Chapter 2 Flashcards
Skin and oral mucosa are….
Stratified squamous epithelium, aka, flat cells arranged in layers.
What is the purpose of keratinization?
Process that makes surface epithelial cells stronger and waterproof.
What is the purpose of non-keratinized epithelial cells? Where could you find these cells?
Cushions mechanical stress and wear, and could be found in mucosal lining of cheeks.
Are there blood vessels in epithelial tissue?
NO
Epithelial cell junctions mechanically attach a cell and it’s cytoskeleton to:
Neighboring Cells and Basal Lamina
What is the strongest epithelium to withstand severe mechanical stresses have the most number of cell junctions ?
Skin
Desmosome:
Connects two neighboring epithelial cells
Hemi-Desmosome:
Connects epithelial cells to basal lamina.
What are the cells of the connective tissue and what are their functions?
Fibroblasts -Fiber Builders
Macrophages and Neutrophils: phagocytes that devour dying cells and invasive microorganisms.
Lymphocytes: cells of the immune system.
What dental tissues are labeled as connective tissue?
Cementum, Dentin, Pulp
Is it better to have a smooth boundary or a wavy boundary?
Wavy! Better adhesion by increasing the surface area.
What are the three anatomical areas of the gingival epithelium?
- Oral Epithelium
- Sulcular Epithelium
- Junctional Epithelium
What are the three main functions of the JE?
- Provides seal at the base of the gingival sulcus.
- Protective barrier between plaque and biofilm
- Can release substances that activate body’s defense system if needed.
What composes the dentogingival unit ?
Junctional epithelium and gingival fibers.
The gingival margin is ____ in health.
Wavy
Facts about sulcular epithelium.
- thin and non keratinized.
- Permeable , fluid can flow from connective tissue.
- smooth interface in health.
Junctional Epithelium Facts
- Forms the base of the sulcus.
- Easiest point of entry for bacteria to invade connective tissue.
- The attachment of the gingiva to the tooth where we stop when probing.
Functions of the Junctional epithelium:
- Provides seal
- Protective layer between plaque and biofilm.
- Releases substances that activate the body’s defense system.
JE + Gingival Fibers=
Dentogingival Unit
What does the dentogingival unit do?
Provides structural support to gingival tissue.
Alveologingival
Connects the bone to the gingiva
Transseptal
Connects adjacent teeth to one another.
Alveolar Crest Fibers of the PDL
Resists horizontal tooth movements.
Horizontal fibers of PDL
Resists horizontal pressure against crown of tooth.
Oblique Fibers of the PDL
Resists vertical pressures that threaten to drive the root into its socket.
Apical Fibers of the PDL
Secures tooth in its socket and resists forces that might lift the tooth from its socket.