# In primary impression, the stock tray should be _________ mm larger than ridge.
A. 2 mm
B. 4 mm
C. 6 mm
D. 8 mm
The correct answer is C. 6 mm.
If the tray is too large, it will distort the tissues around the borders of impression. If it is too small, the border tissues will collapse inward onto the residual ridge and thus reduce the support for the dentures.
# The Bennett movement exerts its greatest influence in:
A. Lateral movement
B. Protrusive movement
C. Opening movement
D. Closing movement
The correct answer is A. Lateral movement.
Bennett movement is a lateral jaw movement demarcated by movement of balancfng side condyle. It is brought about by lateral pterygoid as it is attacked to neck of condyle and the capsule.