A. Air incorporated during mixing B. Improper application of pressure during impression making C. Presence of excessive saliva in impression area D. Due to improper ratio of polymer and monomer
A. 100 ml of water to 60 gms of powder B. 40 ml of water to 40 gms of powder C. 40 ml of water to 15 gms of powder D. 15 ml of water to 40 gms of powder
A. Custom trays facilitate uniform contraction of impression material B. Custom trays require less impression material C. Stock trays may be short in the flange area D. Impressions made n the custom trays are easier to remove from the mouth
