Oral Mucosa Flashcards
Masticatory Mucosa
KERATINIZED stratified squamos Contains Rete Pegs *Hard Palate *Attached Gingiva
Rete Pegs
Extensions of epithelium into the connective tissue. Downward thickening of epidermis Allows for larger surface area for attachement
Lining Mucosa
NON KERATINZED stratified squamos * Buccal * Labial
Specialized Mucosa
Taste buds Dorsum of the Tongue
Layers of Gingival Epithelium
Stratum Basales Stratum Spinosum Stratum Granulosum Stratum Corneum - bacteria attach here
What cells reside in the Stratum Basales?
Keratinocytes Melanocyte Langerhans Cell
What type of collagen fibers are found in the basement membrane?
Collagen III Collagen IV Collagen VII
What cellular structure is critical for the integration between CT and epithelial tissue?
Hemidesmosomes
What type of mucosal tissue is keratinized and what is it’s function?
Attached Gingiva, Palate, Free Gingiva Protects against abrasion and bacteria
What type of tissue is nonkeratinized?
Lining Mucosa - buccal and labial
What is parakeratinized tissue?
Tissue that is immaturely keratinized or non keratinized tissue undergoing an inflammatory response.
What does the PERIODONTIUM consist of?
Cementum Periodontal ligament Alveolar Bone (cortical bone) Gingiva * Attached * Free (marginal) * Interdental
What are the functions of periodontium?
Shock absorber, sensory input, tooth support, nutritive
ARMAD
A - Attachment
R - Resist
M - Maintain
A - Adjust
D - Defense
List 3 aspects of Gingival margin (free gingiva)?
Fits snuggly but not attached Located CORONAL to CEJ Can be pulled away with a probe Forms the soft tissue wall of the gingival sulcus
What is the normal range of the sulcus?
0 mm to 3 mm From pre gingival margin to junctional epithelium
What are the two types of gingival biotype?
Thin Thick
Thin gingival biotype
Can see probe tip, not ideal for crown placement ** can get inflamed easier Slender teeth
Thick gingival biotype
Healthy, ideal for crown placement Quadratic formed teeth
Sulcus
Healthy * Enamel and Nonkeratinized marginal gingiva *Semipermeable membrane
Unhealthy
What is at the bottom of the sulcus?
Junctional epithelium
What are properties of the wall of the sulcus (2)?
Non-keratinized Semipermeable
What is Gingival Crevicular Fluid?
Fluid found in the sulcus Cleanses the gingival sulcus Aids in adhesion Antibody defense Replaced several times a day GCF fluid represents extracellular fluid - per inflammatory. On stimulation it becomes the inflammatory exudate.
How is the fluid created?
Residential plaque has a high molecular weight. This pulls fluid out of the epithelium into the sulcus. Osmotic pressure…
Inflammation of sulcus
More bacteria pulling out more fluid
How do you collect gingival crevicular fluid?
Extracravicular - filter paper Intracrevicular - pipet, washings
What are two major components of gingival crevicular fluid?
Enzymatic - host or bacterial derived Non enzymatic - cellular, electrolytes, organic molecules
What are the layers of the Basal Lamina?
Lamina Lucida Lamina Densa Anchoring Fibers Lamina Fibroreticularis
What components do you find in the Lamina Lucida?
integrins laminins enactins dystroglycans
What components do you find in the Lamina Densa?
Collagen IV Perclan (non aggregating proteoglycans)
What components do you find in the Lamina Fibroreticularis?
Collagen III
What are the anchoring fibers ins the Basal Lamina?
Collagen VII Fibrillin
Periodontium does not include (4)?
Enamel Dentin Calcaneous bone Pulp
Why does the periodontium give sensory information?
Necessary for proper positioning of the jaw
What cells and compents are found in the gingival epithelium? (6)
Keratinocytes Melanocytes Desmosomes Tonofilaments (keratin) Basal Lamina Hemidesmosomes
FGM stands for?
Free Gingival Margin (Free Gingiva)
Gingival Margin
Where the free gingiva meets the tooth structure. Thin and rounded.
Label this image.
- Lining Mucosa (alveolar mucosa) 2. Mucogingival junction 3.
Label this image
- Gingival Sulcus 2. Marginal Gingiva 3. Marginal Groove 4. Attached Gingiva 5. Mucogingival Junction 6. Alveolar Mucosa
What is the main cell in connective tissue?
Fibroblasts
What layer of the epithelium is shed often?
Stratum Corneum - determines if keratinized, bacteria attach here.
Periodontal tissues are interdependent and are subject to variations and changes due to age or disease. T or F
TRUE
What are the anatomical areas of the gingiva (4)?
Gingival Sulcus
Attached Gingiva
Interdental Gingiva
Free Gingiva
What are the gingival boundaries? Coronal? Apical?
Coronal - Marginal Gingiva (margin)
Apical - Alveolar Mucosa
GCF pre-inflammatory is called?
Transduate
GCF - inflammatory is called a?
exudate
What will be increased in the GCF when there is inflammation?
Antibodies
