Which material is commonly used for RPD frameworks?

The most suitable material for Removable Partial Denture (RPD) frameworks is a combination of chromium-cobalt alloy or acrylic resin. Chromium-cobalt alloy is favored for frameworks due to its strength, durability, and resistance to corrosion. This material provides a rigid support structure for the prosthesis and is well-suited for the stresses encountered in the oral environment. Additionally, chromium-cobalt alloys have a lower profile, allowing for a more comfortable fit and improved aesthetics compared to some thicker materials.

Acrylic resin, while often used in RPDs, is primarily utilized for the base and denture teeth rather than the framework itself. Its ease of handling and ability to adjust make it popular, but it lacks the structural integrity needed for the framework. The combination of these materials allows for a balance of strength and patient comfort, making it the preferred choice in practice.

The other materials listed, such as gold alloy and plastic materials, do not provide the same level of performance in terms of strength and durability required for the framework. Gold alloys, while desirable for their biocompatibility and aesthetic qualities, are often more expensive and not as commonly used as chromium-cobalt alloys in RPD frameworks. Plastic materials lack the necessary rigidity and resilience required for a