Which material is typically used for final denture bases rather than processing?

Which material is typically used for final denture bases rather than processing?

• A. Chemical cured acrylic for denture processing
• B. Heat-cured acrylic resin for denture bases
• C. Silicone impression material
• D. Polytetrafluoroethylene denture film

Answer: (B)

The material for final denture bases is heat-cured acrylic resin because it polymerizes under heat to a high degree, giving a strong, dimensionally stable base with minimal residual monomer. This provides better long-term strength, wear resistance, and fit in the mouth. Self-cured (chemical-cured) acrylic resin is typically used for processing steps or repairs because it cures at room temperature and is more convenient, but it generally has more residual monomer, greater shrinkage, and lower strength, making it less suitable for the final base. Silicone impression material is used for taking impressions, not for the denture base, and PTFE denture film isn’t used as the base material in standard denture fabrication.

The material for final denture bases is heat-cured acrylic resin because it polymerizes under heat to a high degree, giving a strong, dimensionally stable base with minimal residual monomer. This provides better long-term strength, wear resistance, and fit in the mouth. Self-cured (chemical-cured) acrylic resin is typically used for processing steps or repairs because it cures at room temperature and is more convenient, but it generally has more residual monomer, greater shrinkage, and lower strength, making it less suitable for the final base. Silicone impression material is used for taking impressions, not for the denture base, and PTFE denture film isn’t used as the base material in standard denture fabrication.