Which One of the Following Is the Main Criterion for Failure

question 22

Multiple Choice

Which one of the following is the main criterion for failure of a high-copper dental amalgam restoration?

• A)Accumulation of black or green tarnish on exposed surfaces
• B)Marginal ditching along occlusal margins
• C)Creep of the restoration out of the cavity preparation in proximal areas
• D)Wear facets along the occlusal contact areas
• E)None of the above

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