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Most common reason to repeat impression is:

# Most common reason to repeat impression is?
a) Improper positioning of tray
b) Too less or excess material
c) Voids that are irreparable
d) Improper mixing


The correct answer is A. Improper positioning of tray.

The most common reason to repeat an impression is improper positioning of the impression tray. If the tray position is improper, the flange of the impression which lies on the side of deviation will be excessively thick and the flange of the impression opposite to the deviation will be thin.

The other reasons are improper consistency, large voids, movement of the tray during setting and too little or too much impression material.

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