Oral Cavity

Question 1

What subdivision of the oral cavity is located between the lips/cheeks and the teeth/gums?

Answer 1

vestibule

Question 2

The opening from the oral cavity that communicates with exterior environment anteriorly?

Answer 2

oral fissure

Question 3

The opening from the oral cavity that communicates with oropharynx posteriorly?

Answer 3

fauces

Question 4

The fold of skin that connects the lips to the gums along the midline of the superior and inferior oral vestibule?

Answer 4

frenulum labii

Question 5

What structure is located on each cheek, lateral to the upper 2nd molar?

Answer 5

parotid papilla, where carotid duct enters the oral cavity

Question 6

The fold of mucosa that connects base of tongue to lower gums at the midline of the oral cavity?

Answer 6

frenulum lingula

Question 7

What structures are on either side of the frenulum lingula?

Answer 7

sublingual papillae where submandibular ducts enter the oral cavity

Question 8

What are the elongated folds/elevations covered in mucosa, that are located lateral to the sublingual papillae in the floor of the oral cavity?

Answer 8

sublingual folds which is where the sublingual gland ducts enter oral cavity through multiple openings

Question 9

The part of the tooth that projects beyond the gingiva?

Answer 9

crown

Question 10

The part of the tooth that is embedded into the alveoli of mandible or maxilla?

Answer 10

root

Question 11

The part of the tooth where the crown and the root join at the gingival line?

Answer 11

neck

Question 12

The part of the tooth that contains vessels and nerves?

Answer 12

pulp cavity

Question 13

The part of the tooth that connects to the pulp cavity?

Answer 13

root canal

Question 14

The layer of the tooth that covers the crown and is extremely hard and translucent?

Answer 14

enamel

Question 15

Why is enamel so hard?

Answer 15

it is made of 95% inorganic compounds

Question 16

The layer of the tooth that makes up most of the tooth and is ivory in color?

Answer 16

dentin (70% inorganic compounds vs the 95% inorganic compounds found in enamel)

Question 17

What is the pulp cavity filled with other than nerves and vessels?

Answer 17

dental pulp which is loose connective tissue that is lined by odontoblasts that make dentin

Question 18

What attaches the root of a tooth to the alveolar process?

Answer 18

periodontal ligament/membrane

Question 19

What attaches the periodontal ligament to the root of the tooth?

Answer 19

cementum

Question 20

Which of these tooth compounds regenerates throughout life: enamel, dentin, cementum?

Answer 20

dentin and cementum both regenerate

enamel does NOT regenerate

Question 21

What innervates that teeth and the periodontal ligaments?

Answer 21

alveolar nerves (posterior superior (V2), middle superior (V2), anterior superior (V2) and inferior alveolar (V3)

Question 22

How many deciduous teeth are there total and how many of each type?

Answer 22

20 total: 2,1,0,2 in each quadrant

2 incisors, 1 canine, 0 pre molars and 2 molars

Question 23

How many permanent teeth are there total and how many of each type?

Answer 23

32 total: 2,1,2,3 in each quadrant

2 incisors, 1 canine, 2 pre molars and 3 molars

Question 24

When do deciduous teeth begin to erupt?

Answer 24

between the 4th and 8th month postnatally

Question 25

When do permanent teeth begin to erupt?

Answer 25

between 6-8 years and continue until late teens

Question 26

Which teeth tend to have 3 roots?

Answer 26

upper molars

Question 27

which teeth tend to have 2 roots?

Answer 27

lower molars

Question 28

Which teeth tend to have only 1 root?

Answer 28

all but the molars