02: Major Connectors, Minor Connectors, and Rest Seats Flashcards
Principle method for connecting opposing sides of an RPD
Major Connector
This joins smaller component of the RPD to the major connector
Minor connector
This contacts the surace of the abutment tooth to prevent movement of the RPD toward the underlying tissues
Rest
The grasps an abutment tooth and resists removal of the RPD
Clasp assembly
This includes a rest, a retentive arm, and reciprocal arm
circumferential clasp assembly
These clasps approach the undercut from an apical direction
Infrabulge clasps
- Be rigid
- Protect the associated soft tissues
- Provide the means for obtaining indirect retention where indicated.
- Provide a means for placement of one or more denture bases
- Promote patient comfort
Functions of all major connectors
Why is rigidity needed in a major connector
Structural rigidity allows for the broad distribution of applied forces
In the maxillary arch, major connectors should be located how far from the free gingival margins
6 mm
How far should major connectors be from the free gingival margin in the mandible
3 mm
An RPD that is not supported at each end of the edentulous space tends to rotate about a _____
fulcrum
What is used to combat the rotation around the fulcrum?
Indirect retainers, or rests
This Mx Major Connector is a narrow half oval with its thickest point at the center. It is best used for short span class III edentulous spaces.
The bar should not be placed anterior to the second premolar position
Palatal Bar
