Oral Mucosa Part 1 - By Mond

Oral mucosa

TOPIC: ORAL MUCOSA

The oral cavity is lined with an uninterrupted mucous membrane, which is continuous with the skin near the vermillion border of the lips and with the pharyngeal mucosa in the region of the soft palate and anterior pillars of fauces.

Uninterrupted mucous membrane

TOPIC: ORAL MUCOSA

What is the oral cavity lined with?

1. Vermillion border of the lips

2. Pharyngeal mucosa in the region of the soft palate

3. Anterior pillars of fauces

TOPIC: ORAL MUCOSA

What is the oral cavity’s uninterrupted mucous membrane continuous with? (3)

Ectoderm
Endoderm

TOPIC: ORAL MUCOSA

The epithelium of the oral mucosa originates partly from the ___________ and partly from the _________

Lips
Vestibule
Gingiva
Cheeks
Palate
Floor of the mouth

TOPIC: ORAL MUCOSA

The Ectoderm consists of: (6)

Tongue

TOPIC: ORAL MUCOSA

The Endoderm consists of: (1)

Masticatory mucosa
Lining mucosa
Specialized mucosa

TOPIC: TYPES OF ORAL MUCOSA

What are the 3 types of oral mucosa?

Gingiva
Hard palate

TOPIC: TYPES OF ORAL MUCOSA

What comprises the masticatory mucosa? (2)

Lip
Cheek
Vestibular fornix
Alveolar mucosa
Floor of the mouth
Soft palate

TOPIC: TYPES OF ORAL MUCOSA

What comprises the lining mucosa? (6)

Dorsal surface of the tongue
Taste buds

TOPIC: TYPES OF ORAL MUCOSA

What comprises the specialized mucosa? (2)

Masticatory mucosa

TOPIC: TYPES OF ORAL MUCOSA

In the areas of free and attached gingiva and hard palate comes in primary contact with food during mastication and is keratinized

Keratinized

TOPIC: TYPES OF ORAL MUCOSA

A process by which epithelial cells lose their moisture and are replaced by horny tissue

Lining mucosa

TOPIC: TYPES OF ORAL MUCOSA

In areas of the lips, cheeks, vestibule, floor of the mouth, interior surface of the tongue and soft palate. It does NOT function in mastication and therefore has little attrition. It is soft, pliable and NON-KERATINIZED

Specialized mucosa

TOPIC: TYPES OF ORAL MUCOSA

On the DORSAL SURFACE (dorsum) of the tongue. It is covered with cornified epithelial papillae.

Cornify

TOPIC: TYPES OF ORAL MUCOSA

Conversion of cells into the horny layer of skin

Protection
Sensation
Secretion
Permeability and absorption
Thermal regulation

TOPIC: Functions of Oral Mucosa

What are the functions of the oral mucosa? (5)

Protection

TOPIC: Functions of Oral Mucosa

Function of the oral mucosa that separates and protects deeper tissues and organs in the oral region from the ENVIRONMENT of the oral cavity.

Normal activities of seizing foods and biting and chewing
Microorganisms within the oral cavity that will cause infection

TOPIC: Functions of Oral Mucosa

In the Function of Protection, the oral mucosa acts as a major barrier to: (2)

Sensation

TOPIC: Functions of Oral Mucosa

The function of the oral mucosa that provides considerable information about EVENTS within the oral cavity

Temperature
Touch
Pain
Taste buds
Certain receptors in the oral mucosa probably respond to “taste” of the water
Reflexes such as swallowing, gagging, salivation

TOPIC: Functions of Oral Mucosa

In the function of Sensation, it is suggested that in the mouth there are receptors that respond to several factors. What are these factors? (6)

Secretion

TOPIC: Functions of Oral Mucosa

The function of the oral mucosa that suggests that the major secretion associated with the oral mucosa is SALIVA which contributes to the maintenance of moist surface

Saliva

TOPIC: Functions of Oral Mucosa

What is the major secretion of the oral mucosa that contributes to the maintenance of moist surface?

