Rest: A rigid component of a removable partial denture which rests in a 
recessed preparation on the occlusal, lingual or incisal surface of a tooth to 
provide vertical support for the denture. Although a rest is a component of a 
direct retainer (retentive unit, clasp assembly), the rest itself is classified as a 
supporting element due to the nature of its function.

 Classification should follow rather than precede any extractions of teeth 
that might alter the original classification.

The procedures used to resurface the tissue side of a denture with a new material layer, thus producing an accurate adaptation to the denture foundation area. (Minimal to moderate changes).

Acrylic removable partial denture (RPD) is a versatile dental prosthesis that can be 
used to artificially supply teeth and associated structures in a partially edentulous 
arch

Primary impression-making at the first clinical appointment for a patient seeking a removable partial denture. A diagnostic cast with a neat and specific design carefully drawn on it (clinical work).