Radiographic Localisation

Question 1

why do we need radiographic localisation

Answer 1

determine location of a structure of pathological lesion in relation to other structures

Question 2

what are the two options to view something at right angles

Answer 2

panoramic and lower true occlusal
paralleling periapical and lower true occlusal

Question 3

how do you achieve radiographic localisation

Answer 3

take two views at right angles in their projection geometry

Question 4

what happens if you cannot have a view at right angles but want a different view

Answer 4

use horizontal or vertical tube shift

Question 5

what is parallax

Answer 5

an apparent change in position of an object, caused by a real change in the position of the observer

Question 6

what pneumonic is used to determine where the true position of a tooth is when using 2 different radiographs

Answer 6

SLOB

Question 7

what does SLOB stand for

Answer 7

same
lingual
opposite
buccal

Question 8

how do we look at two different radiographs

Answer 8

identify direction of tube movement
choose a reference
observe movement in the correct direction

Question 9

what are the views used for horizontal tube shift

Answer 9

2 periapicals
2 bitewings
2 oblique occlusals

Question 10

what are the views used for vertical tube shift

Answer 10

panoramic and oblique occlusal
panoramic and lower bisecting angle periapical