Where should the denture base borders be thinned?

The thinning of the denture base borders is essential for creating an appropriate fit and ensuring that the removable partial denture functions well for the patient. The correct choice emphasizes the thinning of areas specifically where there are undercuts and at the anterior border of the posterior denture base.

By concentrating on the areas of anterior undercut, the denture can fit better into the contours of the existing dental arch, enhancing retention. Furthermore, thinning the borders at the anterior edge of the posterior denture base aids in reducing the bulk of the acrylic in this region, allowing for better adaptation to the underlying tissues and improving comfort for the patient.

This targeted approach to border thinning helps to optimize the balance between strength and adaptability of the prosthesis, ensuring it fits securely without causing trauma to the surrounding soft tissue. Thus, the focus on those specific locations is crucial for achieving a functional and comfortable removable partial denture.