+
Related Flashcards
Cards In This Set
| Front | Back |
|
Applications for bonding agents
|
-composites
-veneers -tubules |
|
Smear layer def
|
-thin layer of compacted debris on enamel or dentin from the cavity prep process weakly held to the surface.
|
|
Etching def
|
-conditioning
-smear layer removal and production of micro spaces from micro mechanical bonding by dissolving minor amounts of surface hydroxyapatite crystals. |
|
Priming def
|
Micro mechanical bonding to the micro spaces created by the conditioning step
|
|
Bonding
|
Formation of resin layer that connects the prime surface to the overlaying restoration
|
|
Major substrate of bonding agents
|
-BIS-GMA
-UDM or UDMA |
|
Components of bonding systems
|
-conditioning agents
-priming agent -bonding |
|
Conditioning agent that is enamel only
|
Is 37-40% phosphoric acid
|
|
Conditioning agent that is dentin only or enamel and dentin is
|
Polyacrylic acid or citric acid
|
|
Priming agent components are
|
Alcohol or acetone solvent with a light cured monomer
|
|
Bonding components are
|
BIS GMA
UDMA |
|
What is the reaction of bonding
|
Micromechanical retention
|
|
What may chemically alter the bonding agent
|
Water absorption
|
|
Enamel bonding adhesion occurs
|
By macrotags between the enamel rods and microtags into enamel rods
|
|
Dentin bonding adhesion occurs by
|
Removal of smear layer and formatino of microtags into dentin L
|
