Which structure is radiopaque?

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Prepare for the BU Dental Radiology Test. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

Multiple Choice

Which structure is radiopaque?

Explanation:
In radiographs, radiopacity means a structure blocks X-rays and appears bright white on the image, while radiolucency means it allows X-rays to pass and appears dark. Gutta-percha is the root canal filling material that contains radiopaque additives (such as barium sulfate), so it shows up as a bright white line inside the canal on dental X-rays. This visibility is crucial for confirming root canal length and the quality of obturation. The other options—pulp, soft tissue, and nerve—are soft tissues with little mineral content, so they appear radiolucent (dark) on radiographs.

In radiographs, radiopacity means a structure blocks X-rays and appears bright white on the image, while radiolucency means it allows X-rays to pass and appears dark. Gutta-percha is the root canal filling material that contains radiopaque additives (such as barium sulfate), so it shows up as a bright white line inside the canal on dental X-rays. This visibility is crucial for confirming root canal length and the quality of obturation. The other options—pulp, soft tissue, and nerve—are soft tissues with little mineral content, so they appear radiolucent (dark) on radiographs.

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