Question

Polycarboxylate cement may be used as a base

material beneath a metallic restoration because
A. its thermal conductivity is similar to dentin and
enamel.
B. its thermal diffusivity is similar to dentin and
enamel.
C. its compressive strength when set will resist
forces of condensation.
D. All of the above.

Answer 1

Polycarboxylate cement is suitable as a base beneath metallic restorations because it shares similar thermal properties with dentin and enamel, and it has sufficient compressive strength to withstand the forces applied during the placement of the restoration.

Step-by-step explanation:

Polycarboxylate cement may be used as a base material beneath a metallic restoration for several reasons, all contributing to its suitability for this purpose:

• Thermal conductivity is similar to that of dentin and enamel, helping to reduce thermal stress on the tooth when temperatures in the mouth change.
• Thermal diffusivity is similar to dentin and enamel, allowing for the dissipation of heat or cold at rates similar to the natural tooth structure.
• Compressive strength when set is capable of resisting the forces of condensation applied during the placement of the metallic restoration.

Therefore, the answer is D. All of the above.