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Guide Plane vs Guiding Plate — NDEB AFK MCQ

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ModerateProsthodonticsGuide Plane vs Guiding PlateNDEB AFK

Which of the following correctly describes the difference between a 'guide plane' and a 'guiding plate' in RPD design?

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Reveal the answer and explanation

Correct answer: E — A guide plane is prepared on the tooth surface; a guiding plate is a component of the RPD framework that contacts the guide plane

A guide plane is a prepared surface on the proximal surface of an abutment tooth (typically 2-3 mm occlusogingivally, parallel to the path of insertion). A guiding plate (proximal plate) is the component of the RPD framework (part of the minor connector) that contacts the guide plane. Together, they direct the RPD along the predetermined path of insertion/removal, provide stabilisation, reciprocation, and some indirect retention.

Reference: Carr – McCracken's Removable Partial Prosthodontics, 13th ed., 2015