Restorative & Materials · single question
What is the MOST common cause of resin (composite) restoration failure?
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Correct answer: C. Recurrent caries
✓ C) Recurrent caries is the most common cause.
Recurrent (secondary) caries developing at the margins of composite restorations is consistently cited as the most common reason for replacement. Microleakage at the restoration-tooth interface allows bacterial penetration and caries development, especially in patients with poor oral hygiene or high caries risk. While fracture, wear, and discoloration do occur, recurrent caries at the margins is the #1 reason restorations fail clinically and need replacement. This underscores the importance of marginal integrity and polish in composite restorations.
Recurrent (secondary) caries developing at the margins of composite restorations is consistently cited as the most common reason for replacement. Microleakage at the restoration-tooth interface allows bacterial penetration and caries development, especially in patients with poor oral hygiene or high caries risk. While fracture, wear, and discoloration do occur, recurrent caries at the margins is the #1 reason restorations fail clinically and need replacement. This underscores the importance of marginal integrity and polish in composite restorations.
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