What is the most common cause of false-negative radiographic caries detection?

What is the most common cause of false-negative radiographic caries detection?

• A. Overexposure.
• B. Motion blur.
• C. Low resolution.
• D. Early enamel lesions that are not yet radiolucent or lesions located in areas not captured by the current view.

Answer: (D)

Radiographs reveal caries only when there is enough mineral loss to create a detectable radiolucency. Early enamel caries are often subsurface demineralization with an intact outer enamel, so they don’t appear on conventional radiographs. That makes these lesions a common source of false negatives. In addition, lesions that lie in areas not captured by the current image—such as proximal surfaces not included in the bitewing view or occlusal regions outside the field of view—can also be missed. Together, these factors explain why the most common cause of a false-negative radiographic caries detection is lesions that are not yet radiolucent or are outside the radiographic view.

Radiographs reveal caries only when there is enough mineral loss to create a detectable radiolucency. Early enamel caries are often subsurface demineralization with an intact outer enamel, so they don’t appear on conventional radiographs. That makes these lesions a common source of false negatives. In addition, lesions that lie in areas not captured by the current image—such as proximal surfaces not included in the bitewing view or occlusal regions outside the field of view—can also be missed. Together, these factors explain why the most common cause of a false-negative radiographic caries detection is lesions that are not yet radiolucent or are outside the radiographic view.