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Impression Materials - Coggle Diagram
Impression Materials
Desirable qualities
Accuracy
not affect oral fluids
biologically acceptable
easily manipulated
convenient working time
convenient setting time
accept addition and correction
readily disinfected
Good shelf life
Factors affecting accuracy of the impression materials:
high flow at first
dimensionally accurate
dimensionally stable
high elastic recovery
tray-adherent
compatible with gypsum products
classification
type of setting reaction
reversible
irreversible
their use
edentulous patients
dentulous and edontulous
behavior after setting
non-elastic impression materials
plaster of paris
application
composition
properties
impression compound
properties
accuracy
dimensional accuracy
flow
dimensional stability
non-elasticity
tray-adherant
compatible with model and die materials
conductivity
resoftened and reinserted for corrections
electroplated with copper
application
full-jaw impression
impression trays
Composition
Zinc oxide/ eugenol
properties
accuracy
irritant
accepts addition or corrections
cannot be electroplated
Composition
Application
Manipulation
elastic impression materials
hydrocolloids
general properties
gel strength
dimensional changes after setting
disinfection
compatibility with gypsum
types
reversible
application
composition
manipulation
properties
irrevesible
application
composition
setting mechanism
manipulation
properties
rubber impression
types
polysulfides
Two-base
types
condesation
addition
silicones
Condensation
Addition
polyether
recent advances
alginot
hybrid impression
nano-filled