Practice Test Geeks(EFDA) Expanded Function Dental Auxiliary Practice Test
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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

  1. A patient returns with a loose provisional crown 3 days after placement. After recementing, which factor should be evaluated FIRST?

    Answer: Occlusal contacts and parafunction habits

    Repeated loosening of a provisional is most often caused by occlusal forces or parafunctional habits such as bruxism that exceed the retention of temporary cement.

  2. During the 'remove and reline' phase of direct provisional fabrication, when should the initial shell be removed from the mouth?

    Answer: During the rubbery or doughy stage, before final set

    Removing the shell during the rubbery stage prevents locking into undercuts while preserving the shape needed for the final reline.

  3. Which statement about PMMA shrinkage during polymerization is CORRECT?

    Answer: PMMA shrinks volumetrically by 6–7% during polymerization

    PMMA undergoes approximately 6–7% volumetric shrinkage during polymerization, which can affect marginal fit of the provisional.

  4. A provisional crown placed on a tooth with a recent pulp cap should ideally be cemented with:

    Answer: Zinc oxide eugenol (ZOE) temporary cement

    ZOE has mild sedative and obtundent effects on the pulp, making it suitable when a recent pulp cap requires pulpal soothing during the provisional phase.

  5. The term 'open margin' on a provisional crown refers to:

    Answer: A gap between the provisional crown edge and the tooth preparation

    An open margin is a gap where the crown edge does not contact the tooth, allowing microleakage, sensitivity, and bacterial ingress.

  6. What is the PRIMARY reason for maintaining proper occlusal anatomy on a provisional crown?

    Answer: To prevent over-eruption of opposing teeth and maintain occlusal vertical dimension

    Proper occlusal anatomy maintains the vertical dimension and prevents supraeruption of opposing teeth, which would compromise space for the final restoration.

  7. An EFDA notices that the provisional crown has excess material (flash) extending onto the gingival tissue. The BEST instrument to remove this excess is:

    Answer: Curved scissors or acrylic bur on a slow-speed handpiece

    Curved scissors or a slow-speed acrylic bur allow controlled, precise trimming of excess provisional material without damaging the surrounding soft tissue.