CDT 6 - Restorative techniques for Class I cavities Flashcards
1
Q
amalgam: conventional composition?
A
65% Ag, 29% Sn, 6% Cu, 2% Zn, 3% Hg
2
Q
amalgam classification methods?
A
by composition
-conventional/copper enriched
by alloy morphology
-lathe cut/spherical alloy particles
3
Q
copper enriched amalgam: properties compared to the conventional?
A
superior physical properties
less creep
better corrosion resistance
4
Q
instruments used for occlusal restoration?
A
mirror & probe amalgam condenser/plugger amalgam carrier/gun hollenbach carver excavator burnisher
5
Q
amalgam condensation: why should cavity be overpacked?
A
facilitate removal of Hg rich layer
facilitate anatomical carving
6
Q
why should you avoid over-burnishing?
A
brings Hg to surface
results in impaired properties
7
Q
bonded amalgam restoration: what is the technique of lining?
A
- vitrebond
- acid etch margins
- scotchbond 1
- rely-x ARC
- pack, carve, etc
8
Q
amalgam safety precautions?
A
- training
- avoid spillage
- deal with spillage immediately
- avoid heating amalgam/mercury
- appropriate storage of waste amalgam
- aspiration: when cutting out restorations
