Partial denture base materials
A removable partial denture (RPD) is a dental prosthesis that replaces one or more teeth and the associated structures of the maxilla or mandible. The prosthesis comprises artificial teeth attached to a base that is supported through contact with the underlying oral tissues or implants and attached to abutment teeth with clasps or precision attachments. The denture base or framework may be fabricated from metal or a resin. Denture teeth are discussed in Chapter 20.
19.1 Metallic RPDs
Most dentists and prosthodontists favor the use of a metal alloy partial denture framework with acrylic resin (PMMA) “gumwork” and either resin or porcelain prosthetic teeth (Figure 19.1). The use of a metal framework ensures the rigidity of the RPD base, reducing the risk of damage from flexure of the denture to the gingival cuff surrounding the abutment teeth.
Metal partial denture frameworks are commonly cast from nickel-chromium />