An RPD is a dental prosthesis that restores _______ of the natural teeth and/or associated parts and is supported by teeth and/or mucosa and can be removed from the mouth and replaced at will
One or more but not all
What are the objectives of an RPD? (6)
- Restore anatomical defect
- Restore function
- Restore occlusal plane
- Proved posterior occlusal support
- Improve esthetics
- Splint periodontally compromised teeth
List the components of the metal framework portion of an RPD: (5)
- major connector
- minor connectors
- rests
- direct retainers
- indirect retainers
List the components of the denture base portion of an RPD: (2)
- replacement teeth
- supporting base material
Label the parts of the RPD in the following image:
A) proximal plate
B) minor connector
C) proximal plate
D) denture base connector
E) major connectors
F) rest
G) retainer
The component of an RPD that joins the units on one side of the dental arch with units on the opposite side:
Major connector
The following images show:
Major connector
List types of major connectors in a maxillary RPD: (4)
- palatal strap
- anterio-posterior palatal strap
- complete palate
- U-shaped (horseshoe) connector
List the type of major connectors in na mandibular RPD: (2)
- Lingual bar
- Lingual plate
The connecting link between the major connector or base of an RPD and the other units of the prosthesis, such as direct and indirect retainers and rests:
Minor connector
List the three types of minor connectors in an RPD:
- Guiding plane plates
- Meshwork - to hold acrylic resin
- Any unit connecting any type of rest to the major connector
What type of major connector is seen in the following image of a mandibular RPD?
Lingual bar
What type of major connector is seen in the following image of a mandibular RPD?
Lingual plate
A component of an RPD that serves to transfer forces occurring against the prosthesis down the long axis of the abutment teeth:
Rest
The prepared surface of a tooth or restoration to receive the rest, not a part of framework:
Rest seat
A rigid extension from the major connector or base; contacts the proximal surface of an abutment tooth:
Proximal plate
What component of the RPD is represented by the arrow in the following image?
Proximal plate
A component of an RPD used to retain & prevent dislodgment:
Direct retainers
Two arms or other pieces, joined by a body which may connect a rest; may act as a retainer or stabilizer:
Direct retainer- clasp assembly
A component of an RPD that assists a direct retainer(s) in preventing displacement of distal extension denture base by functioning through lever action on the opposite side of the fulcrum line:
Indirect retainers
Usually connects to a major connector and is some form of rest:
Indirect retainers
Indirect retainers are ALWAY necessary in:
Class I or II situations
Part of the RPD that rests on the foundation tissues and to which teeth are attached:
Denture base
The denture base component of the RPD may be _____ or _____
Polymer/plastic or metal
