Radiology E-learning

Question 1

Horizontal and vertical bitewings:

what is this?

Answer 1

the bitewing holder

Question 2

what type of bite block is this?

Answer 2

pedeatric horizontal biteblock

Question 3

what type of bite block is this?

Answer 3

adult horizontal biteblock

Question 4

How can you distinguish the horizontal bite blocks?

Answer 4

they both create a T shape

Question 5

what type of bite block is this?

Answer 5

vertical biteblock

Question 6

why is there only one size of vertical biteblock?

Answer 6

as they’re only conducted on adults

Question 7

how can a vertical biteblock be distinguished?

Answer 7

it creates a vertical line

Question 8

in bitewings, what is the size of image receptor used dependant on?

Answer 8

the age of the patient

Question 9

in dental radiography patients above what age are considered as adults?

Answer 9

above 13, due to facial and dental developent

Question 10

for patients aged 0-9, what size image receptor is recommended?

Answer 10

0 (in the paeds bite block)

Question 11

for patients aged 9-13, what size image receptor is recommended?

Answer 11

1 (in the paeds bite block)

Question 12

for patients over 13 what size image receptor is recommended?

Answer 12

size 2 (in an adult horizontal/ vertical bite block)

Question 13

which type of holder is this?

Answer 13

posterior periapical holder

Question 14

which teeth is a posterior periapical holder used to image?

Answer 14

6-8 upper and lower

Question 15

for any posterior periapical, whether its a child or an adult, which size image receptor is used?

Answer 15

size 2

Question 16

which type of holder is this?

Answer 16

upper anterior periapical holder

Question 17

which teeth is a upper anterior periapical holder used to image?

Answer 17

5-5 Both upper and lower

Question 18

what size image receptor is used for upper/lower anterior periapical? regardless if child or adult?

Answer 18

0

Question 19

OPT exam - which foreign objects need to be removed prior?

Answer 19

dentures
piercings
necklaces
glassess
metal hair clips
jackets
hoodies

Question 20

what may happen to the X ray image if the OPT machiene is too low when patient enters?

Answer 20

pt may hunch shoulders
excessive spinal shadowing
also as image is taken it is more likely to hit the shoulders

Question 21

lower canine - avg length?

Answer 21

27.5mm

Question 22

lower canine - roots?

Answer 22

1

Question 23

lower canine - canals?

Answer 23

1-2

Question 24

lower canine - foramina?

Answer 24

2

Question 25

lower first premolar - avg length?

Answer 25

23mm

Question 26

lower first premolar - roots?

Answer 26

1

Question 27

lower first premolar - canals?

Answer 27

1 canal 75% - 2 canals 24% - 3 canals 1%

Question 28

lower first molar - avg length?

Answer 28

22mm

Question 29

lower first molar - roots?

Answer 29

2 roots 95% - 3 roots 5%

Question 30

lower first molar -canals?

Answer 30

Mesial root 1 canal 12% - 2 canals 87% - 3 canals 1% Distal root 1 canal 70% - 2 canals 30%

Question 31

lower first molar -foramen?

Answer 31

Mesial 2 foramina 60% Distal 1 foramen 85%

Question 32

describe Law of Symmetry I

Answer 32

Except for maxillary molars, the orifices of the canals are equidistant from a line drawn in a mesial distal direction through the pulp-chamber floor

Question 33

describe Law of Symmetry II

Answer 33

Except for the maxillary molars, the orifices of the canals lie on a line perpendicular to a line drawn in a mesial-distal direction across the centre of the floor of the pulp chamber

Question 34

describe the Law of Colour change

Answer 34

The colour of the pulp-chamber floor is always darker than the walls

Question 35

describe the Law of Orifice Location I

Answer 35

The orifices of the root canals are always located at the junction of the walls and the floor

Question 36

describe the Law of Orifice Location II

Answer 36

The orifices of the root canals are located at the angles in the floor-wall junction

Question 37

describe the Law of Orifice Location III

Answer 37

The orifices of the root canals are located at the terminus of the root developmental fusion lines