Removable Prosthodontics Flashcards
7 cards from real CDT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Removable Prosthodontics flashcards as text
Which of the following best describes the role of a guide plane in RPD design?
Answer: It is a flat vertical surface prepared on an abutment to direct seating
A guide plane is a flat, parallel surface prepared on the proximal surface of an abutment tooth to control the path of insertion and improve RPD stability.
For a mandibular complete denture, the primary stress-bearing area is:
Answer: The buccal shelf
The buccal shelf, bounded by the external oblique ridge and buccinator muscle, is composed of cortical bone oriented perpendicular to occlusal forces and is the primary support area.
An immediate complete denture is placed:
Answer: On the same appointment that remaining teeth are extracted
Immediate dentures are inserted at the same visit as remaining extractions, allowing the patient to avoid an edentulous period while the ridges heal.
The vertical dimension of rest (VDR) minus the interocclusal rest space (freeway space) equals:
Answer: The occlusal vertical dimension (OVD)
OVD = VDR minus the freeway space (typically 2–4 mm), representing the tooth-to-tooth contact position during maximum intercuspation.
Tissue conditioning materials placed in a denture are changed or relined because they:
Answer: Lose their flow and therapeutic properties over days to weeks
Tissue conditioners (soft liners) gradually stiffen and lose their resilience, requiring replacement every 3–7 days to continue therapeutic remodeling of inflamed tissue.
In complete denture fabrication, gothic arch (needle point) tracing is used primarily to:
Answer: Locate centric relation by identifying the apex of the traced pattern
The apex of the gothic arch trace identifies centric relation — the most retruded repeatable mandibular position — which is then locked into the record bases.
Which alloy is most commonly used for cast RPD frameworks due to its favorable combination of stiffness, strength, and biocompatibility?
Answer: Cobalt-chromium alloy
Cobalt-chromium alloys are the standard for RPD frameworks because they provide high rigidity (important for connectors), strength, corrosion resistance, and lower cost than gold.