Techniques 2

Question 1

when taking bitewings The x-ray beam should be at ? to the ? and the ? to avoid ? of the image

Answer 1

right angle
tooth
receptor
distortion

Question 2

upward angulation of x-ray beam causes what to the tooth?

Answer 2

elongation

Question 3

downward angulation of x-ray beam causes what to the tooth?

Answer 3

shortening

Question 4

what do horizontal bitewings show?

Answer 4

distal 4 to mesial 8
crowns and 1/3 roots

Question 5

name some negatives of vertical bitewings

Answer 5

2 radiographs required to view 4-8 so more radiation exposure to patient

Harder to tolerate by patient as larger

Question 6

what do vertical bitewings show in comparison to horizontal bitewings?

Answer 6

Shows more of the root

Question 7

bitewing technique
Place notch on the ? of the ? on the centre of the ? to get view of ?

Answer 7

middle
bite block
6
4-8

Question 8

bitewing positioning
Film and object ?
Film close to the ?
X-ray beam ? to the object and film
Use a ?
Orientation dot always goes to the ?

Answer 8

parallel
object
perpendicular
holder
palate

Question 9

what type of holders do we use in the dental hospital?

Answer 9

Rinn holders
red for bitewings

Question 10

what do u use if the patient cant tolerate the holder when taking bitewings?

Answer 10

paper tabs
no guide to position the tube so can cause inaccuracies

Question 11

remember when positioning bitewing holders
All 4 corners of the collimator (x-ray beam) against the guiding ring

Question 12

what can cause horizontal tooth overlap in x-rays?

Answer 12

tooth crowding
object and film not parallel

Question 13

horizontal overlap is acceptable if? 3

Answer 13

less than half of the image is superimposed

can see the ADJ

dentinal half of the enamel

(all three)

Question 14

what can cause separation of cusps in the x-ray image?

Answer 14

vertical angulation of x-ray beam (not parallel)

Question 15

what receptor size do u use in bitewings of adults?

Answer 15

2

Question 16

what receptor size do u use in bitewings of child >10yrs?

Answer 16

2

Question 17

what receptor size do u use in bitewings of child <10yrs

Answer 17

0 or 1

Question 18

if a child doesnt cooperate with bitewings what do u do?

Answer 18

change to lateral oblique mandibles

Question 19

what is a collimator?

Answer 19

Device fitted to the end of the x-ray tube

Has 4 corners that need to be positioned against the holder ring

Can reduce the dose to the patient by up to 50%

Question 20

Question 21

Question 22

Question 23

Question 24

Question 25

Question 26

Question 27

Question 28

Question 29

Question 30

Question 31