Treatment Planning Flashcards
How treatment plan for simple restoration?
Know occlusion prior restoration - ICP contact/ RCP contact, is tooth involved in guidance
Most situation want replicated
When may want to change occlusion for simple restoration?
Avoid excursion restored cusp
Change ICP/RCP contact away from restoration-tooth interface
Reintroduce canine guidance
Remove non-working side interference
When canine guidance lost?
Usually result of tooth wear - guidance transfer posterior
How restore canine guidance?
If just restore TSL likely lead restoration failure
Need maintain ICP contact on canine - then restore so only tooth involve working side excursion
When is re-organised approach taken when providing indirect restorations?
If multiple units
Want to incase OVD
Full mouth rehab
When may find issue with providing indirect restoration - what scenario?
Restoring last tooth in the arch
Why is restoring last tooth in arch an issue?
When prepare tooth - space lost
Want maintain ICP contact following prep w/ occlusal stop
What is done with occlusal stop at the lab?
Removed by technician when fabricating the crown - this is then removed prior fit
Prevent loss of space
What does facebow allow the correct positioning of?
The UPPER model - records condyle movement related maxillary teeth
Lower model mounted to upper using interocclusal record
What to assess if doing simple confirmative case?
Assess contact ICP
Assess RCP contact
Assess guidance in excursions
What assess during prep for simple com formative indirect prep?
Sufficient space restorative material
What assess during fit for simple com formative indirect prep?
Check ICP, RCP and excursions - adjust if needed
When is a confirmative indirect restoration case complex?
If have 3+ units
If unit is guiding tooth
What to do if doing complex confirmative indirect case?
Full occlusal analysis
Facebow - cast articulated and analyse
What ideal features of tooth involved in guidance?
Suitable root structure
Enough remaining tooth structure
Ideal features of occlusion on bridge work?
Light contact in ICP on Pontic
Contact in ICP on abutment
AVOID GUIDANCE ON PONTIC
What materials are good to use if tooth in guidance?
Gold
If using PFM what consider?
Metal on guiding surface
What can do if want to replicate guidance form current teeth?
Customised incisal guidance table
What is a customised incisal guidance table?
Allows replicate guidance w/ minimal adjustment
How to use customised incisal guidance table?
Take imp upper arch when happy with guidance Mount model articulator usingg facebow Ask technician construct customised incisal guidance table Prepare teeth Working imp Construct provisional Lab construct using guidance table Fit definitive
What occlusion aiming for if re-organising?
Ideal
ICP=RCP
Forces via long axis of teeth
Lateral excursion - canine guidance w/ no NWS contact
Protrusion - anterior teeth w/ posterior disocclusion
Mutual protection
