Prosthodontics and Operative Dentistry Flashcards
7 cards from real NBDE practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Prosthodontics and Operative Dentistry flashcards as text
The major connector for a maxillary removable partial denture should be located at least how far from the free gingival margin?
Answer: 6 mm
The major connector must be placed at least 6 mm from the free gingival margin to avoid impingement on gingival tissue.
Which material demonstrates the highest fracture toughness among current all-ceramic crown systems?
Answer: Zirconia (Y-TZP)
Zirconia (yttria-stabilized tetragonal zirconia polycrystal) has the highest fracture toughness of current all-ceramic materials due to transformation toughening.
In operative dentistry, the term 'convenience form' refers to:
Answer: The shape that allows access for instruments and insertion of the restoration
Convenience form involves modifications to the cavity preparation that allow adequate access for instruments and proper placement of the restorative material.
The retentive arm of a circumferential clasp for a removable partial denture engages the undercut at what relationship to the height of contour?
Answer: Below the height of contour
The retentive tip of the clasp must be positioned below the height of contour (in the undercut zone) to provide retention through clasp flexion.
When evaluating a patient for implant-supported prosthetics, the minimum bone height required above the inferior alveolar canal for a standard implant is:
Answer: 10 mm
A minimum of 10 mm of bone height above the inferior alveolar canal is generally required for safe placement of a standard-length dental implant.
Composite resin polymerization shrinkage is most effectively reduced by:
Answer: Incremental placement technique
Incremental layering (2 mm or less per increment) limits the volume of composite curing at once and allows each increment to direct stress away from cavity walls.
The function of the indirect retainer in a removable partial denture is to:
Answer: Resist rotation of the denture away from the tissue on the distal extension side
The indirect retainer acts as a fulcrum point anterior to the direct retainers, resisting the rotational (lifting) movement of the distal extension base.