RPI Flashcards
What are the 3 components of the RPI?
I bar
Proximal Plate
Mesial Rest
What are the conditions for using RPI?
Distal extensions
The _____is the imaginary line formed by the 2 most distal rests in class 1 and 2 edentulous cases by which the prosthesis rotates on?
Fulcrum Line
What direction does the I bar move in the RPI when the patient bites down?
Mesial and down
What direction does the circumferential clasp move in the case of a distal extension in an RPI when the patient bites down?
Mesial and upward
How wide does the minor connector on the RPI mesial rest need to be?
1.5 mm
Should you break the facial surface of a the tooth in an RPI?
No
Where does the guideplane go on the RPI?
Distal and extends to the lingual of tooth
What are the 2 parts of the RPI that are used in reciprocation?
Minor connector of mesial rest
Lingual portion of proximal plate
How deep does the dip down need to be on the RPI?
3mm
How far from the abutment tooth on an RPI should the approach arm begin?
1 PM tooth
How far from the gingival margin should the superior approach arm?
3mm
How far from the gingival margin should the inferior approach arm?
6mm
The ____ is the area of the i bar that actually touches the tooth in the undercut
Pod
How wide should the pod of the I bar be?
2 mm
