Overview of Partials (ORACGUBT) Flashcards
Order of Making a partial
- occlusal analysis
- rotation analysis
- Abutment selection
- clasp selcetion
- guide plane survey
- undercut analysis
- bracing survey
- tripodization
breakdown of occlusal analysis (4)
- plane correction
- extrusion potential
- overbite problem
- spaces selected for PD
*this is the order you evaualte the occlusal plane
breakdown of rotation analysis
- spaces to be restored by the partial?
- size of those spaces?
- support of those spaces?
rotation causes?
torque
torque causes?
tooth loss
what is kennedy classification DETERMINED by?
Occlusal analysis
tipped teeth are more likely to..
torque
lone standing teeth are more likely to …
torque
indirect retention reduces what?
torque
3rd sequence in denture making for partials
abutment selection
breakdown of abutment selection ***
- as many GUIDE PLANES as possible
- as FAR APART as possible
- symmetry WHERE possible
- no INCISORS (
- no lone-standing premolars as primary abutments (ever– due to tipping and root length and shape)
- no lone standing canines or molars if possible (a tooth with a neighbor results in less tipping)
- Extrusion prevention (rest placement on unopposed teeth)
- indirect retention
- esthetics
4th sequence in abutment selection
clasp selection
breakdown of clasp selection
- type 1 vs type 2 clasps
- rotating vs non-rotating partials
- class 1 vs class II levers
examples of type 1 clasps
cast C clasp - non rotating
combo - rotating
examples of type II clasps
RPI clasp(smallest of type II and most perferred)
Bar (DB u/c ) rotating
what can you do for tissue undercuts and bulky teeth? implication on guide planes?
tail down tilt – may draw the tissue closer to analyzing rod and reduce the distance between the approach arm and the tissue
- but the guide planes need to be modified as they become guide points!!!
5 incorrect uses for approach arms – if you do what does it cause?
- double arms
- skipping of teeth
- lingual or palatal
- reverse or distal
- molars
- buccal shelf
- zygomatic arch
will cause TORQUE
where do RPIS go
cuspids and premolars
levers cause…
torque
second clasp levers have the ability to
reduce torque because they push down
the rest ____ to the rotation = the lever
CLOSEST
first three design priorities
- protect TEETH if bone strong
- protect BONE if teeth strong
- if (abutment) teeth weak, treat as Distal Extension w/ RPI
- If bone weak, treat as Distal Extension w/ combo
to protect teeth during rotation what do first three things you use
- use the SMALLEST CLASP possible
- use the MOST FLEXIBLE metal possible
- use the BEST LEVER possible
5th sequence in building a partial
Guide plane survey