Digestive System

Question 1

What is the apical end of a tooth?

Answer 1

-the tiny opening at the tip of each root
-blood vessels and nerves from surrounding tissue pass through the apical to enter the tooth

Question 2

What is the difference between tooth growth and tooth eruption?

Answer 2

-growth:
-new tooth material is formed at the apical end of the tooth and occurs at the same time as eruption, eventually ceasing over the animal’s lifetime

-eruption:
-continues even after the tooth has stopped growing and develops roots

Question 3

What is tooth eruption?

Answer 3

-a process in tooth development in which the teeth enter the mouth and become visible

Question 4

What is tooth growth?

Answer 4

-the development of a tooth into the mouth
-aka odontogenesis
-new tooth material is formed at the apical end of the tooth

Question 5

What are the features of brachydont teeth?

Answer 5

-low/short crowned teeth
-sole tooth type in carnivores
-has a limited period of growth and eruption

Question 6

What are the sole teeth type carnivores have?

Answer 6

-brachydont

Question 7

What are the features of hypsodont teeth?

Answer 7

-long/high crowned teeth
-can continue to grow for the animal’s life
-enamel extends past the gum line
-enamel covers the entire body of the tooth but not the root
-prolonged growth and eruption period
-found in herbivores and part of an omnivore’s dental type
-good for animals with abrasive diets

Question 8

Does enamel cover the crown and roots in hypsodont teeth?

Answer 8

-no, enamel covers the entire body of the tooth but not the root

Question 9

Are the roots of brachydont teeth, covered in enamel?
If not, what are they covered in?

Answer 9

-no, the root is not covered in enamel
-the root is covered in cementum

Question 10

What part of a tooth is the occlusal surface?

Answer 10

-the part that comes in contact with the opposite jaw
-chewing/masticatory surface

Question 11

What is an infundibulum?

Answer 11

-a cup shaped structure in the occlusal surface of the tooth

Question 12

When it gets to the bottom of the infundibulum, what is it called?

Answer 12

-the mark

Question 13

What in a horse is the star?

Answer 13

-the pulp cavity being protected by secondary dentine and sometimes, tertiary dentine

Question 14

What is the main difference between hypsodont and brachydont teeth?

Answer 14

-hypsodont teeth have a higher crown

Question 15

What animals have hypsodont teeth?

Answer 15

-horses
-cows

Question 16

What animals have brachydont teeth?

Answer 16

-humans
-carnivores such as:
-dogs
-cats
-pigs

Question 17

What is dentine?

Answer 17

-the structure support of the tooth
-the second hardest tissue in the body, after enamel

Question 18

Is enamel harder than dentine

Answer 18

-yes

Question 19

When does the pulp cavity come to the surface?

Answer 19

-when the tooth progressively wears away

Question 20

Role of the infundibulum?

Answer 20

-produce greater amounts of enamel in vertical curtains that substantially increase the durability of the tooth

Question 21

What is the vestibular?

Answer 21

-the space between the lips, cheeks and teeth (dental arcades)

Question 22

What is the name of the tooth surface facing the lips?

Answer 22

-labial

Question 23

Name the surface of the tooth facing the cheek

Answer 23

-buccal

Question 24

What is the name of the tooth surface that comes in contact with teeth of the opposite jaw

Answer 24

-occlusal

Question 25

Name the tooth surface that faces the tongue

Answer 25

-lingual -aka glossal

Question 26

What part of the tooth surface is the palantine?

Answer 26

-the opposite side of the buccal -faces the palate -in the upper arcade only

Question 27

What does arcade refer to?

Answer 27

-a row of teeth

Question 28

What is the difference between the palatine and lingual surfaces?

Answer 28

-palatine surface is in the upper arcade-faces the palate -lingual surface is in the lower and upper arcade

Question 29

What does interproximal/interdental mean?

Answer 29

-interchangeable terms -the area in which two adjacent teeth meet

Question 30

What species are the terms mesial and distal used?

Answer 30

-in carnivores

Question 31

In relation to interproximal/interdental teeth, what do the terms mesial and distal refer to?

Answer 31

-mesial: the equivalent of the rostrally facing interdental surface -distal: the caudal facing interdental surface