Retention of Partial Veneer Crown

 # In partial veneer crown, retention can be increased by:
a) Increased length of path of insertion
b) Increase in taper
c) Making path of removal parallel to long axis of adjacent teeth
d) None of the above

The correct answer is A. Increased length of path of insertion.

Crown preparation with long, parallel axial walls and grooves produces maximum retention. Increasing the taper decreases retention. A short, over tapered preparation, decreases the retention because the restoration can be removed along an infinite number of paths.

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