What is the polymerization shrinkage if 3:1 powder: liquid ratio is used____________?
Correct answer: A. 6%
- A. 6%
- B. 8%
- C. 10%
- D. 21%
Explanation
Although pure methyl methacrylate contracts by about 21% on polymerization, a 3:1 powder-to-liquid mix contains much less monomer, reducing the overall shrinkage to approximately 6%.
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