C/C Cram Flashcards
Why is the hamular notch an important site for complete dentures
Site for distal border
Helps with posterior seal
Overextension = pain
Underextension = falls out
Ridge classification (6)
I - Dentate
II - Post XLa
III - Broad alveolar process
IV - Knife edge
V - Flat
VI - Submerged
How long in PERFORM
10m
What is the function of a jaw reg
Determine occlusal plane
Jaw relationship
What is RCP
Most reproducible maxillomandibular relationship
Retruded position of the condyles
FWS calculation
RVD-OVD
Ideally 2-4mm
Lab stages for Replica denture
Primary
Imp taken with stock tray + lab putty
Ask for record block on shellac base
Masters +jaw reg
Of the replica using light bodied PVS
Ask to pour up imps and mount articulator
Trial
Delivery
imp options for C/C
Alginate
Imp compound
Silicone PVS (EXTRUDE)
Polyether (IMPREGUM)
Alginate advantages + disadvantages
Cheap
Easy to use
Elastic
Poor dimensional stability
Not accurate
What kind of material is imp compound vs alginate
Imp - non elastic
Alginate - elastic
Compare silicone + polyether
SILICONE
Dimensionally stable
Hydrophobic
V accurate
POLYETHER
Dimensionally stable
Hydrophilic
V accurate
Compare edentulous vs dentate tray
EDENTULOUS = SHALLOW + NON PERFORATED
What to mark on denture after primary imp
Post dam
Lab card for primary imps
Please pour up U+L primary imps in 50:50 plaster: stone and construct a light cured acrylic special tray (3mm spacing for alginate)
If silicone/polyether 2mm upper spacing 1mm lower
Imp checks
Full coverage of denture bearing area
Full functional depth + width of sulcus
No encroachment on tongue space
Rolled borders
Absence of tears/shine through/airblows
Lab card for master imps
Please pour up U+L master imps in 100% dental stone and provide record blocks on light cured bases for jaw registration
What are the record block adjustments to do before LIMBO
Stability - rock
Retention - anteriorly
Support - occlusally
Extensions - wax knife
Steps of upper block jaw reg
LIIMBO
Lip support
- Nasolabial angle 90-100
- Judge aesthetics + function
Incisal level
- Fricative
- Count from 40-50
- Lick lips + relax
- Ask about show of teeth ideally
Incisal plane
- Foxes bite plane parallel w inter pupillary line
- Mark lipline +high smile line
Midline
- Mark with wax knife
Buccal corridor
- Floss from eye to nose mark that line
Occlusal plane
- Foxes bite plane parallel to alatragal line
Mark post dam say aaaa and located vibrating line
Steps of lower block jaw reg
Check extensions
Lift tongue/displace
Adjust height to lip level
Midline
Work out FWS
Instruments to work out FWS
Use willis bite gauge/callipers
RVD - at rest, say mmmm then relax
OVD - ask pt to bite together
How do we record occlusion
2 v shaped notches into blocks
Patient in RCP
Adhesive
Bite regi paste
Pick shade + mould
Lab card for jaw reg
Please mount casts to regi provided on average value articulator and provide a try in
Tooth shade + mould
Tooth trial checks
OUT OF MOUTH
Trial bases stable on cast
No sharp edges
Extension
Occlusion
AOB/OJ/OB
IN MOUTH
Extension
Retention - pull centrals
Stability - rock
Occlusion
Speech
Aesthetics
What is the desired occlusion for a complete denture?
Contact on both sides when slide side to side
