Provisional Crown Fabrication Flashcards
7 cards from real EFDA practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Provisional Crown Fabrication flashcards as text
Which of the following best describes the 'indirect' method of provisional crown fabrication?
Answer: The crown is fabricated on a diagnostic cast outside the mouth
The indirect method involves fabricating the provisional on a study model or working cast outside the patient's mouth, reducing intraoral exposure to heat and monomer.
Contour errors on the proximal surfaces of a provisional crown can cause:
Answer: Food impaction and periodontal irritation
Improper proximal contours create open contacts or ledges that trap food, leading to periodontal inflammation and patient discomfort.
A provisional crown shows a 'rocking' motion when seated. This most likely indicates:
Answer: An internal interference or undercut
A rocking motion indicates an internal high spot or undercut preventing complete and stable seating of the provisional crown.
What is the significance of the 'critical zone' (0–3 mm from the gingival margin) on a provisional crown?
Answer: It must be highly polished to prevent plaque accumulation and tissue irritation
The gingival third of the provisional must be smooth and well-polished because surface roughness in this zone promotes bacterial adhesion and gingival inflammation.
If a patient reports that their provisional crown feels 'high' after anesthesia wears off, the EFDA should:
Answer: Reappoint the patient and adjust the occlusion
Occlusal premature contacts cause discomfort and potential damage; the patient must be seen to adjust the occlusion of the provisional.
Which of the following indicates the provisional crown has adequate emergence profile?
Answer: The crown contours support and mimic natural tooth emergence from the tissue
A proper emergence profile replicates the natural tooth shape as it exits the tissue, supporting the gingiva without impinging on it.
What effect does eugenol-containing temporary cement have on subsequent resin bonding for the final restoration?
Answer: It inhibits polymerization of resin-based cements, reducing bond strength
Eugenol is well-documented to inhibit the polymerization of resin-based cements, which can significantly reduce final crown retention.