Permeability and absorption

TOPIC: Functions of Oral Mucosa

The function of the oral mucosa that suggests that The thinnest epithelial region, the FLOOR OF THE MOUTH, may be permeable than the other areas which is perhaps the reason why certain drugs are successfully absorbed when held UNDER THE TONGUE

Floor of the mouth

TOPIC: Functions of Oral Mucosa

What is the thinnest epithelial region of the oral mucosa which may be permeable than the other areas which is perhaps the reason why certain drugs are successfully absorbed when held under the tongue?

Thermal regulation

TOPIC: Functions of Oral Mucosa

The function of the oral mucosa that plays a major role in some animals in the regulation of body temperature

True

TOPIC: Functions of Oral Mucosa

TRUE or FALSE: The human oral mucosa plays practically NO ROLE in regulating body temperature

Oral epithelium
Lamina Propia or Corium

TOPIC: General Histologic Characteristics of Oral Mucosa

What are the two main tissue components of oral mucosa?

Stratified Squamous Epithelium

TOPIC: General Histologic Characteristics of Oral Mucosa

What is the Oral Epithelium?

An underlying connective tissue layer

TOPIC: General Histologic Characteristics of Oral Mucosa

What is the Lamina Propia or Corium?

Upward projection
Connective tissue papillae
Rete ridges
Rete pegs

TOPIC: General Histologic Characteristics of Oral Mucosa

The interface between epithelium and connective tissue is usually __________________ called ____________________, interdigitate with epithelial ridges or pegs sometimes called _________ or _________

Loose fatty or granular connective tissue
Major blood vessels and nerves
Bones and muscles

TOPIC: General Histologic Characteristics of Oral Mucosa

The oral mucosa is attached to the underlying structures by a layer of _______________________, containing _________________________, separates the oral mucosa from underlying _____________________

Keratinized
Non-kertinized

TOPIC: Tissue components of the oral mucosa

What are the 2 kinds of Surface Epithelium?

Masticatory mucosa
Vermillion border of the lip

TOPIC: Tissue components of the oral mucosa

What comprises the Keratinized surface epithelium? (2)

Lining mucosa
Specialized mucosa

TOPIC: Tissue components of the oral mucosa

What comprises the Non-keratinized surface epithelium? (2)

Stratum Corneum (keratinized layer)
Stratum Granulosum (granular layer)
Stratum Spinosum (prickle-cell layer)
Stratum Basale (basal layer)

TOPIC: Tissue components of the oral mucosa

What are the 4 layers of tissue under Keratinized (ortho, para, incomplete) hornified or cornified

Stratum Superficiale
Stratum Intermedium
Stratum Basale

TOPIC: Tissue components of the oral mucosa

What are the 3 layers of tissue under Non-Keratinization

Orthokeratinization

TOPIC: KERATINIZATION (ORTHO,PARA,INCOMPLETE) HORNIFIED OR CORNIFIED

About 20-30% of the gingiva, the stratum corneum is homogenous and made up of flat, closely packed keratinized cells WITHOUT NUCLEI

20-30%
homogenous
without nuclei

TOPIC: KERATINIZATION (ORTHO,PARA,INCOMPLETE) HORNIFIED OR CORNIFIED

In Orthokeratinization, it comprises about _________ of the gingiva, the stratum corneum is _______________ and made up of flat, closely packed keratinized cells ________________

Parakeratinization

TOPIC: KERATINIZATION (ORTHO,PARA,INCOMPLETE) HORNIFIED OR CORNIFIED

Approx. 50-70% of the cases, the stratum corneum is homogenous and consists of flat keratinized cells with PYKNOTIC NUCLEI and remnants of cytoplasmic organelles

50-70%
Pyknotic nuclei
remnants of cytoplasmic organelles

TOPIC: KERATINIZATION (ORTHO,PARA,INCOMPLETE) HORNIFIED OR CORNIFIED

In Parakeratinization, Approx. ________ of the cases, the stratum corneum is homogenous and consists of flat keratinized cells with _________________ and __________________________

Incomplete keratinization

TOPIC: KERATINIZATION (ORTHO,PARA,INCOMPLETE) HORNIFIED OR CORNIFIED

Least common type, approximately 7-10% of cases and is seen only in the region of the marginal gingiva

7-10%
marginal gingiva

TOPIC: KERATINIZATION (ORTHO,PARA,INCOMPLETE) HORNIFIED OR CORNIFIED

Incomplete keratinization is the least common type, approximately ________ of cases and is seen only in the region of the __________________