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 major connector design for a maxillary RPD covers the least palatal tissue and is indicated when all remaining teeth are anterior?
Answer: U-shaped (horseshoe) connector
The U-shaped (horseshoe) connector is used when all remaining teeth are anterior, though it is the least rigid and should be avoided when possible.
In RPD design, a reciprocal clasp arm is placed to:
Answer: Balance the force exerted by the retentive clasp arm
The reciprocal arm opposes the force of the retentive clasp as it flexes over the height of contour, preventing lateral movement of the abutment tooth.
Denture teeth made of porcelain are preferred over acrylic teeth primarily because they:
Answer: Offer superior wear resistance and hardness
Porcelain teeth resist wear better than acrylic teeth, maintaining occlusal vertical dimension over time despite their brittleness and lack of chemical bonding.
The labial flange thickness and extension of a maxillary complete denture is critical because it directly affects:
Answer: Facial support and lip fullness
The labial flange provides critical support for the upper lip and perioral tissues, restoring lost facial contour after tooth and ridge loss.
A RPI clasp system (Rest, Proximal plate, I-bar) is advantageous for distal extension RPDs because the I-bar:
Answer: Disengages from the undercut during functional loading
The I-bar is designed to disengage from the undercut when the distal extension base moves inferiorly under load, reducing torquing forces on the abutment.
Neutral zone impression technique for complete dentures is used to position artificial teeth in the space where:
Answer: Muscular forces from the tongue and cheeks are balanced
The neutral zone is the area where forces from the tongue are balanced by forces from the lips and cheeks, providing the most stable position for denture teeth.
When processing a complete denture using the compression molding (pack-and-press) technique, a trial closure is performed to:
Answer: Check for even distribution of acrylic and close flash lines
Trial closures confirm even resin distribution throughout the mold and allow excess material (flash) to be trimmed before the final press and processing.