What does a 'Stop' refer to in RPD fabrication?

In the context of removable partial denture (RPD) fabrication, a 'Stop' refers to a defined area that limits the movement of the denture. This is crucial for maintaining stability and proper fit during function. The stops are strategically placed on the residual ridge or undercuts of the dental arch, ensuring that the denture does not shift out of alignment during mastication or other movements.

Having these defined stops helps in achieving an accurate adaptation of the denture to the underlying hard and soft tissues, which is essential for patient comfort and effective chewing. By controlling the movement of the prosthesis, stops also play a significant role in preventing tissue damage and ensuring the long-term success of the denture.

The other options, while related to various aspects of denture design, do not accurately describe the purpose of a 'Stop' in RPD fabrication.