Dental Elastomers: Properties and Challenges

Polysulfide material is well-liked by patients because of its pleasant smell.

High humidity and temperature have no effect on the working time of polysulfide material.

Contemporary polysulfide materials are generally polymerized by lead peroxides.

Copper hydroxide-polymerized polysulfide is light green in color.

One of the disadvantages of condensation silicone is its pleasant smell.

Dimensional stability of condensation silicone is greater than that of reversible hydrocolloid.

A custom impression tray is not required when using reversible hydrocolloid.

Polysulfide materials are commonly referred to as rubber bases, which is an accurate description.

Polysulfide materials have better dimensional stability and tear strength compared to hydrocolloid materials.

Significant dimensional changes in polysulfide impressions occur if poured more than an hour after making the impression.

A double-mix technique involving heavy-bodied tray material and a syringe material is commonly used with polysulfide impressions.

Polysulfide material has inferior dimensional stability compared to addition silicone.

Polyether impression material has a polymerization mechanism similar to other elastomers.

Polysulfide and silicone have a dimensional stability due to the evaporation of alcohol during polymerization.

Polyether has a higher thermal expansion compared to polysulfide.

Polyether impression material forms volatile byproducts during its polymerization.

Polyether has a longer setting time in the mouth compared to polysulfide.

High dimensional stability of polyether allows accurate casts even when poured immediately after the impression is made.