T5: Repairs Flashcards
1
Q
Common types of denture fracture
A
- midline
- tooth detached from denture base
- loss of flange
- acrylic saddle detached from CoCr baseplate
- clasps fracture
2
Q
Why do denture fracture?
A
- impact
- acrylic in thin section
- work hardening of metal
- parafunctional habits
- occlusion: deep overbite
- soft linings
- denture processing problem: porosity
- bonding between tooth and base acrylic/ acrylic and CoCr
3
Q
Midline fracture of complete denture
A
- if fractured pieces can be located together
- disinfect and send to lab
- no impression needed
- cast poured
- fractured area removed and new acrylic processed
4
Q
Pieces of denture missing
A
Part of acrylic flange lost
- impression taken with fractured denture in mouth
- disinfect
- cast poured
- new acrylic processed into defect
5
Q
Loss of acrylic tooth
A
- easy if tooth debonded and pt has the tooth
- tricky if tooth is lost
- if its a repeat failure, then may need to redesign prosthesis
6
Q
Fracture of Acrylic- CoCr
A
- may need to add retentive tag
- solder on tags
- use 4-META/ silicoat CoCr to retain acrylic on CoCr
7
Q
Temporary repairs
A
- self- cure acrylic
- cyanoacrylate glue
- usually chairside
8
Q
Use of strengtheners in denture repairs
A
- wire mesh
- glass- fibre mesh
- stainless steel wire
