Flashcards in Selection of Dental Biomaterials Deck (14)
Any natural or synthetic material that interfaces with living or biological tissues.
What are the 3 main systems that materials are dispensed as?
- Powder and liquid
- One-paste (light cured)
What is an advantage of using alginate as a material?
Easy to mix
What should we avoid incorporating into material whilst mixing?
Name 2 disadvantages of a powder and liquid system
- May be hard to incorporate all powder
- Hard to avoid air bubbles
Name a disadvantage of a two paste system
Hard to avoid air bubbles
Name a disadvantage of a one paste system
The material is viscous so it can be difficult to pack into a cavity
Name some factors that can affect quality of the set material (4)
- Air bubbles
- Wrong powder:liquid ratio
- Incomplete mixing
- Incorrect mixing time
Heat cured materials have what properties?
Optimum physico-mechanical properties
Room temperature cured materials have what properties?
Have compromised properties compared with heat cured counterparts
Light cured materials have what properties?
Physico-mechanical properties that lie between heat and RT cured materials
List the 5 ideal properties of dental materials
- Mechanically stable
- Chemically resistant
- Dimensionally stable
- Minimal thermal and electrical conductivity
What properties are desirable for an anterior filling material?
- Colour match
- Natural looking in different light conditions
- High compressive strength is not a necessity