polyether impression material (copy)
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19 Terms
1960s
when was polyether impression developed
very hard
consistency of polyether material
mechanical properties
polyether offers the possible combination of BETTTER [?] than polysulfides
less dimensional change
polyether offers [?] than silicone impression
base paste and accelerator paste
composition of polyether impression material
→ amine terminated polymer(polyether)
→ colloidal silica (filler)
→ glycol ether or phthalate
composition of base paste
→ alkyl aromatic sulfonate
→ colloidal silica (filler)
→ plasticizers (glycoether)
composition of accelerator paste
colloidal silica
filler of base paste
colloidal silica
filler of accelerator paste
SETTING TIME |
MIXING TIME |
DIMESIONAL STABILITY |
DECREASED FLEXIBILITY |
HYDROPHILIC |
ACTIVATOR PASTE |
TEAR STRENGTH |
SHELF LIFE |
PROPERTIES of polyether
8 min
setting time of polyether
30 secs
mixing time of polyether
good
dimensional stability of polyether
3%
decreased flexibility of polyether
can interact with water
what does hydrophilic mean
activator paste
can produce allergy if handled frequently
allergy
activator paste can produce [?] if handled frequently
3000gm/cm
tear strength of polyether
> 2 years
shelf like of polyether
