What does high density in a radiograph indicate?

High density in a radiograph indicates that more x-rays were absorbed by the tissues or structures being imaged. When a specific area on the radiograph appears darker, this typically means that those tissues have allowed more x-rays to pass through and have not been adequately blocked or absorbed. Conversely, areas that are lighter indicate that fewer x-rays reached the film or detector, suggesting that those tissues are denser or more opaque, absorbing more radiation.

This concept is critical in interpreting dental radiographs because it guides dental professionals in identifying structures, cavities, and pathologies based on the varying shades of gray in the image. A clear understanding of how density relates to x-ray absorption helps in making accurate diagnoses and treatment plans. Thus, recognizing that high density corresponds to greater absorption of x-rays is fundamental in radiographic analysis.