Pros: Materials Flashcards
ELASTOMERIC MATERIALS
Two types of elastomeric materials ?
Polyethers and addition silicones.
ELASTOMERIC MATERIALS
What setting reaction do elastomeric materials undergo ?
Polymerisation reaction - cross-linking of polymer chains to cause material to turn from fluid to solid.
ELASTOMERIC MATERIALS
What type of material is Impregum ?
Addition cured PVS.
ELASTOMERIC MATERIALS
What is Impregum used for ?
Impressions for indirect restorations - crowns, onlays, inlays, post-cores.
ELASTOMERIC MATERIALS
What are the advantages of Impregum ?
Records undercuts well - good elasticity and high tear strength.
Records fine detail - low wettability and viscosity.
ELASTOMERIC MATERIALS
How is Impregum mixed ?
Base and catalyst in twin cartridge.
ELASTOMERIC MATERIALS
What type of material is Virtual ?
Light body or putty addition silicone material.
ELASTOMERIC MATERIALS
When can Virtual be used ?
Putty matrix for temporary restorations or replicas.
ELASTOMERIC MATERIALS
What type of material is Jetbite ?
Polyvinyl siloxane (PVS).
ELASTOMERIC MATERIALS
What is Jetbite used for ?
Recording occlusion / taking bite registration.
ELASTOMERIC MATERIALS
What is the advantages of Jetbite ?
Fast set time.
Good accuracy.
Stability.
ELASTOMERIC MATERIALS
What are the two active components which cause polymerisation reaction in Jetbite ?
Vinyl polysiloxane polymer (base).
Platinum compound (catalyst).
Cross link to cause solidifcation.
Other components -
Base - filler particles, plasticisers, pigment, stabilisers.
Catalyst - inhibitors and stabilisers.
ALGINATE
What two components react in alginate to cause solidification ?
Sodium alginate and calcium sulphate (Ca ions).
