Restorative & Materials · single question
A radiograph shows a radiolucent image under an existing restoration. What is the most likely diagnosis?
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Correct answer: A. Recurrent (secondary) caries
✓ A) Recurrent caries is correct.
A radiolucent zone between a restoration and the tooth structure is the classic radiographic sign of recurrent (secondary) caries — caries that develops at the margins of an existing restoration. Differential considerations: secondary caries vs. residual caries (left during previous preparation) vs. radiolucent restorative material (composite appears radiolucent). The clinical context of a radiolucent area UNDER a restoration = recurrent caries until proven otherwise. This requires replacement/repair of the restoration with caries removal.
A radiolucent zone between a restoration and the tooth structure is the classic radiographic sign of recurrent (secondary) caries — caries that develops at the margins of an existing restoration. Differential considerations: secondary caries vs. residual caries (left during previous preparation) vs. radiolucent restorative material (composite appears radiolucent). The clinical context of a radiolucent area UNDER a restoration = recurrent caries until proven otherwise. This requires replacement/repair of the restoration with caries removal.
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