For making temporary restorations, the impression material preferred is:
The technique involves making a preoperative impression with elastic impression material. Alginate impression materials may be used and are relatively inexpensive. The preoperative impression may be made with polyvinyl siloxane (PVS) impression material, if additional accuracy, stability and durability are required.
Sturdevant operative dentistry 7th Edition, Page No:120
Alginate
Polyvinyl siloxane
Both
None of the above