Restorative & Materials · single question
The highest incidence of secondary caries in Class II restorations occurs at which margin?
Show answer and explanation
Correct answer: D. Gingival proximal
The gingival floor (proximal gingival margin) is the most common site for secondary caries in Class II restorations due to poor access for preparation, condensation, and polishing, microleakage susceptibility, and difficulty for patients to clean.
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