What term describes the process of preparing proximal surfaces on teeth and RPD frameworks?

The term that accurately describes the process of preparing proximal surfaces on teeth and RPD frameworks is guide planes. Guide planes are flat surfaces that are intentionally created on the proximal aspects of teeth and the corresponding framework of the removable partial denture. Their primary purpose is to provide specific guidance during the insertion and removal of the RPD.

Having well-defined guide planes ensures that the prosthesis has a stable fit, which helps to minimize movement during mastication and enhances patient comfort. Additionally, these surfaces help align the denture correctly, contributing to its retention and support. It's a critical aspect of the RPD design because it impacts both the function and the longevity of the restoration.

Other terms like guide plates, contact points, and bonding surfaces do not accurately encompass the specific function of preparing surfaces that aid in guiding the framework into position during the insertion and removal processes, making guide planes the most relevant choice.