4 Flashcards
(14 cards)
Cast I circumferential clasps in kennedy class I arch forms
class I lever.
Three clasp choices for kennedy class I and II arches
RPI, RPA, wrought iron clasp
I bars contraindicated
Bony undercut
Frenum attachment, insufficient vestibule depth
Lack of facial undercut
Insufficient vestibular depth
Indications for wrought clasp
Better for reduced perio
Problems: extra work to make, flexible so acrylic can break and be distorted.
Which components provide reciprocation for the RPI clasp
Guide plate, minor connector
How wide is the prox plate for an RPI clasp
2-3mm
HOw far should the approach arm extend from free gingival margin before it extends in a distal direction
back to 1st horizontal strut
Where does the I-bar originate from the framework
1st horizontal sstrut
Purpose and best location for indirect retainer
prevent lifting of posterior denture
External finishing line purpose
acrylic bindding
Placing lingual bar too far (greater than 5mm) from FGM may
encroucch on FOM
Where is the RPA retentive clasp located relative to HOC
below
What components provide reciprocation for the RPA clasp
minor connectors
Combination clasp
chromecobalt on lingual, wrought on facial (stainless steel)
