Tooth, Tounge, and Salivary Glands

Question 1

What is the internal soft tissue teeth are composed of?

Answer 1

Pulp

Question 2

How many calcified tissues are there in teeth?

Answer 2

3

Question 3

What are the three calcified tissues in teeth?

Answer 3

Enamel, Cementum, and dentin

Question 4

What is the order of the three layers of calcified tissue in teeth?

Answer 4

Enamel and Cementum and the surface layer while dentin is between surface layer and pulp.

Question 5

What are calcified dental tissues made of?

Answer 5

Calcium hydroxyapatite

Question 6

What covers the crown of a tooth?

Answer 6

Enamel

Question 7

What covers the root of a tooth?

Answer 7

Cementum

Question 8

Where is the cervix of a tooth?

Answer 8

Place where two surface materials meet (enamel and cementum)

Question 9

What makes up enamel?

Answer 9

2 fibrous high molecular weight glycoproteins called enamelin and amelogen

Question 10

What produces enamelin and amelogen?

Answer 10

Ameloblasts during crown formation

Question 11

When does enamel become acellular?

Answer 11

After tooth eruption (once your an adult)

Question 12

Where in the tooth is dentin found?

Answer 12

Surrounding central pulp chamber and root canal.

Question 13

What type of matrix does dentin have?

Answer 13

Calcified matrix

Question 14

Dentin has a calcified matrix with what type of fibers?

Answer 14

Collagen fibers

Question 15

What makes dentin?

Answer 15

Odontoblasts, which will continue to produce dentin

Question 16

Where can I find odontoblasts?

Answer 16

Located at the periphery of pulp where they send cytoplasmic extensions (odontoblastic processes) into tunnel like spaces called dentinal tubules within dentin.

Question 17

What produces the calcified matrix containing collagen in cementum?

Answer 17

Cementoblasts.

Question 18

What are the two divisions of cementum?

Answer 18

Apical cementum with cementocytes that have processes that extend to peridontal ligament. And coronal cementum that is acellular.

Question 19

True or false, both cellular and acellular cementum produce cementoblasts continuously?

Answer 19

True, this is done to compensate for decrease in tooth length from enamel abrasion.

Question 20

What is dental pulp?

Answer 20

Gelatinuous connective tissue with odontoblasts in the peripheral layer. Also made of fibroblasts and mesenchymal cells with thin collagen fibers.

Question 21

IS dental pulp richly vascularized?

Answer 21

Yes

Question 22

What type of nerve fibers innervate the pulp?

Answer 22

Sympathetic (vasomotor) that controls blood vessel diameter and sensory nerve fibers.

Question 23

How are sensations from the pulp interpreted?

Answer 23

As pain.

Question 24

What is the periodontal ligament?

Answer 24

A dental supporting structure

Question 25

What is the peridontal ligament composed of?

Answer 25

Dense irregular CT located between root cementum and bony alvelous.

Question 26

How are the collagen fibers of the peridontal ligament arranged?

Answer 26

Principal fiber bundles which extend from cementum to bone and suspends the tooth in its alvelous.

Question 27

What is the function of principal fiber bundles?

Answer 27

To absorb and counteract chewing forces.

Question 28

Does the peridontal ligament have it’s own nerve and vascular supply?

Answer 28

Yes and it’s abundant.

Question 29

What epithelium is the Gingivae covered in?

Answer 29

Stratified squamous partially keratinized epithelium.

Question 30

What type of connective tissue is involved Gingivae?

Answer 30

Dense irregular CT collagen.

Question 31

How is the collagen in the gingivae arranged?

Answer 31

Into 5 principal fiber bundles similar to peridontal ligament.

Question 32

Where does the gingivae attach?

Answer 32

It attaches to enamel surface via hemidesmosomes.

Question 33

What attaches to the alveolar bone proper?

Answer 33

The peridontal ligament

Question 34

Which layer of the alveolar bone is the cribiform plate?

Answer 34

Inner layer

Question 35

which layer is the outer layer of the alveolar bone?

Answer 35

Cortical plate

Question 36

What is the layer of the alveolar bone between inner and outer called?

Answer 36

Cancellous (trabecular) bone (spongiosa)

Question 37

What divides the tongue into anterior and posterior?

Answer 37

Sulcus terminalis

Question 38

What does the sulcus terminalis end in?

Answer 38

A shallow pit called the foramen cecum.

Question 39

What epithelium covers the dorsal surface of the tongue?

Answer 39

Stratified squamous parakeratinized epithelium.

Question 40

What is the ventral surface of the tongue covered in?

Answer 40

Nonkeratinized epithelium

Question 41

What do both dorsal and ventral sides of the tongue have?

Answer 41

Lamina propria and submucosa of dense irregular collagenous CT.

Question 42

What is the muscular core of the tongue?

Answer 42

Constitues the bulk of lingunial tissue.

Question 43

Where are the linguinal papillae located?

Answer 43

Dorsal surface of anterior 2/3 of tounge.

Question 44

How many shapes and functions is the dorsal surface of the tongue divided into?

Answer 44

4

Question 45

Name the four divisions of the dorsal surface of the tongue.

Answer 45

Filiform papillae, fungiform papillae, foliate papillae, and circumvallate papillae

Question 46

What are filiform papillae?

Answer 46

Short, narrow, highly keratinized pointed structures that project above tongue surface.

Question 47

What are Fungiform papillae?

Answer 47

Mushroom shaped projections above the tongue surface. interspersed among filiform papillae. And they occassionaly have taste buds.

Question 48

What is foliate papillae?

Answer 48

Shallow, longitudinal furrows located on the tongue lateral aspect.

Question 49

What is circumvallate papillae?

Answer 49

They are large, circular papillae surrounded by a moat like furrow. They are 10-15 in number and distributed in a V pattern anterior to sulcus terminalis.