Radiology update Flashcards
1
Q
What are the techniques used to take periapical radiographs ?
A
- paralleling technique
- bisecting angle technique
2
Q
What are the advantages of the paralleling technique?
A
- distortion minimised
- reproducible
- little (predictable) magnification
- less technique sensitive
3
Q
What are the disadvantages of the paralleling technique?
A
- sometimes harder to tolerate
- needs extra equipment
4
Q
What are the disadvantages of the bisecting angle technique?
A
- more distortion
- nor reproducible
- uneven magnification
- no extra equipment needed
- technique more prone to errors
5
Q
What is the advantage of the bisecting angle technique?
A
they are easier to tolerate
6
Q
What considerations must you make for occlusal radiographs?
A
- collimation
- possibility of a thyroid collar
7
Q
Lateral oblique radiographs have largely been superceeded by…
A
good quality panoramic radiographs
8
Q
What are the targets in a dental practice for acceptable radiographs?
A
not less than 90%
9
Q
What are the targets in a dental practice for unacceptable radiographs?
A
not greater than 10%
