What should be done if posterior undercuts prevent RPD placement?

In cases where posterior undercuts pose a challenge to the placement of a removable partial denture (RPD), relieving the tissue surface of the denture base is a crucial corrective measure. This approach focuses on modifying the denture base to allow for proper seating and stabilization without obstructing natural anatomical structures.

By relieving the tissue surface, the RPD can be adjusted to bypass any undercuts, ensuring that the denture can fully engage with the supporting oral tissues. This not only enhances fit and comfort but also improves the overall function and retention of the partial denture during use. Properly relieving the tissue surface helps to prevent potential discomfort or tissue trauma that might occur due to pressure from the denture in areas with undercuts.

Techniques for achieving this relief may include careful adjustments using dental tools or relining materials, which ensure the appliance maintains adequate support while accommodating any anatomical irregularities. This method is particularly effective because it directly addresses the incompatibility created by the undercuts without altering the occlusion or requiring invasive modifications to the remaining teeth or opposing arch.