Gingival Histology (Killeen) Flashcards
Gingival Epithelial cell types
Keratinocytes
Langerhans cells
Merkel cells
Melanocytes
Keratinocytes
Principal cell type in gingiva
Synthesize keratin
Proliferation of Keratinocytes
Mitosis in basal layer
Some remain to proliferate
Larger cells migrate to surface
Melanocytes
Synthesize melanin
Differentiate to dendritic cells: located in basal and spinous layers
Langerhans Cells
Important in the Immune response
Act as APCs for lymphocytes
Merkel Cells
Located in deeper layers of epithelium
Harbor nerve endings: tactile receptors
Connected to adjacent cells by desmosomes
All epithelial cells are
Metabolically active
Protection in function
Oral epithelium has pominent ____
Rete pegs
Order of Keratinization
Hard palate
Gingiva
Ventral tongue
Buccal mucosa
Sulcular Epithelium
Nonkeratinized
Lines gingival sulcus
Has potential to become keratinized
Stratified squamous
Sulcular epithelium lacks ____, and ____
Rete pegs
Merkel cells
Junctional Epithelium
Nonkeratinzed Attached to tooth via basal lamina No rete pegs Stratified squamous Protects against plaque and bacteria
Internal basal lamina
Lamina densa + Lamina lucida
Lamina densa
Adjacent to tooth
Reinforced by gingival fibers
Lamina lucida
Attached by hemidesmosomes from JE
Dental cuticle may be between tooth basal lamina
External basal lamina
Attaches JE to CT
Continuous with Sulcular epithelium
Dental cuticle
Layer of protein which may or may not be present on enamel
Non-mineralized
Dentogingival unit = ____
JE + Gingival fibers
JE attaches to ____
CT attaches on ____
Enamel
Cementum
Biologic width
Combination of JE and CT attachment
Must not be invaded by restoration, crown margins, etc.
GCF
Cleansing material
Contains plasma proteins
Antimicrobial properties
Supports antibody activity
Dentogingival fibers are located:
Facial surfaces
Lingual surfaces
Interproximal surfaces
Circular fibers are located:
Within CT of marginal and interdental gingiva
Transseptal fibers are located:
Interproximally from cementum to cementum
