pocket depth is assessed through physical examination rather than imaging, it cannot be determined from an x-ray.

In contrast, bone loss can be observed on an x-ray by examining the radiographic appearance of the alveolar bone surrounding the teeth. Additionally, root length can be accurately visualized on x-rays, as the films can provide a clear view of the entire root structure. The presence of dental caries can also be determined via x-ray by identifying areas of radiolucency on the enamel or dentin, which indicate decay. Thus, pocket depth stands out as the parameter that is not ascertainable through x-ray imaging.