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Radiographic Interpretation Flashcards

7 cards from real ADEX practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

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  1. A periapical radiograph shows a well-defined, corticated radiolucency at the apex of a tooth that tests vital on pulp testing. What is the most likely diagnosis?

    Answer: Periapical cemento-osseous dysplasia (early stage)

    Early-stage periapical cemento-osseous dysplasia appears as a well-defined radiolucency at the apex of a vital tooth, most commonly affecting mandibular incisors in middle-aged Black women.

  2. What radiographic change is associated with hypercementosis?

    Answer: Bulbous thickening of the root with an intact PDL space and lamina dura

    Hypercementosis appears as a bulbous enlargement of the root due to excess cementum deposition, with the PDL space and lamina dura remaining intact.

  3. Which of the following best describes the radiographic appearance of a dentigerous (follicular) cyst?

    Answer: Well-defined unilocular radiolucency attached at the CEJ surrounding the crown of an impacted tooth

    A dentigerous cyst presents as a well-defined, corticated unilocular radiolucency that attaches at the cemento-enamel junction surrounding the crown of an unerupted tooth.

  4. A bitewing radiograph shows a radiolucency confined to the enamel that does not reach the dentinoenamel junction. This represents which stage of caries?

    Answer: Incipient caries (early enamel caries)

    Incipient caries is limited to the enamel and appears as a small radiolucency that has not penetrated the DEJ on a bitewing radiograph.

  5. What is the radiographic hallmark of a taurodont tooth?

    Answer: Enlarged pulp chamber extending apically with short roots and no constriction at the CEJ level

    Taurodontism is characterized by a vertically enlarged pulp chamber with roots that are shortened and positioned apically, lacking the normal horizontal constriction.

  6. Horizontal bone loss visible on a bitewing radiograph is measured from:

    Answer: The CEJ to the existing alveolar bone crest

    Radiographic bone loss is measured from the CEJ to the existing alveolar bone crest; normal distance is 1.5–2 mm, and greater distances indicate bone loss.

  7. Ghost images on a panoramic radiograph appear on which side relative to the actual structure?

    Answer: On the opposite side of the actual structure and higher

    Ghost images in panoramic radiography appear on the opposite side and higher than the actual structure due to the path of the x-ray beam.