Polyether impression material

late 1960s

when was polyether impression material developed?

hard

Polyether impression material, exhibits a very [?] consistency

water

Polyether impression material, is [?] absorbent?

mechanical

Polyether impression material, offer the possible combination of better [?] properties than polysulfides

dimensional
silicone

Polyether impression material, offers less [?] change than [?] impression

amine terminated polymer(polyether)
colloidal silica (filler)
glycol ether or phthalate

Composition of Polyether impression material (BASE PASTE)

alkyl aromatic sulfonate
colloidal silica (filler)
plasticizers (glycoether)

Composition of Polyether impression material (ACCELERATOR PASTE)

cross linked rubber

Setting reaction of Polyether impression material

polyether + sulfonic ester → [?]

polyether
sulfonic ester

Setting reaction of Polyether impression material

[?] + [?]→ cross linked rubber

8 min.

Properties of Polyether impression material

Setting time: [?]

30 sec

Properties of Polyether impression material

Mixing time – [?]

dimensional

Properties of Polyether impression material

[?] stability is good.

3%

Properties of Polyether impression material

Decreased flexibility – [?]

true

Properties of Polyether impression material

True or False:

Polyether impression material is Hydrophilic

allergy

Properties of Polyether impression material

Activator paste can produce [?] if handled frequently.

3000gm/cm

Properties of Polyether impression material

Tear strength – [?]

2 yrs

Properties of Polyether impression material

Shelf life > [?]

Short working & setting time
Proven accuracy
Adequate tear strength
Hydrophilic
Long shelf life
Less distortion on removal
Good dimensional stability

Enumerate ALL the advantages of Polyether impression material (x7)

Stiffness requires blocking of undercuts
Slightly more expensive
Multiple casts can’t be poured due to stiffness of the material.

Enumerate ALL the disadvantages of Polyether impression material (x7)

equal

Manipulation of Polyether impression material

[?] length of base & activator paste are taken

manufacturer

Manipulation of Polyether impression material

Paper pad with graduations is provided by [?]

no streak

Manipulation of Polyether impression material

Pastes are mixed till [?] are present.

adhesive
dry

Manipulation of Polyether impression material

Tray coated with tray [?]. Uniform two-layer coat is applied & allowed to [?].

syringe
tray

Manipulation of Polyether impression material

The mixed material can either be taken in a [?] or loaded directly in the [?].

sodium hypocholrite

Disinfection
- Polyether impressions can be disinfected by immerson in [?]

rocking

Considerations for Polyether Material

Material is very stiff, which makes it difficult to remove without [?].

tearing

Considerations for Polyether Material

When removing the impression, break the seal and rock slightly to prevent [?].

water
saliva
blood

Considerations for Polyether Material

[?], [?], and [?] affect polyether material.

moisture

Considerations for Polyether Material

Added [?] will increase the impression’s marginal discrepancy.

absorption
thinning

Considerations for Polyether Material

Increased water [?] occurs if a [?] agent is used.

tear
poor

Considerations for Polyether Material

Has low [?] strength and [?] taste

mixing machine

Considerations for Polyether Material

Need to use [?], hand mix for light

Surflex F
Unilastic
Omniflex

Common brands of Polyether Impression Material (x3)