The restoration which shows percolation and shrinkage along the margins is_____________?
Correct answer: B. Unfilled resins
- A. Composites
- B. Unfilled resins
- C. Amalgam
- D. Polycarboxylate
Explanation
Unfilled resin undergoes marked polymerization shrinkage because it contains a high proportion of monomer, leaving marginal gaps that permit percolation. Composites shrink less because their inorganic filler reduces the resin content.
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