What To Use And Where? Flashcards
What use for MCC? Why?
GIC or RMGIC
Can bond to the metal via acid base reaction
What use for metal post?
GIC
What use for fibre post?>
Dual cure composite + DBA
Or
Self adhesive composite
What use for veneer? why?
Light cure composite + DBA
Wont use GIC’s due to poor aesthetics, poorer mechanical properties, and decreased bond strength vs resin cements
What use for adhesive bridge? Why?
Anaerobic cure composite
High bond strength and can bond to enamel and dentine
They are very insoluble
Ease of use
Range of shades so good aesthetics
What use for zirconia crown?
GIC, RMGIC
Dual cure composite + DBA
Anaerobic cure composite
Self adhesive composite
What use for composite inlay?
Dual cure composite + DBA
Self adhesive composite
What use for porcelain inlay?
Dual cure composite + DBA
Self adhesive composite
What use for gold restoration?
GIC or RMGIC
How do composite resins bond to enamel and dentine?
Via a dentine bonding agent and also micro mechanical bonding via etching
OH groups on resin hydrogen bond with DBA
Carboxyl groups ionic or covalent bond to DBA
The DBA infiltrates dentinal tubules or enamel and creates resin tag for adhesion
How do self adhesive composites bond to tooth surfaces?
they contain a self etching monomer
Composite applied to tooth and the acidic self etching monomer reacts with the hydroxyapatite
Micro mechanical bond formed
Composite is then polymerised
(Not as strong bond as conventional composites)
How does GIC and RMGIC bond to tooth surfaces?
On dissolution, the escaping calcium and phosphate ions from tooth exchange with aluminium, silica and fluoride ions from silica powder
This causes an ionic bond
How does GIC bond to metal?
Acid base
Acid group in GIC bond to metal oxide to give salt and water
Salt react with acid groups to form chemical bond to the metal
