What is the survival rate of a conventional bridge at 10 years Flashcards
What is a surveyor?
It is a mechanical device that is used to identify where tissue and tooth undercuts are
What tools do we use alongside a surveryor
- Granite marker
- Chisel
- Undercut gauges
- Analysing rod
What is the initial surveyor used to do
Give us an idea of where the undercuts are without actually drawing onto the model
What do we use the graphite marker to do
Draw the survey line
What is the path of insertion
The path along which the prosthesis moves to go into its final seated position
What is the path of natural displacement?
The path along which a denture is most likely to displace during function
What is the path of withdrawal
Any of the possible paths by which a prosthesis can be removed
What is the relationship between the teeth surfaces and the number of paths of withdrawal
The LESS parallel the 2 tooth surfaces the more possible paths of withdrawal
What are the problems associated with having many paths of withdrawal
The greater the range of paths of withdrawal, the poorer the retention of the prosthesis
What are the parallel teeth surfaces on the abutment teeth called
Guide planes
How long should the vertical height of a guideline be
At least 3mm
What is tooth borne support
Transmission of occlusal forces directed through the roots of the abutment teeth
How can make a denture have tooth borne support
By adding rest seats
How do we prepare a rest seat for a posterior tooth
- Make sure floor is at right angles to the long axis of the tooth
- Rounded proximal margins
- Broadest at the marginal ridge
- Saucer shape
