Amalgam Flashcards
What does amalgam consist of
mercruy
tin
copper
What are the 2 types of composition of amalgam
Traditional
Copper enriched amalgam
What are the 2 differerent types of amalgam powder particle types
Lathe cut
Spherical
Advantages of spherical powder particles
Less sens to condensation
Less mercury required
Higher strenth and early compressive strength
easier to carve
What is the benefit of the Y1 phase
good strength and corrosion resistance
What are the disadvantage of the Y2 phase
weak and poor corrosion resistance which weakens margins
What is creep
when a maeterial recieves low level of streses repeatdely over a prolonged period of time resulting in permanent deformation
occurs highly in traditional amalgam
What is the thermal conducitvity and diffisuvity of amalgam
HighH
How can you reduce the corrosion risk of amalgalm
polishing margins
copper enriched amalgam
What are the 2 types of copper enriched amalgam
dispersion modified
single composition
Dispersion modified copper enriched amalgam
2 setting reactions
Ag-Cu spheres and convential lathe cut alloy
Single composition copper eniched amalgam
one setting reaction
coppper integrated into silver tin alloy particles and then mixed with mercury
What are the benefits of single composition copper enriched amaglam
less creep
higher early strength
corrosion reissitance
increased durability of marginsA
Advantages of amalgam
hard
durable
strong
radiopaque
user friendly
less tech sens
Disadvantages of amalgam
aesthetics
mercury toxicity
environmental damage
corrosion
leakage as does not bond
