Increase in the residual mercury in silver amalgam filling can_____________?
Correct answer: B. Cause fracture of the filling
- A. Tarnish and corrosion
- B. Cause fracture of the filling
- C. Increase the strength
- D. Decrease condensation pressure
Explanation
Excess residual mercury leaves more unreacted mercury-rich matrix, which weakens amalgam and increases creep, making fracture more likely. It does not strengthen the filling or reduce the required condensation pressure.
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