Dental Radiology & Imaging Flashcards
7 cards from real ADAT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Dental Radiology & Imaging flashcards as text
Which radiographic technique positions the image receptor parallel to the long axis of the tooth and directs the central beam perpendicular to both?
Answer: Paralleling technique
The paralleling technique places the receptor parallel to the teeth and aims the beam perpendicularly, minimizing geometric distortion compared to the bisecting angle technique.
Which type of radiograph is most effective for detecting interproximal caries in posterior teeth?
Answer: Bitewing radiograph
Bitewing radiographs image the crowns of both arches simultaneously and are the gold standard for detecting early interproximal carious lesions.
Which radiation unit accounts for the biological effect of ionizing radiation on human tissues?
Answer: Sievert (Sv)
The Sievert (Sv) is the SI unit of equivalent dose, incorporating both the absorbed dose and the radiation weighting factor to reflect biological damage.
A processed periapical radiograph appears light and lacks adequate image density. Which processing error is the most likely cause?
Answer: Developer solution that is too cool
A developer solution that is too cool slows the chemical reduction reaction, resulting in an underdeveloped, light radiograph with poor density.
What does the ALARA principle stand for in dental radiation protection?
Answer: As Low As Reasonably Achievable
ALARA — As Low As Reasonably Achievable — is the guiding principle in radiation protection, requiring operators to minimize patient and occupational exposure at all times.
Which anatomical structure appears as a dense radiopaque U-shaped or linear structure overlying the maxillary molar region on a periapical radiograph?
Answer: Zygomatic process of the maxilla
The zygomatic process of the maxilla (malar bone attachment) appears as a dense, inverted U-shaped or wedge-shaped radiopacity superimposed over the maxillary molar region.
When using the bisecting angle technique, a foreshortened image results from which error in vertical angulation?
Answer: Excessive positive angulation
Excessive positive vertical angulation causes the central beam to strike the bisecting plane at too steep an angle, compressing the image and producing foreshortening.