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foreign we are going to discuss some of the important mcqs related to elastomeric impression materials so letamp;#39;s begin with the first one the best impression material to be used for securing impression after Crown cutting is agar alginate elastomers or zinc oxide eugenol elastomers is the right answer as elastomers are best for regarding undercuts which of the following impression material can be electroplated without the risk of distortion polysulfides condensation silicon addition silicon or hydrocollide impressions the right answer is polysulphites as we have discussed in the previous video addition silicon is also called tetrethyl silicate condensation silicon polyethers or polyvinyl siloxane the right answer is polyvinyl ciloxane as in addition silicon the base paste consists of vinyl terminated polymer which reacts with silent polymer so addition silicon is also called polyvinyl siloxin the impression material with least dimensional change and can easily be transported to