If PIP paste brush marks are still visible on the denture base, what does this indicate?

When brush marks from PIP (Pressure Indicator Paste) are still visible on the denture base, this indicates that there is space between the base and the soft tissue. PIP paste is used to assess the adaptation of the denture base to the underlying soft tissues. A proper adaptation should result in a uniform film of the PIP paste without any distinct marks, suggesting good contact and no gaps.

Visible brush marks imply that the paste was not uniformly compressed, indicating areas where the base is not fully seated against the tissues. This lack of contact can lead to inadequate retention and potential issues with the stability of the denture. Understanding this is crucial for ensuring that the denture fits well and functions properly, as it highlights the need for adjustments to achieve a better adaptation.