10_Ctb 3.2 The Oral Cavity

Front 1

What are the three types of mucosa recognized within the oral cavity?

Back 1

1. Masticatory Mucosa
2. Lining mucosa
3. Transitional Zones

Front 2

Where is masticatory mucosa generally found?

Back 2

In areas of maximum abrasion such as hard palate and gingiva.

Front 3

What is the cell type of masticatory mucosa?

Back 3

Parakeratinzed or Keratinized Stratified Squamous

Front 4

Describe the Lamina Propria of the Masticatory Mucosa?

Back 4

Contains dense irregular connective tissue with interlacing fiber bundles (collagen), and numerous Deep Papilla

Front 5

Where is Lining Mucosa found and what is the cellular morphology?

Back 5

Found in areas of reduced abrasion. Eg inside of lip, cheek, alveolar process, soft palate. Morphology = Nonkeratinized Stratified Squamous. LP is thin but there is Submucosa that allows for movement of the mucosa.

Front 6

What are the two types of Transitional Zones?

Back 6

Mucocutaneous Junction (squishy stuff below tongue) and Mucogingival Junction

Front 7

What is the subtypes of Mucogingival Junction? What is the major difference between the two?

Back 7

1. Gingiva - Covered with Keratinized Epi
2. Alveolar Mucosa - Covered by nonkeritinized epithelium

Front 8

What are the four types of Papillae?

Back 8

1. Filiform Papillae
2. Fungiform Papillae
3. Foliate Papilla
4. Circumvallate Papillae

Front 9

They are the most numerous type of lingual papillae. Have a thick cornified epithelium

Back 9

Filiform Papillae

Front 10

They are blunt and may have taste buds:

Back 10

Fungiform Papillae

Front 11

Are few in number and are located on side of tongue.

Back 11

Foliate Papillae

Front 12

These are located just anterior to the sulcus terminalis. They are the largest of the lingual papillae and fewest in number (7-12). Contain numerous taste buds.

Back 12

Circumvallate Papillae

Front 13

What does ameloblasts secrete? What part of the tooth does this secretion cover?

Back 13

Enamel. It covers the crown of the tooth.

Front 14

What is 70% inorganic? What is it secreted by throughout life? Where is it located in the tooth?

Back 14

Dentin is secreted by Odontoblasts and present in the crown and roots of the tooth.

Front 15

What is 45-50% inorganic?. Where is it found on the tooth? What is it made by?

Back 15

Cementum. Covers the root of the tooth. Made by Cementocytes.

Front 16

The pulp contains what type of cells and tissue?

Back 16

Contains loose connective tissue, neurovascular structures, fibroblasts, macrophages, and odontoblasts.

Front 17

What makes up the periodontium? (4 structures)

Back 17

1. Alveolar Process
2. Cementum
3. Periodontal Ligament
4. Dentogingival Junction

Front 18

What is the alveolar process?

Back 18

The bony socket holding the tooth

Front 19

What is the cementum?

Back 19

Mineralized tissue covering the root of the tooth.

Front 20

What is the Periodontal Ligament?

Back 20

It is fibrous connective tissue between the root of the tooth and the alveolar bone. Functions include proprioception, nutrion, and support.

Front 21

What is the Dentogingival Junction?

Back 21

It is nonkeritinized epithelium covering the gingival apex and sulcus.

Front 22

What is attachment epithelium? What does its basement membrane function as? What does its lamina propria have?

Back 22

It is epithelium deep to gingival sulcus. It acts as a seal around the neck of the tooth. LP has defense cells.

Front 23

What are salivary glands covered with?

Back 23

Fibrous capsule of dense connective tissue.

Front 24

Cells that aid in release of secretory product in salivary acini are called:

Back 24

Myoepithelial Cells

Front 25

What are the three types of Acini found in salivary glands?

Back 25

Serous, Mucous, and Mixed

Front 26

Describe the morphology of Serous Acini with respect to their shape, nuclei shape, location of granules, staining of cytoplam.

Back 26

1. Spherical
2. Round nuclei
3. Apical secretory granules
4. Basophilic cytoplasm at base

Front 27

What does Serous Acini secrete? (i.e. what are the components)

Back 27

1. Amylase, lysozyme, peroxidase, DNAse, RNAse, sialomucin, sulfuomucin, growth factors.

Front 28

Dscribe the Mucos Acini with respect to their shape, nuclei, location of globules, location of organelles.

Back 28

1. Tubular
2. Flat basal nuclei
3. Apical mucous globules
4. Organelles at base of cell

Front 29

What do Mucous Acini secrete?

Back 29

Secrete mucins - a mixture of GAGs and glycoproteins.

Front 30

Mixed acini have a serous acinus cap called a:

Back 30

Serous Demilune

Front 31

Ducts of salivary glands are arranged in a recognized morphological hierarchy: (3 parts)

Back 31

1. Intercalated Ducts
2. Striated Ducts
3. Excretory Ducts

Front 32

Which ducts drain Acini? What type of epithelium are they lined with?

Back 32

Intercalated Ducts. Cuboidal

Front 33

What ducts train Intercalated Ducts? What happens in this duct?

Back 33

Striated Ducts. Ions and water cross the basal membrane here. The cells also secrete lysozyme, killikrein, K and bicarb. They reabsorb Na, Cl and transport IgA

Front 34

What drains Striated Ducts? What are the lined with? What do they add to the product?

Back 34

Excretory ducts. They are lined with pseudostratified to stratified columnar epithelium and may contain goblet cells. They add nothing and like it.

Front 35

What is the major difference between Major Salivary Glands and Minor Salivary Glands?

Back 35

Location. Major are outside the oral cavity. Minor are within the oral cavity and secreted continuously.

Front 36

Major Salivary gland secretion characteristics:
1. Continuous or noncontinuous?
2. Stimulation?
3. What it secretes?

Back 36

1. Noncontinuous
2. Require stimulation
3. Secrete mucous and serous products

Front 37

Minor Salivary gland secretion characteristics:
1. Continuous or noncontinuous?
2. Stimulation?
3. What it secretes?

Back 37

1. Continuous secretion
2. NA
3. Secrete primarily Mucus.

Front 38

Saliva is 90% water - what else does it contain?

Back 38

1. Contains Mucoproteins
2. Secretory IgA, ions, bacteria, desquamated epi cells and debris. May contain amylase for digest of starch and small CHO, libase for lipid breakdown and epi growth factor. Also has lysozyme, lactoferrin, and thicyanate

Front 39

What do dental carries result from?

Back 39

Demineralization of enamel by weak acids.

Front 40

What causes periodontal disease?

Back 40

Plaque build up and acid production by bactera lead to inflammation. Results in periodontal disease, receding gums, dentin exposure and tooth loosing or loss.