X-ray contrast

X-ray contrast (Latin radiopacitas) is the physical property of tissues and materials to retain X-rays. Objects with high contrast absorb more rays, making them appear lighter or whiter on an X-ray image.

Differential diagnosis

Different structures of the maxillofacial region have different contrast:

• Enamel and metallic designs are the highest contrast (bright white).
• Dentin and bone tissue – medium contrast.
• Pulp and foci of inflammation – low contrast (dark areas).

Clinical significance

The doctor uses the degree of contrast of various anatomical structures on the radiograph to diagnose various pathological processes and control the quality of treatment. X-ray contrast of filling materials allows to make sure that the root canal is filled densely, without voids and all the way to the apex. This property is also critical for the diagnosis of condensing osteitis, fibrous bone dysplasia and other processes in which the bone looks significantly lighter than normal.