TUT 5 Flashcards
Additions and repairs
What commonly causes a midline denture fracture?
Bruxist
What commonly causes a tooth to detach from a denture?
Occlusal problem
What commonly causes the loss of a flange?
Dropped
What commonly causes an acrylic saddle to detach from CoCr baseplate?
Bonded components
What commonly causes a clasp to fracture or bend?
Repeated use and deep undercuts
Why do dentures fracture?
- impact
- acrylic in thin section
- work hardening of metal
- parafunctional habits
- occlusion (deep OB)
- soft linings
- porosity from processing
- bonding of different components
What is considered a simple repair?
- all pieces present
- pieces can be located together
How do you complete a simple repair?
- no appointment necessary
- disinfect and send dentures to lab
- no impression required
How do you fix a denture with a piece missing?
Take impression in mouth with denture in situ and send to lab
How do you fix a missing acrylic tooth?
- if patient has tooth no impression or appointment required
- if patient does not have tooth must communicate with lab as may be difficult to match shade and mould
What can be added to dentures to improve strength?
- wire mesh
- glass fibre mesh
- stainless steel wire in lower
What are the different types of denture addition?
- immediate
- post-immediate
- retention
What is an immediate addition?
- when a tooth is lost after denture construction and tooth is added on day of extraction
- impression with denture in place and tooth to be extracted
What is a post-immediate addition?
- when a tooth is lost after denture construction and tooth is added at a later date
- impression with denture in place and extraction socket
What is a retention addition?
When denture retention is inadequate a clasp is added to improve retention (wrought stainless steel to acrylic denture)
