L1 Microscopic Anatomy Perio

What is basal lamina?

-thin mat of extracellular matrix secreted by epithelial cells supports overlying epithelium

-not visible

What is epithelial-connective tissue interface?

-site where epithelial and connective tissues meet

What is basement membrane?

-thin layer visible with light microscope beneath epithelium

-combination of basal lamina and reticular lamina

What is epithelial ridges or rete pegs?

-epithelial extensions reaching down into connective tissue

-correlated to gingival stippling in healthly perio

What is connective tissue papillae?

finger-like extensions projecting up into epithelium

What are the functions of epithelial connective tissue interface?

-enhances adhesion of epithelium to connective tissue by increasing surface area

-provides larger area to facilitates nutrient exchange.

What is Desmosomes?

-create cell to cell connection

-important form of cell junction found in gingival epithelium

What is Hemidesmosomes?

-important form of cell junction found in gingival epithelium

-create cell to basal lamina connection

What are the 3 anatomical areas of gingival epithelium?

-oral epithelium

-sulcular epithelium

-junctional epithelium

What is Oral epithelium?

-outer surface of free gingiva and attached gingiva from crest of margin to mucogingival junction

-4 layers

-keratinized

What is sulcular epithelium?

epithelial lining of the sulcus continuous with OE

-thin keratinized

-permeable, allows fluid flow

-3 layers (superficial, prickle, basal)

What is Junctional epithelium?

-base of the sulcus and joins gingiva to tooth

-slightly coronal to CEJ

-non-keratinized and semipermeable

-easiest entry point for bacteria into CT

-only has 2 layers (basal and prickle)

What are the three functions of JE?

-barrier

-attachement

-host defense