CIT Prosthetics & Restoration Flashcards
7 cards from real CIT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 CIT Prosthetics & Restoration flashcards as text
Which cement type is most appropriate for retrievable implant-supported crowns requiring periodic maintenance access?
Answer: Temporary provisional cement with low retentive strength
Temporary provisional cement allows retrievability for maintenance while providing adequate short-term retention.
When designing a screw-retained implant crown, what is the ideal screw access channel angulation relative to the occlusal surface?
Answer: 0–15 degrees off-axis to avoid esthetic compromise
Screw channels within 0–15 degrees of the implant long axis maintain adequate structural integrity and esthetics.
A patient presents with a fractured zirconia implant crown three months after delivery. The most likely contributing factor is:
Answer: Excessive occlusal contacts in lateral excursion
Lateral excursive contacts create bending stresses that exceed zirconia's fracture toughness in unsupported areas.
An implant-supported fixed partial denture (FPD) pontic rests on tissue. Which pontic design minimizes tissue irritation while maintaining cleansability?
Answer: Modified ridge-lap pontic with concave lingual surface
The modified ridge-lap design provides esthetic contour on the buccal while allowing floss access on the lingual.
What is the primary purpose of using a torque wrench when seating an abutment on an implant?
Answer: To achieve manufacturer-specified preload without plastic deformation
Correct torque establishes optimal screw preload, clamping the abutment without yielding the screw material.
Which occlusal scheme is generally recommended for a single implant-supported molar crown in a dentate patient?
Answer: Light centric stops with freedom in centric and no excursive contacts on the implant crown
Light centric loading with excursive disclusion protects the implant-bone interface from lateral overload.
During final impression for an implant crown, a snap-on impression coping is used. Which technique does this describe?
Answer: Closed-tray (indirect) impression technique
Closed-tray technique uses a coping that remains in the mouth; the impression records the external form and the coping snaps out after set.