Dentistry Program Quiz

What is the first step in the manipulation of dental amalgam?

• Selection of alloy

• Polishing

• Condensation

• Carving

Which type of alloy particles have a lower surface area per unit volume?

• Spheroidal

• Mixed

• Spherical

• Lathe-cut

What are the disadvantages of using coarse-cut particles in dental amalgam?

• Fast setting

• High strength restoration

• Difficult amalgamation

• Smoother surface

Which type of amalgam is preferred in case of difficult isolation?

• Zinc containing

• Low copper

• Zinc free

• High copper

What is the purpose of trituration in the manipulation of dental amalgam?

• Packing in the prepared cavity

• Mixing the alloy and mercury

• Polishing the surface

• Carving the restoration

Which technique results in a more uniform and reproducible mix during trituration?

• Mechanical mixing

• Manual mixing

• Under-trituration

• Over-trituration

What is the main objective of condensation in dental amalgam manipulation?

• Poor bonding between increments

• Decrease Hg content

• Reduce strength

• Increase porosity

What occurs if condensation is done after 3 minutes from trituration?

• High creep

• Optimal adaptation

• Excess Hg

• Poor bonding

What is the purpose of carving in the manipulation of dental amalgam?

• Decreasing Hg content

• Increasing porosity

• Removing surface irregularities

• Overfilling the cavity

When should conventional low-copper amalgams be polished after insertion?

• After 24 hours

• Immediately

• After 3 days

• After 1 week