Complete information related to impression materials.
a. An impression is a _________ reproduction of a given area of the oral cavity.
b. Impression material must be inserted into the mouth while it is too ________
to retain its ________________ .
___________ ___________ carry the impression material to the mouth and
provide a _____________ base to hold it against the tissues until it hardens.
d. Stock trays may be ___________________ for each individual patient.
Describe some requirements for impression material.
a. Impression material should ___________ or be ____________ at a
temperature that will not injure the oral tissue.
b. Impression material should set within _____ to_____ minutes, at body
It must retain an accurate ______________________ when it solidifies and is
withdrawn from the mouth.
d. After solidifying, it must not _________________ when trimmed withh a sharp
knife at room temperature.
Which type of impression material softens when warmed and hardens when
cooled, with no change in chemical makeup?