Fixed Pros theory Flashcards
What is Take One putty made from?
What precautions need to be undertaken?
PVS (Polyvinyl siloxane)
Wear non-latex gloves (latex inhibits setting reaction)
Which is more biocompatible and why: ceramic or CR?
Ceramic, as it is less porous so it traps less plaque.
True or false: You should only bond veneers to enamel.
True (therefore if there isn’t enough enamel to bond to, veneers unsuitable)
What is the difference between an onlay vs. inlay?
If there is cuspal coverage then it’s an onlay.
NOTE: Both are indirect restorations.
What are the FIVE governing principles of crown prep?
- Preservation of tooth structure
- Retention and resistance form
- Structural durability
- Marginal integrity
- Preservation of the periodontium
What are FOUR reasons why walls are tapered and not completely parallel during crown prep?
- Able to visualise all margins
- Prevent undercuts
- Allow for inaccuracies in fabrication process
- Ease of insertion
What is the purpose of a special tray?
To keep equal thickness of impression material around prep (due to different thicknesses have variable shrinkage)
What are SEVEN reasons for a temporary crown?
- Pulpal protection
- Prevent sensitivity
- Protect preparation
- Aesthetics
- Prevent drifting
- Prevent overeruption
- Function
