Lecture on RPD Construction and Surveying Techniques

These flashcards cover important terminology and definitions related to the construction of removable partial dentures (RPD) and the use of surveying techniques.

Surveyor

An instrument used to determine relative parallelism of two or more tooth surfaces or parts of a cast in dental arches.

Primary impression

The initial impression taken to create a diagnostic cast.

Secondary impression

An impression taken after mouth preparation to create a master cast.

Path of insertion

The angle by which the rigid part of a removable partial denture (RPD) is set over the abutments until the denture base contacts the tissues.

Undercut gauge

A tool used to measure the extent of undercut for clasp retention, typically available in sizes of 0.01, 0.02, and 0.03 inches.

Guiding planes

The parallel surfaces on proximal teeth that the proximal plate of the RPD fits against to guide insertion and removal.

Tripoding

The process of recording the final tilt of a diagnostic cast for accurate repositioning during the fabrication of a master cast.

Flasking

The process of enclosing the master cast with material to facilitate the removal of the casting after it hardens.

Analyzing rod

A rigid, cylindrical metal tool used to select the path of insertion and determine relative parallelism of proximal surfaces.

Carbon marker

A tool used to mark the survey line on a cast, indicating maximum height of contour.