Dental Radiology

Question 1

What are the two different systems for intraoral radiographs

Answer 1

1) CR systems
2) DR systems

Question 2

CR systems

Answer 2

Positive: variety of plate sizes

Negative: more expensive, plates have to be replaced

Question 3

DR systems

Answer 3

Postive: more affordable to purchase
easier to learn to use

Negative: only a size 2 plat (on a large dog, youre taking a lot of images)

Question 4

What are the types of generators used in intraoral radiographs

Answer 4

Handheld: allow for greater flexibility in space within a dental suite, may not be allowed everywhere (Canada), may be harder to learn with

Wall or floor mounted: easier for learning, less flexible for physical space issues

Question 5

What is the difference between radiographs vs intraoral radiographs

Answer 5

plate is in the mouth of patient (need to be anesthetized), not sedated

intra-oral gets rid of superposition and only gets one side

Question 6

Why do we not do sedated intraoral radiographs in small animals

Answer 6

sedated patients can still bite

Question 7

Why arent dental radiographs not labeled

Answer 7

you can look at it and know what side youre looking at

Question 8

How do you tell if the dental radiograph is of the maxilla

Answer 8

crowns point down
look for the maxillary recess

Question 9

How do you tell if the dental radiograph is of the mandible

Answer 9

crowns point up
look for mandibular canal and the ventral cortex

Question 10

Why do you need to know where the maxillary recess is

Answer 10

1) dont want to drill into it
2) dont want to stab elevator into it
3) dont want to push tooth roots into it

Question 11

the maxillary recess always occur at the

Answer 11

apical portion of the maxillary teeth

Question 12

T/F: there are no three rooted teeth in the mandible

Answer 12

True

Question 13

the point where the cementum that covers the root, meets the enamel that covers the crown

Answer 13

the cementoenamel junction

Question 14

Why is it important to know where the cementoenamel junction is

Answer 14

bone loss -

alveolar bone should be 1-2mm below cementoenamel junction

if you can see the cementoenamel junction on your oral exam, then you know theyve had gingival recession

Question 15

chevron site

Answer 15

the site on the apex of the tooth where the blood supply is entering the tooth

Question 16

interradicular bone

Answer 16

the bone between different roots of a tooth

Question 17

What are the three structures that you need to review when looking at dental radiographs

Answer 17

1) Periodontal ligament
2) Periapical region
3) Tooth apex: where tooth abscesses occur

Question 18

Where do tooth abscesses occur

Answer 18

tooth apex

Question 19

how many teeth do dogs have

Answer 19

42

Question 20

how many teeth do cats have

Answer 20

30

Question 21

30% of rhinitis cases are caused by

Answer 21

tooth root abscesses

Question 22

What number is the carnassial tooth of the right mandible in dog

Answer 22

409 (1st mandibular molar)

Question 23

What number is the carnassial tooth of the left mandible in a dog

Answer 23

309 (1st mandibular molar)

Question 24

What number is the carnassial tooth of the left maxilla in the dog

Answer 24

208 (4th premolar)

Question 25

What number is the carnassial tooth of the right maxilla in the dog

Answer 25

108 (4th premolar)

Question 26

What is the dental formula of the dog

Answer 26

2x (3/3 I, 1/1 C, 4/4 PM, 2/3 M) = 42

Question 27

How many incisors do dogs have

Answer 27

12- 6 on top and 6 on bottom

Question 28

How many canines do dogs have

Answer 28

4- 2 on top, 2 on bottom

Question 29

How many premolars do dogs have

Answer 29

16- 8 top, 8 bottom (4 on each quadrant)

Question 30

How many molars do dogs have

Answer 30

2(2/3)
4 on top
6 on bottom
10 total

Question 31

What is the dental formula of the cat

Answer 31

2( 3/3 I, 1/1 C, 3/2 PM, 1/1M)

Question 32

How many incisors do cats have

Answer 32

12 incisors (6 top, 6 bottom) 3 in each quadrant

Question 33

How many canines do cats have

Answer 33

4 (2 top, 2 bottom) 1 in each quadrant

Question 34

How many premolars do cats have

Answer 34

10 (6 top, 4 bottom) 3 in upper quadrants, 2 in lower quadrants

Question 35

How many molars do cats have

Answer 35

4 (2 top, 2 bottom) 1 in each quadrant

Question 36

In the dog, what teeth have 3 roots

Answer 36

Maxillary PM4, M1, M2

Question 37

In the cat, what teeth have 3 roots

Answer 37

Maxillary PM4 (108+208) and M1 (109+209)

Question 38

How many roots do the incisors have

Answer 38

1 root

Question 39

How many roots do the canines have

Answer 39

1 root

Question 40

In the dog, PM1 always have _____ roots

Answer 40

1 root