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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

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