Main purpose of tilting the cast in surveying is to:

 # The main purpose of tilting the cast in surveying is to:

A. Locate the undercuts

B. Locate the line of contour

C. Provide the most desirable path of placement

D. Aid in designing

The correct answer is C. Provide the most desirable path of placement.

Tilting the Cast and Altering the Path of Insertion

Some areas of the tooth may form an undercut only when viewed in a different angle. In such cases, the cast can be tilted on a surveyor so that the path of insertion of the denture is altered and the undercuts are present in relation to the new path of insertion.

The cast can be tilted only to a maximum of 10°, beyond which it is not advisable because the patient will require excessive mouth opening for insertion and removal. Generally, tilting the cast to obtain a retentive undercut is the least sorted procedure and is not advisable in the presence of other alternatives.

Ref: Nallaswamy, 2nd Edition Page No: 402

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