Compared with a panoramic radiograph, a full-mouth survey (FMX) generally provides:

• A. Higher diagnostic detail of individual teeth and surrounding bone but at a higher radiation dose
• B. Less diagnostic information but lower cost
• C. Only two-dimensional view
• D. Excellent evaluation of soft tissues

Answer: (A)

The main idea is that the amount of detail and the radiation exposure differ between these two types of dental radiographs. A full-mouth survey uses multiple periapical images focused on individual teeth, so you get much clearer visualization of tooth structure, root anatomy, and the surrounding supporting bone. This higher-resolution, tooth-by-tooth detail lets you detect fine caries, subtle bone changes, and periapical pathology more reliably than a single panoramic image. However, because you’re taking several exposures, the total radiation dose is higher with a full-mouth survey than with a panoramic.

Keep in mind that both techniques produce two-dimensional images and provide limited information about soft tissues. The choice of full-mouth surveys is driven by the need for detailed evaluation of hard tissues around each tooth, accepting the trade-off of higher radiation dose and longer exam time.