The working time of elastomeric impression material | AIPGDEE Preparations

The working time of elastomeric impression material is defined as:
A. The time from the start of the mixing till the material is fully set.
B. The time elapsed from beginning of mixing until curing has advanced
C. The time from start of mixing till just before the elastic properties have fully developed
D. The time elapsed from beginning of mixing until reaction is complete.

     Ans. (C) The time from start of mixing till just before the elastic properties have full; developed: Repeat AIPG 2007- Q34: “The working time, begins at the start of mixing & ends just before the elastic properties have developed; must exceed the time required for mixing, filling the syringe &/ or tray, injecting the material on to the tooth preparation, & seating the tray.” Setting time can be described as the time elapsed from the beginning of mixing until curing has advanced sufficiently so that impression can be removed from the mouth with a minimum of distortion.