Revision Conventional Complete Dentures Flashcards
Clinical Stage 1
Clinical: Primary Impression
Lab: Primary cast & special trays
- take primary impression using stock trays
- disinfect
- take to lab
Close fitting tray
- used if there is resorbed ridge
- normally 2-3mm spacer but resorbed ridge need close fitting
Clinical stage 2
Clinical: Master Impression
Lab: Master casts & Record Blocks
- disinfect
- master impression on special tray
- mark postdam
- disinfect imp
- take to lab with prescription
Clinical stage 3
Clinical: Jaw registration
Lab: Mount cast and set up
- disinfect
- register occlusion (choose shade, setting & mould)
- disinfect registered blocks
- take to lab
How to do jaw reg
- put in upper block
- get anterior plane (interpupillary line)correct and posterior occlusal plane (ala tragus line)
- use Fox’s bite plane
- mark centreline, canine line
- put in lower block
- need to look at profile of block
- horizontal and vertical component- guide the pt into a retruded position
- ensure sufficient FWS
- use Willis bite gauge
- use jaw registration paste to register occlusion
When to use cuspless teeth?
- When pt cannot get into occlusion as easy
- resorbed ridges
Setting teeth in Lab
Clinical stage 4
Clinical: Try in
Lab: Process dentures
- try in checks
- re-register/ make changes of shade/ mould
Try in Checks
- vertical dimension of occlusion
- even contact in retruded contact position
- lip support
- occlusal planes: A/P
- lower teeth over ridge
- speech
- retention & stability
- base extensions
- appearance
Finishing up dentures in Lab
- wax up
- flasking
- deflasking
- trim and polish dentures
Clinical Stage 5
- insertion / delivery
Insert checks
- vertical dimension
- even contact in RCP
- speech
- retention & stability
- base extensions
- appearance
- comfort
Clinical Stage 6
Review
Review checks
- pain/ redness/ ulceration
- function
- aesthetics
- speech
- recheck occlusion/ vertical dimension
Replica vs Conventional
Replica
- keeps existing design easier to adapt
- maintain existing aesthetics
- 1 less clinical stage
- simpler jaw reg
- only 1 imp in mouth
- major modifications difficult -> can reproduce faults
- easier to observe changes to original
Conventional
- use if no previous denture/ previous one is poor
- can change aesthetics significantly as start from scratch
- takes longer
- jaw reg complex
- 2 imp stages in mouth
- can make major modifications
- good if there is significant ridge resorption
