Which statement about spherical amalgam is true?

Which statement about spherical amalgam is true?

• A. It has lower mercury content
• B. It has higher mercury content
• C. It sets slower than lathe-cut
• D. It has higher initial strength

Answer: (D)

The main idea is how particle shape affects how well the amalgam can be condensed and how the matrix forms early on. Spherical alloy particles pack together more uniformly under condensation, creating a denser mass with fewer voids. That denser, more continuous structure translates into higher initial (early) strength as soon as the amalgam sets. Irregular lathe-cut particles tend to trap microvoids during placement, leading to lower early strength. Mercury content and the overall setting rate depend on formulation, but the standout factor for this statement is the packing and condensation efficiency of spherical particles, which gives the material greater early strength.

The main idea is how particle shape affects how well the amalgam can be condensed and how the matrix forms early on. Spherical alloy particles pack together more uniformly under condensation, creating a denser mass with fewer voids. That denser, more continuous structure translates into higher initial (early) strength as soon as the amalgam sets. Irregular lathe-cut particles tend to trap microvoids during placement, leading to lower early strength. Mercury content and the overall setting rate depend on formulation, but the standout factor for this statement is the packing and condensation efficiency of spherical particles, which gives the material greater early strength.