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Dentistry > Dentition in the Lagomorph, Rodent, and Ferret > Flashcards

Dentition in the Lagomorph, Rodent, and Ferret Flashcards

1
Q

All lagomorphs and most rodents are what?

A

Herbivores

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2
Q

Lagomorphs and rodents have what type of dentition?

A

Heterodont

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3
Q

What is heterodont dentition?

A

Variation in tooth size and shape

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4
Q

Which species do not have canine teeth?

A

Lagomorphs and rodents

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5
Q

What do Lagomorphs and rodents have instead of canines?

A

Long diastema between the incisors and cheek teeth

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6
Q

What is a diastema?

A

Toothless area

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7
Q

Are ferrets missing any teeth?

A

No.

They have incisors, canines, premolars and molars

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8
Q

Are Ferrets herbivores, omnivores or carnivores?

A

Carnivores

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9
Q

How do lagomorphs differ from rodents?

A

They have two pairs of maxillary incisor teeth

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10
Q

The rostral row of incisors consists of what?

A

Two larger functional teeth that are large and chisel-like

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11
Q

What do the second row of incisors consist of?

A

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

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12
Q

What lagomorph teeth are aradicular hypsodont type?

A

Incisors and cheek teeth

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13
Q

What is aradicular hypsodont type teeth?

A

Continuously growing and erupting throughout life

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14
Q

Aradicular hypsodont type teeth are also referred to as what?

A

Elodont

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15
Q

The aradicular hypsodont type teeth have what?

A

Visible clinical crowns

Reserve crowns submerged below the gingival margin

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16
Q

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

A

No

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17
Q

Do Lagomorphs have deciduous teeth?

A

Yes

They erupt in utero and shed around time of birth

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18
Q

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

A

Aradicular hypsodont

Aradicular hypsodont incisors and brachyodont cheek teeth

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19
Q

What is a brachyodont tooth?

A

Has a true distinction between the crown and the root structure

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20
Q

Do brachuodont teeth continue to grow once fully erupted?

A

No

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21
Q

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

A

Chinchillas

Guinea pigs

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22
Q

What species have aradicular hypsodont incisors and brachyodont cheek teeth

A

Mice

Rats

23
Q

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

A

Ferrets

24
Q

What is a common finding of the family Mustelidae?

A

Hourglass-shaped maxillary first molar teeth

25
Q

Because ferrets are carnivores they have highly specialized what?

A

Brachyodont dentition

26
Q

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

A

Lagomorphs (peg teeth are the exception)

Rodents

27
Q

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?

A

Cementum and dentin

28
Q

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

A

Guinea pig

29
Q

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

A

Distal to the roots of the last cheek tooth

30
Q

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

A

Near the mesial surface of the first cheek teeth

31
Q

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

A

Angled occlusal table surface

32
Q

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

A

On the labial side

33
Q

Where is the chisel point of the mandibular cheek teeth?

A

On the lingual side

34
Q

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

A

Toward the soft tissue of the cheek teeth

35
Q

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

A

Anisognathic

36
Q

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

A

~10-degree angle (dorsolingual to ventrobuccal)

37
Q

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

A

~30-degree angle

Dorsobuccal to ventrolingual

38
Q

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

A

Level occlusal plane

39
Q

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

A

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

40
Q

What is the dental formula for an adult rabbit?

A

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

41
Q

How many total teeth do adult rabbits have>

A

26 to 28

42
Q

What is the dental formula for adult hares?

A

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

43
Q

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

A

28

44
Q

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

A

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

45
Q

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

A

20

46
Q

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

A

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

47
Q

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

A

12 to 16 total teeth

48
Q

What is the dental formula for an adult gerbil?

A

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

49
Q

How many teeth do adult gerbils have?

A

16

50
Q

What is the dental formula for an adult squirrel?

A

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

51
Q

How many teeth do adult squirrels have?

A

20 to 22

52
Q

What is the dental formula for an adult ferret?

A

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

53
Q

How many teeth does an adult ferret have?

A

34

Dentistry (65 decks)

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