Which of the following statements about resin base denture bases is true?

Which of the following statements about resin base denture bases is true?

• A. Made of PMMA
• B. Always requires metal framework
• C. Cannot be shaded
• D. Cannot be relined

Answer: (A)

Resin base denture bases are typically made from PMMA because this polymer provides a good balance of esthetics, workability, and repairability. PMMA is biocompatible and processes well to create a natural-appearing pink base that can be finished and polished. It also accepts pigments, so shading to match gingival tissue is possible, which is important for realistic appearance. Additionally, these bases can be relined or repaired chairside if tissue changes occur, maintaining a comfortable fit over time. Because of these properties, they do not always require a metal framework, allowing metal-free designs in many cases. That’s why the statement about being made of PMMA is true, while the other statements are not accurate.

Resin base denture bases are typically made from PMMA because this polymer provides a good balance of esthetics, workability, and repairability. PMMA is biocompatible and processes well to create a natural-appearing pink base that can be finished and polished. It also accepts pigments, so shading to match gingival tissue is possible, which is important for realistic appearance. Additionally, these bases can be relined or repaired chairside if tissue changes occur, maintaining a comfortable fit over time. Because of these properties, they do not always require a metal framework, allowing metal-free designs in many cases. That’s why the statement about being made of PMMA is true, while the other statements are not accurate.