Oral Cavity

Question 1

How doe the oral cavity perform an immune function?

Answer 1

IgA secretion

Tonsilar ring of Waldeyer

Question 2

What are the general functions of the oral cavity?

Answer 2

Question 3

Are we born with teeth?

Answer 3

No

Question 4

When do teeth start to come in?

Answer 4

6 months

Question 5

When do we begin to lose primary teeth?

Answer 5

Age 6 y/o

Question 6

Why do we have baby teeth?

Answer 6

Important for growth and maintenace of space in oral cavity

Question 7

How many baby teeth do we have?

How many adult teeth do we have?

Answer 7

20

32

Question 8

For every month beyond 6 months the child is, they should have […] teeth

Answer 8

1 tooth for every month

Question 9

Answer 9

Question 10

Posterior teeth in the mandible have […] roots while posterior teeth in the maxilla have […] to […] roots

Answer 10

2

3 ; 4

Question 11

Answer 11

Question 12

Answer 12

Question 13

Answer 13

Question 14

Answer 14

Question 15

The first, second and third molars erupt at ages […], […], and […] years old.

Answer 15

6, 12, 18 - 20s

Question 16

Answer 16

Question 17

What is enamel?

Answer 17

Question 18

What is cementum?

Answer 18

Question 19

Enamel originates from […] cells

Dentin and cementum originate from […] cells

Answer 19

Epithelial

Mesenchymal

Question 20

What is dentin?

Answer 20

Also, dentin is the first part of tooth that is mineralized, necessary in order for enamel to minteralize on top.

Responsible for sensitivity –> odontoblasts that sit between dentin and pulp have processes that extend through dentin. If exposed by erosion of enamel, then nerve endings from the pulp that are related to these processes can be triggered and and cause pain.

Question 21

What is dental pulp?

Answer 21

Question 22

How are odontoblasts responsible for pain / tooth sensitivity?

Answer 22

Odontoblast cell body in contact with nerve endings

Odontoblast sits in tubule filled with fluid, changes in fluid can trigger pain signals in nerve, happens when dentin is exposed

Question 23

Dental caries is caused by […]

Answer 23

Streptococcus Mutans

Question 24

Why is it important to use fluoride in drinking water and toothpastes?

Answer 24

Fluoride combines with hydroxyapatite in enamel and makes it more resistant to demineralization thus proloning the lifetime of enamel and reducing incidence of dental caries

Question 25

Answer 25

Question 26

Describe the epithelium of the oral soft tissues?

Answer 26

Question 27

What is the periodontal ligament?

Answer 27

Type 1 collagen fibrils running from root of tooth into alveolar bone of mandible and maxilla