MEDICINE
RADIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Radiolucent
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Radiopaque
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Either A or B
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None of the above
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Detailed explanation-1: -Structures that are cavities, depressions, or openings in bone such as a sinus, fossa, canal or foramen will allow x-rays to penetrate through them and expose the receptor. These areas will appear radiolucent or black on radiographic images.
Detailed explanation-2: -In a periapical radiograph, the enamel, which is the hardest substance in the human body, appears as the most radiopaque (lightest) part of the crown of the tooth. The dentin is a less-mineralized hard structure of the tooth between the enamel and the pulp and is not as radiopaque as the enamel.
Detailed explanation-3: -Tooth enamel and amalgams look white (radiopaque). Tissues and bone are less dense and allow more X-‐rays to reach the film. Therefore, tissue and bone look darker (radiolucent).
Detailed explanation-4: -1. Enamel: It’s, the most radiopaque structure. 2. Dentin: It’s less the most radiopaque than enamel.