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Questions and Answers
Polysulfide material is well-liked by patients because of its pleasant smell.
Polysulfide material is well-liked by patients because of its pleasant smell.
False
High humidity and temperature have no effect on the working time of polysulfide material.
High humidity and temperature have no effect on the working time of polysulfide material.
False
Contemporary polysulfide materials are generally polymerized by lead peroxides.
Contemporary polysulfide materials are generally polymerized by lead peroxides.
False
Copper hydroxide-polymerized polysulfide is light green in color.
Copper hydroxide-polymerized polysulfide is light green in color.
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One of the disadvantages of condensation silicone is its pleasant smell.
One of the disadvantages of condensation silicone is its pleasant smell.
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Dimensional stability of condensation silicone is greater than that of reversible hydrocolloid.
Dimensional stability of condensation silicone is greater than that of reversible hydrocolloid.
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A custom impression tray is not required when using reversible hydrocolloid.
A custom impression tray is not required when using reversible hydrocolloid.
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Polysulfide materials are commonly referred to as rubber bases, which is an accurate description.
Polysulfide materials are commonly referred to as rubber bases, which is an accurate description.
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Polysulfide materials have better dimensional stability and tear strength compared to hydrocolloid materials.
Polysulfide materials have better dimensional stability and tear strength compared to hydrocolloid materials.
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Significant dimensional changes in polysulfide impressions occur if poured more than an hour after making the impression.
Significant dimensional changes in polysulfide impressions occur if poured more than an hour after making the impression.
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A double-mix technique involving heavy-bodied tray material and a syringe material is commonly used with polysulfide impressions.
A double-mix technique involving heavy-bodied tray material and a syringe material is commonly used with polysulfide impressions.
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Polysulfide material has inferior dimensional stability compared to addition silicone.
Polysulfide material has inferior dimensional stability compared to addition silicone.
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Polyether impression material has a polymerization mechanism similar to other elastomers.
Polyether impression material has a polymerization mechanism similar to other elastomers.
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Polysulfide and silicone have a dimensional stability due to the evaporation of alcohol during polymerization.
Polysulfide and silicone have a dimensional stability due to the evaporation of alcohol during polymerization.
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Polyether has a higher thermal expansion compared to polysulfide.
Polyether has a higher thermal expansion compared to polysulfide.
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Polyether impression material forms volatile byproducts during its polymerization.
Polyether impression material forms volatile byproducts during its polymerization.
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Polyether has a longer setting time in the mouth compared to polysulfide.
Polyether has a longer setting time in the mouth compared to polysulfide.
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High dimensional stability of polyether allows accurate casts even when poured immediately after the impression is made.
High dimensional stability of polyether allows accurate casts even when poured immediately after the impression is made.
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