Introduction
A removable partial denture (RPD) replaces missing teeth for a partially edentulous patient who can't have, or doesn't want, a bridge. The patient takes it out and puts it back without help. It restores chewing, speech and appearance, and stops the remaining teeth drifting into the gaps.
Kennedy classification
Partially edentulous arches are grouped by where the gaps are, because this decides how the denture is supported.
Additional gaps are modification spaces (e.g. Class II, modification 1). The most posterior gap decides the class, and the arch is classified after any planned extractions.
Major connectors
Requirements of major connectors
- Rigid, so forces are spread across the arch.
- Don't impinge on the gingiva or movable tissues; relieved over tori and the median raphe.
- Don't trap food or interfere with the tongue.
- Made of a biocompatible alloy; smooth and comfortable.