Part II 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 Part II flashcards as text
Which of the following best describes the mechanism of action of fluoride in caries prevention?
Answer: It forms fluorapatite, which is more resistant to acid dissolution than hydroxyapatite
Fluoride substitutes for hydroxyl groups in hydroxyapatite to form fluorapatite, which has a lower critical pH and is significantly more resistant to acid dissolution.
A 55-year-old edentulous patient needs complete dentures. Which jaw relation record is taken first during the construction sequence?
Answer: Vertical dimension of occlusion
Vertical dimension of occlusion (VDO) must be established before centric relation can be recorded, as the correct jaw separation is needed to make a reproducible record.
Furcation involvement classified as Class II (Glickman) means:
Answer: The probe enters the furcation but does not pass through
Glickman Class II furcation involvement means the horizontal probe enters the furcation entrance but does not pass to the other side.
When taking a periapical radiograph using paralleling technique, the primary benefit over bisecting angle is:
Answer: Reduced distortion and more accurate representation of tooth length
The paralleling technique places the film parallel to the tooth's long axis, minimizing geometric distortion and providing accurate tooth length and bone level readings.
A patient on warfarin therapy requires a simple extraction. Their INR is 2.3. The correct management is:
Answer: Proceed with extraction using local hemostatic measures
An INR ≤3.5 is acceptable for simple dental extractions; local hemostatic measures (gelatin sponge, pressure) are sufficient without altering anticoagulant therapy.
In removable partial denture design, which component provides indirect retention?
Answer: Rest on the abutment tooth
An occlusal rest placed on the opposite side of the fulcrum line from the extension base provides indirect retention by preventing the denture base from rotating away from the tissue.
Which suture material is preferred for intraoral use because it resorbs without requiring removal?
Answer: Polyglycolic acid (Vicryl)
Polyglycolic acid (Vicryl) is a synthetic absorbable suture that hydrolyzes over 60–90 days and is widely used intraorally to eliminate the need for suture removal.