When Spherical High-Copper Dental Amalgam Alloys Are Contrasted with Admixed

question 19

Multiple Choice

When spherical high-copper dental amalgam alloys are contrasted with admixed dental amalgam alloys,the spherical alloy:

• A) needs approximately 10% more mercury than the admixed alloy for the amalgamation process.
• B) has very little resistance to condensation into the cavity preparation and feels soft compared with an admixed amalgam.
• C) displaces a matrix band and keeps it in contact with the adjacent tooth in class II preparations better than admixed amalgams.
• D) has lower 1-hour and 24-hour compressive strengths than admixed amalgams.

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