What condition might lead to occlusal disharmony in removable partial denture wearers?

The condition that can lead to occlusal disharmony in removable partial denture wearers is insufficient occlusal vertical dimension (OVD). OVD refers to the space between the upper and lower arches when the teeth are in centric occlusion. If the OVD is inadequate, it can affect the relationship between the upper and lower jaw, leading to misalignments in the bite. This can cause discomfort, alter jaw function, and lead to difficulties in chewing or speaking.

Insufficient OVD can result from various factors, such as wear of existing teeth or improper fabrication or adjustment of the RPD. When the dimension is not properly maintained, it can lead to a situation where occlusal forces are distributed unevenly, contributing to muscle strain, joint problems, or increased wear on the remaining natural dentition.

This understanding is critical for the design and adjustment of RPDs to ensure that the vertical dimension is properly established, enhancing function and comfort for the wearer.