Elastomers for Final Impressions

Odor (sulfur)

Characteristic smell associated with polysulfide impression material.

Custom Tray

A personalized tray for making impressions, designed to ensure uniform thickness.

Polysulfide

Setting time of 8-14 minutes.

Hydrophobic

Refers to materials like polysulfide that repel water.

Polyether

Impression material that is more hydrophilic and has a setting time of 4-6 minutes.

Polyether

____ impressions can be poured repeatedly for up to 1 week.

Polyvinyl siloxane (Addition Silicone)

Impression material with the smallest dimensional change and high elastic recovery.

Polyvinyl siloxane

Setting time of 2-6 minutes.

Dimensional Stability of Polyvinyl Siloxane

Dimensionally stable for up to 1 week.

Light-bodied

Refers to a type of elastomeric impression material that is syringe type or wash type.

Heavy-bodied

A thicker elastomeric impression material used for trays.

Elastomeric impression materials

Materials that offer superior accuracy in capturing fine details due to high elastic recovery and minimal dimensional change.

Forms of Elastomeric Impression Materials

Includes light-bodied, regular, heavy-bodied or putty forms.

Polyvinyl siloxane (Addition Silicone)

› C&B
› Smallest dimensional change
› High elastic recovery
› May be poured several times
› Dimensionally stable for 1 week
› Setting time: 2-6 mins

Condensation Silicone

> High dimensional
instability
> Ethyl alcohol
evaporation

Polyether

› More hydrophilic
› Setting time: 4-6 mins
› May be poured
repeatedly for up to 1
week

polysulfide (elastomer)

› Odor (sulfur)
› Pour same day
› Final Denture Impressions
› Custom Tray
- Uniform thickness
› 2 paste
-Dispensed in = lengths
› Hydrophobic
› Setting time: 8-14 mins
› Stains
› Cheaper

polysulfide

Used for custom trays and final denture impressions