RPD LECTURE 2 Flashcards
these connect parts of the prosthetics on one side of the arch to those on the opposite side
MAJOR connectors
should major connectors be flexible or rigid?
you want to them to be rigid to avoid stress on the abutment teeth and damage to the supportive structures
how far away should the borders of MCs beaway form and parallel to the gingival margins?
should be a minimum of 6 mm away from.
where does the posterior limit of the maxillary MCs terminate?
AT or anterior to the vibrating line.
per usual
what angle should the MCs cross the midline?
90 degrees- not diagonally for better patient adaptation and tongue acceptance.
what should the AP width of the anterior posterior strap be?
8 mm
can you use any kennedy classification with A strap max?
yep!
what do you frequently use for a Kennedy class III?
single palatal strap.
8 mm width for ridigidy
-PREFERRED by patients
when should you use a full palate major connector?
if there is remaining abutment tooth on either side is a canine or 1st pre molar. especially in cases with severe vertical ridge resorption
what do you use for a class IV?
U shaped.
not favored.
lacks rigidity= torquing of the abutment teeth
indication for a U shape connector?
large inoperable torus extending posteriorly= can’t place posterior strap
two type of mandibular MCS?
lingual bar and linguoplate
how far below free gingival margin should a lingual bar be?
3 mm below
do patients prefer the lingual bar or the linguolplate?
llingual bar
inferior aspect of the lingual bar has a half pear contour for greatest bulk and rigidity. the bar = ___ mm in vertical height
4 mm
what would be the distance from the FGM to the base of the lingual bar?
7 mm.
4+3
what does the linguoplate need for Class I and II designs?
also add in the terminal occlusal rests or cingulum rests
when do we use lingual plate vs. lingo bar?
when there is NOT 7 mm of vertical height from the FGM to the floor of the mouth or other considerations
indications for linguoplate?
stabilization of periodontally mobile teeth by splinting.
provision for anticipated loss of teeth which may be added to the plate
=space requirement is
connecting link from MC to all other PRDP components such as clasp assemblies, indirect retainers or auxillary rests, denture base
Minor Connectors
where do the minor connectors transfer stresses?
to the abutment teeth and/or underlying supporting tissues
a flat area on a tooth surface (mesial/distal) created to follow the contour of the tooth and define the path of insertion?
Guide Plane
what is the size of the guiding plane?
2-3 mm * 2-3 mm depending on the size of the tooth
guide plate?
the part that engage the guide plane of the TOOTH during insertion and removal
