Dentition in the Lagomorph, Rodent, and Ferret

Question 1

All lagomorphs and most rodents are what?

Answer 1

Herbivores

Question 2

Lagomorphs and rodents have what type of dentition?

Answer 2

Heterodont

Question 3

What is heterodont dentition?

Answer 3

Variation in tooth size and shape

Question 4

Which species do not have canine teeth?

Answer 4

Lagomorphs and rodents

Question 5

What do Lagomorphs and rodents have instead of canines?

Answer 5

Long diastema between the incisors and cheek teeth

Question 6

What is a diastema?

Answer 6

Toothless area

Question 7

Are ferrets missing any teeth?

Answer 7

No.

They have incisors, canines, premolars and molars

Question 8

Are Ferrets herbivores, omnivores or carnivores?

Answer 8

Carnivores

Question 9

How do lagomorphs differ from rodents?

Answer 9

They have two pairs of maxillary incisor teeth

Question 10

The rostral row of incisors consists of what?

Answer 10

Two larger functional teeth that are large and chisel-like

Question 11

What do the second row of incisors consist of?

Answer 11

Two smaller incisors
Referred to as “peg” teeth
Sits immediately behind the 1st row

Question 12

What lagomorph teeth are aradicular hypsodont type?

Answer 12

Incisors and cheek teeth

Question 13

What is aradicular hypsodont type teeth?

Answer 13

Continuously growing and erupting throughout life

Question 14

Aradicular hypsodont type teeth are also referred to as what?

Answer 14

Elodont

Question 15

The aradicular hypsodont type teeth have what?

Answer 15

Visible clinical crowns

Reserve crowns submerged below the gingival margin

Question 16

Because the incisors and cheek teeth of lagomorphs are aradicular hypsodont and continue to grow and erupt do they form roots?

Answer 16

No

Question 17

Do Lagomorphs have deciduous teeth?

Answer 17

Yes

They erupt in utero and shed around time of birth

Question 18

What are the two basic types of teeth found in the rodent?

Answer 18

Aradicular hypsodont

Aradicular hypsodont incisors and brachyodont cheek teeth

Question 19

What is a brachyodont tooth?

Answer 19

Has a true distinction between the crown and the root structure

Question 20

Do brachuodont teeth continue to grow once fully erupted?

Answer 20

No

Question 21

What species have aradicular hypsodont teeth for both the incsiors and cheek teeth?

Answer 21

Chinchillas

Guinea pigs

Question 22

What species have aradicular hypsodont incisors and brachyodont cheek teeth

Answer 22

Mice

Rats

Question 23

What species have maxillary 4th premolars and mandibular first molars teeth that are sectorial (closing in a “scissor-like” fashion)

Answer 23

Ferrets

Question 24

What is a common finding of the family Mustelidae?

Answer 24

Hourglass-shaped maxillary first molar teeth

Question 25

Because ferrets are carnivores they have highly specialized what?

Answer 25

Brachyodont dentition

Question 26

In what species do the maxillary and mandibular incisor teeth come to a chisel-like point?

Answer 26

Lagomorphs (peg teeth are the exception) | Rodents

Question 27

The maxillary and mandibular incisor teeth of lagomorphs and rodents have enamel on the front and lateral sides but just what on the palatal/lingual surface that makes them wear faster resulting in the chisel edge?

Answer 27

Cementum and dentin

Question 28

The enamel of incisors in most rodents takes on a yellow-orange color except for what rodent?

Answer 28

Guinea pig

Question 29

Where does the mandibular incisor apex lie in rats and mice?

Answer 29

Distal to the roots of the last cheek tooth

Question 30

Where does the apex of the mandibular incisor of rabbits and chinchillas lie?

Answer 30

Near the mesial surface of the first cheek teeth

Question 31

Due to their unique function, hypsodont cheek teeth have this rather than a flat occlusal table surface?

Answer 31

Angled occlusal table surface

Question 32

Where is the highest point of the chisel tip of the maxillary cheek teeth?

Answer 32

On the labial side

Question 33

Where is the chisel point of the mandibular cheek teeth?

Answer 33

On the lingual side

Question 34

Where does the occlusal table surface of the mandibular cheek teeth angle?

Answer 34

Toward the soft tissue of the cheek teeth

Question 35

What is the naturally unequal, jaw relationship, in which the upper dental arch is slightly wider than the lower dental arch?

Answer 35

Anisognathic

Question 36

What is the angle of the occlusal plane of the cheek teeth in healthy rabbits?

Answer 36

~10-degree angle (dorsolingual to ventrobuccal)

Question 37

What is the angle of the occlusal plane of the cheek teeth in healthy guinea pigs?

Answer 37

~30-degree angle | Dorsobuccal to ventrolingual

Question 38

What is the angle of the occlusal plane of the cheek teeth in healthy chinchillas?

Answer 38

Level occlusal plane

Question 39

What adaptation of hypsodont teeth is thought to explain how the periodontal ligament allows for a continued eruption?

Answer 39

The intermediate plexus between the tooth and the bony attachments allowing continuously growing teeth to move coronally as they grow

Question 40

What is the dental formula for an adult rabbit?

Answer 40

2 x (2/1 I, 0/0 C, 3/2 P, 2-3/3 M

Question 41

How many total teeth do adult rabbits have>

Answer 41

26 to 28

Question 42

What is the dental formula for adult hares?

Answer 42

2 x (2/1 I, 0/0 C, 3/2 P, 3/3 M)

Question 43

What is the total amount of teeth an adult hare has?

Answer 43

28

Question 44

What is the dental formula for adult guinea pigs, chinchillas, and degus?

Answer 44

2 x (1/1 I, 0/0 C, 1/1 P, 3/3 M)

Question 45

How many teeth do adult guinea pigs, chinchillas and degus have?

Answer 45

20

Question 46

What is the dental formula for an adult rat and an adult hamster?

Answer 46

2 x (1/1 I, 0/0 C, 0/0 P, 2-3/2-3 M)

Question 47

How many teeth do an adult rat and an adult hamster have?

Answer 47

12 to 16 total teeth

Question 48

What is the dental formula for an adult gerbil?

Answer 48

2 x (1/1 I, 0/0 C, 0/0 P, 3/3 M)

Question 49

How many teeth do adult gerbils have?

Answer 49

16

Question 50

What is the dental formula for an adult squirrel?

Answer 50

2 x (1/1 I, 0/0 C, 1-2/1 P, 3/3 M)

Question 51

How many teeth do adult squirrels have?

Answer 51

20 to 22

Question 52

What is the dental formula for an adult ferret?

Answer 52

2 x (3/3 I, 1/1 C, 3/3 P, 1/2 M)

Question 53

How many teeth does an adult ferret have?

Answer 53

34