Oral Mucosa

Flashcards about Oral Mucosa

What is the oral mucous membrane or oral mucosa?

Moist lining of the oral cavity.

What are the main types of oral mucosa?

Masticatory, Lining, and Specialized Mucosa

What does the Masticatory Mucosa include?

Gingiva and hard palate.

What does the Lining Mucosa include as Firmly Attached Lining Mucosa?

Covering of the soft palate, lips, cheeks, inferior surface of the tongue, and tonsils.

What does the Lining Mucosa include as Loosely Attached Lining Mucosa?

Alveolar mucosa, vestibular mucosa, and mucosa of the floor of the mouth (sublingual sulcus).

What does Specialized Mucosa include?

Dorsum of the tongue.

What are the functions of the Oral Mucosa?

Protection, Sensation, Permeability & Absorption, Secretion, and Thermal Regulation

How does the oral mucosa provide Protection?

As a surface lining, it separates and protects deeper tissues and organs in the oral region from the environment of the oral cavity.

How does the oral mucosa provide Sensation?

The receptors of the mouth respond to temperature, touch, pain, and taste (taste buds).

Which region of the mouth may be more permeable allowing for Permeability & Absorption?

The thinnest epithelial region, the floor of the mouth.

What is the major secretion associated with oral mucosa?

Saliva

What are the two layers the Histologic Characteristics of Oral Mucosa Consists of?

Surface epithelium and lamina propia.

What are the types of Surface epithelium?

Keratinized and Non-keratinized

What are the layers of the Lamina Propria?

Papillary layer and reticular layer.

What are the layers of Keratinized Epithelium?

Keratinous layer, Granular layer, Prickle cell layer, and Basal cell layer

What are the layers of Non-Keratinized Epithelium?

Superficial layer, Intermediate layer, and Basal cell layer

What is the papillary layer?

connective tissue layer that indents the epithelium

What is a Clinical Feature of Oral Mucosa?

Oral mucosa is more deeply colored than skin.

What factors affect the coloration of the tooth on the labial, buccal or lingual surface?

Concentration and state of dilation of small blood vessels in the underlying connective tissue, Thickness of the epithelium, Degree of keratinization, and Amount of melanin in the epithelium

What are the Glandular components of oral mucosa?

Minor salivary glands and Sebaceous glands

What is pale yellow spots called, present in the upper lip and buccal mucosa?

Fordyce's spots

Which is an example of a topographic feature Oral mucosa?

Gingiva

What is the Gingiva?

Part of the firm oral masticatory mucosa

What are the Clinical Parts of the Gingiva?

Free gingiva, Attached gingiva, Marginal gingiva, and Interdental papilla

What attachments characterize the Gingiva?

Free gingiva and Attached gingiva

What indentation separates the free gingiva from the attached gingiva?

Free Gingival Groove

What is the Mucogingival Junction?

Separates the attached gingiva from the alveolar mucosa

What are the attachment mechanisms characterized by the Dentogingival Junction?

Epithelial Attachment and Connective Tissue Attachment

What are the Fundamental Compartments of the Dentinogingival Junction?

Junctional epithelium, Oral Sulcular Epithelium, and Oral Gingival Epithelium

What are the the description type of Epithelium in Histology of Gingiva?

stratified squamous type, smooth in free gingiva, stippled in attached gingiva

What tissue consist of Lamina Propria in Histology of Gingiva?

dense connective tissue

Where does the Innervation in Blood & Nerve Supply comes from?

terminal branches of periodontal nerve fibers and by the alveolar branches of the infraorbital and palatine or lingual, mental & buccal nerves

What are the types of Gingival Ligament / Supra-Alveolar Fiber Apparatus?

Dentogingival fibers, Dentoperiosteal fibers, Alveologingival fibers, Circular & Semi-circular fibers, Transseptal fibers, Transgingival & Intergingival fibers, Interpapillary fibers, Periosteogingival fibers, Intercircular fibers

What are the Functions of the Supra-Alveolar Fiber Apparatus?

It supports the junctional epithelium, It gives the free segments of the marginal and interdental gingiva their characteristic turgor, resistance to tearing, and their flat shape, It secures against shearing forces, It attaches the gingival tissue to the supra-alveolar cementum and to the crest of the alveolar bone stabilizing the position of the teeth and unite the teeth of one jaw into a continuous dental arch

What is Passive Eruption?

The gradual exposure of the crown by the separation of the epithelial attachment from the tooth surface and by the recession of the gingiva.

What is the description of 1st Stage from Passive Eruption?

bottom of gingival sulcus is on enamel region & end of epithelial attachment is at CEJ

What is the description of 2nd Stage from Passive Eruption?

bottom of gingival sulcus still in enamel region, end of epithelial attachment is at cervical part of the root

What is the description of 3rd Stage from Passive Eruption?

bottom of the gingival sulcus is at CEJ, entire epithelial attachment is on cementum surface

What is the description of 4th Stage from Passive Eruption?

bottom of sulcus and epithelial attachment are on the cementum surface

What are the Systemic Diseases that are Manifested in Oral Mucosa?

Measles, Scarlet fever, Stomatitis, Gingivitis, and Glossitis