So what is this sandwich technique? Is it associated with the edible sandwiches ?
No!
In fact it is associated with a technique in dentistry. So it looks something like this . Lets see what,why, and how is it used !
- Composite doesn’t bind to the dentin in an adequate manner
- So during polymerization there maybe a gap created
- This gap is created if the margin is near the dentin
How can the bonding be improved ?
- By placing a layer of Glass Ionomer Cement (GIC) between the composite restoration and the dentin.
- The GIC bonds to dentin by chemical adhesion
- And resin bonds mechanically to porosities
- Crazing is seen on the surface of GIC
GIC can be etched with phosphoric acid which helps in retention.
Indications –
- In class 2 composite restoration
- Lesions where one or more margins are in dentin (cervical lesions)
Procedure
source – textbook of dental materials (manapallil), philips, slide share and google images
Dentowesome 