Which material is softer (more monomer), less color stable, and porous, and is used for denture processing?

Which material is softer (more monomer), less color stable, and porous, and is used for denture processing?

• A. Chemical cured acrylic for denture processing
• B. Heat-cured acrylic resin for denture bases
• C. Porcelain denture teeth
• D. Silicone soft liner

Answer: (A)

When a denture base is being formed, the material that is used during processing is often a chemically cured resin that sets at room temperature. This type of resin tends to have more residual monomer left after polymerization. That monomer acts as a plasticizer, making the material softer and more flexible, which also leads to increased porosity. The higher residual monomer and porous structure contribute to poorer color stability compared with heat-cured resins, which stay harder and more color-stable. In contrast, heat-cured acrylic resin undergoes more complete polymerization with heat, resulting in a harder, less porous, and more color-stable final denture base. Porcelain denture teeth are rigid and nonporous, not used for processing the denture base, and silicone soft liners are meant for cushioning inside a denture, not processing the base material. So, the resin that is softer, more monomer-rich, and porous, and is used during processing, is the chemically cured acrylic resin for denture processing.

When a denture base is being formed, the material that is used during processing is often a chemically cured resin that sets at room temperature. This type of resin tends to have more residual monomer left after polymerization. That monomer acts as a plasticizer, making the material softer and more flexible, which also leads to increased porosity. The higher residual monomer and porous structure contribute to poorer color stability compared with heat-cured resins, which stay harder and more color-stable.

In contrast, heat-cured acrylic resin undergoes more complete polymerization with heat, resulting in a harder, less porous, and more color-stable final denture base. Porcelain denture teeth are rigid and nonporous, not used for processing the denture base, and silicone soft liners are meant for cushioning inside a denture, not processing the base material.

So, the resin that is softer, more monomer-rich, and porous, and is used during processing, is the chemically cured acrylic resin for denture processing.