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Oral Mucosa
Dr. Mahmoud Bakr
School Of Dentistry and Oral health
Griffith University
Member of the Australian Dental Association (ADA),
Australian Biology Institute Inc. (ABI), and the Egyptian
Dental Union (EDU).
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Oral mucous membrane
Protection Secretion
Sensory Thermal
regulation
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Stratified Squamousepithelium
Epithelium
Papillary layer
Reticular
layer
Lamina propria
(C.T.)
Submucosa
Mucosa
Histological Structure:
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K.st .sq .epith
Non.K.st.sq.epith
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Class i f ication o f oral mucous
membrane
1-Keratenized mucosa ( Masticatory mucosa)
(A) Gingiva (B) Hard palate
2- Non-keratenized mucosa (Lining mucosa)
(A) Firmly attached (B) Loosely attached
Soft
palate lip cheeck Ventral Stongue
Floor of
mouth Vestibule
Alveolar
mucosa3- Specialized mucosa
Dorsal surface of the tongue
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Keratinized
St. Sq. Epith.
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Nonkeratinized
St. Sq. Epith.
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Keratenized mucosaNon-keratenized mucosa
OrthokeratinParakeratin
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Macro-anatomy of the gingiva
Free gingiva
Free
gingival
groove
Interdental
papilla
Attached
gingivaMucogingival
junction
Alveolar
mucosa
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Interdental papilla and gingival Col
Gingival col( non-
keratenized)
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Histology of gingiva
Stratified squamouskeratenized epithelium
Lamina propria
Epithelial rete peg
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Gingival fibers
Dento-gingival group
Alveolo-gingival group
Circular group
Dento-periosteal group
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Macroanatomy of palate
Incisive papilla
Palatine gingiva
Antro-lateralarea (fatty
zone)
Postro-lateral
area
(glandular
zone)
Rugae area
Median
palatine
raphe
Soft palate
Uvula
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Hard Palate Macro-anatomy
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Histology of hard palate
Submucosa
Fatty zone
Glandular zone
Mucosa
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Hard Palate Micro-anatomy
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Soft palate
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Oral sideNasal side
Respiratory epithelium
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LipVermilion border
Mucous side
Skin side
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The Lip
Skin Side
epidermis
(stratum lucidum)
Eliadin
•Hair follicles
•Sweat glands
• Sebaceous glands
Hair papilla
Hair root
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Skin appendages
Hair follicle
Sebaceous gland
Sweat
glands
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Cheek mucosa
N o n k e r a
t e n i z e d
e p i t h e l i u m
Mixed
salivary
gland
L l Att h d “M bl ”
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Alveolar mucosa
Floor of the mouth
Vestibular fornix
Loosely Attached “Movable”mucosa
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ventral surface ofthe tongue
Firmly attached to underlying musclesThin non.kert. st.sq. epith.
Saw-teeth appearance of epith ridges
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Tongue papillae
1- Filliform pap. 2- Fungiform pap.
4- Folliate pap.
3- Circumvallate pap.
Taste bud
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Filiform papillae
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Fungiform papillae
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Circumvallate papillae
“SEM”
von Ebner salivary glnds
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Circumvallate papilla
Trough
Circumv ll t
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Von Ebnersalivary
gland
Circumvallatepapillae
trough
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Foliate papillae
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Taste Bud
SEM
H & E stain
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Taste bud
3- Neuroepithelial cell
1- Outer supporting cell
2- Inner supporting cell
Taste pore
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Posterior Third of Tongue
lymphatic part
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Lingual cryptLymphatic nodules(follicles)
Weber salivary glands
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Dento-gingival junction
Gi i l S l & D t i i l J ti
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Gingival Sulcus & Dentogingival Junction
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Histology of Dento-gingival junction