Pros Tutorials Flashcards
How does a flabby ridge form?
Complete upper to lower teeth
Forces diverted anteriorly
Upper denture displaces
Excessive+rapid bone loss in maxillary ridge
Replaced by excess fibrous tissue
Flabby ridge formed
How is a flabby ridge managed?
Primary imps taken in alginate
Request special tray with window
Take master imp with medium bodied PVS
Light body on window area (prevents displacement + compression of flabby ridge)
Take 2nd imp of area
Send to lab and ask for record blocks
What is ICP?
Complete intercuspation regardless of condylar position
What is RCP?
Most reproducible jaw relation
Most retruded position of condyle
List some common types of denture fractures (5)
Midline fracture
Clasp fracture
Tooth detaches from base
Loss of flange
Loss of acrylic saddle from CoCr baseplate
Why do dentures fracture?
Impact
Acrylic in thin sections
Work hardening of metal
Parafunctional habits
Occlusion - deep OB
Soft linings
Porosity (processing issue)
Repair of a midline fracture (immediate + delayed)
If pieces can be located together disinfected + send to lab (no impression required)
OR
Chair side cold cure acrylic i
Repair of acrylic flange lost
Imp with denture in situ
Repair of lost acrylic tooth
Self cure acrylic chair side if available
Consideration if acrylic tooth lost multiple times
Occlusion wrong
Repair of poor acrylic to CoCr bond
May need retentive tags to help bonding
4-META to retain acrylic
When are denture strengtheners indicated?
Parafunctional/keep breaking
RPD addition types
Immediate - same day of XLa
Post immediate - tooth XLa later after denture made
Retention - SS clasp added to improve retention
How are RPD additions done clinically
Imp with denture in mouth
Temp fix with self cure acrylic if indicated
Define reline + rebase
Reline
- New base material added to tissue surface to fill space between denture + tissues
Rebase
- Replace entire denture base material
List the types of relines + indications for each
TEMP
- Tissue conditioning for ill fitting immediate
- Replaced every 3 days
SOFT (comfort)
Indications:
- Parafunction, atrophic ridges/cancer pts
- Improved comfort for weeks/months
PERMANENT
- Denture loose otherwise no issues
- Peripheral seal issue or inadequate master imp
Reasons for loose denture
Peripheral seal/inadequate master imp
Why is a silicone reline preferred?
Most successful
No residual monomer
Soft reline vs permanent material
Soft - acrylic or silicone
Permanent - hard acrylic
Function of a tissue conditioner (temp reline)
Shock absorber from masticatory force impact
Promotes healing of underlying inflamed mucosa
Steps for reline construction
Undercuts removed from denture
Wash imp taken closed mouth technique
