CIT Radiography & Imaging 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 Radiography & Imaging flashcards as text
Which radiographic landmark on a panoramic image indicates the floor of the maxillary sinus?
Answer: The Y-line formed by the nasal floor and sinus wall intersection
The inverted Y-shape (Ennis' Y) on panoramic images marks where the nasal floor meets the anterior wall of the maxillary sinus.
An implant placed in the maxillary anterior region shows a periapical radiolucency 6 months post-loading. The FIRST imaging step should be:
Answer: Standardized periapical radiograph using a paralleling technique
A standardized periapical film allows precise comparison to baseline images to assess changes in bone level around the implant.
What does a 'halo' radiolucency around the entire implant body on a periapical radiograph indicate?
Answer: Complete osseointegration failure
A circumferential radiolucency encompassing the entire implant indicates failed osseointegration with fibrous encapsulation.
In implant planning software, 'interactive implant placement' relies on which imaging dataset?
Answer: CBCT DICOM data merged with optical surface scan
Virtual implant planning requires 3D CBCT DICOM data, often merged with an optical scan for prosthetically driven placement.
Which principle explains why CBCT provides lower radiation dose than medical CT for implant planning?
Answer: CBCT uses a cone-shaped beam with a flat-panel detector, reducing scan time and dose compared to fan-beam medical CT
CBCT's cone beam geometry and flat-panel detector allow a single rotation to capture the entire volume, greatly reducing dose versus multi-slice medical CT.
When reviewing a CBCT for sinus proximity, which anatomic variation increases risk of sinus perforation during implant placement?
Answer: Inferior pneumatization of the sinus with <2 mm of crestal bone above the sinus floor
Extensive inferior pneumatization reduces available bone height, increasing the likelihood of sinus membrane perforation without a sinus lift.
A radiograph taken immediately after implant placement shows a gap between the implant threads and the surrounding bone. This finding is MOST likely:
Answer: Expected, as primary stability gaps fill with new bone during healing
Small peri-implant radiolucent gaps immediately post-placement are normal and typically resolve as bone regenerates into the space.