practical

ORAL HISTOLOGY

DEVELOPMENT OF THE TOOTH

ENAMEL

DENTINE

PULP

CEMENTUM

P.D.L

Alveolar bone

Oral Mucosa Practical class

OF ORAL MUCOSA ALL SLIDES

Oral mucosa

Foliate papillae

•Form ridges on posterior lateral surface of tongue•Functional and noticeable papillae in the neonate

that are reduced in size as one ages

Serous glands

Dorsal

ducts

Taste buds

The superficial cells are dead but retain the nucleus in parakeratinized epithelium but the nuclei are lost in

orthokeratinized epithelium.The rete pegs are long and slender in keratinized

epithelium

Orthokeratinized epithelium Parakeratinized epithelium

Para keratinized epithelium

Lip

Minor SalivaryGlands

Mucosa

Hair Follicles

b) Vermillion zone: is the red border of the skin

NOTE: most of the skin is a keratinized SSE

a) Skin

Muco-cutaneous junction (wet/dry)

Inner side of lip.C: labial gland

A: Epitheliu

mB: Lamina

Propria

Buccal mucosaA: Buccinator

MuscleBuccal

Salivary gland

Circumvallate PapillaFoliate P.

Fungiform P.

Filiform P.Body

Root

Lingual papillae, taste buds, lingual glands, lingual tonsils

Lingual tonsilPalatine

tonsilSulcus terminalis

Taste & sensation

Tongue (Specialized mucosa)

Circumvallate papilla

Taste buds

Serous glands(Von Ebner’s)

Dorsal

Serous glands wash substances from taste buds and secrete lipase, which prevents a hydrophobic layer from forming over the taste buds

Stratified sequamous keratinized epithelium

Filiform papilla

Filiform

Fungiform

Taste bud

DorsalFungiform papilla

SEM

Highly vascular lamina propria

Foliate papillae

•Form ridges on posterior lateral surface of tongue•Functional and noticeable papillae in the neonate

that are reduced in size as one ages

Serous glands

Dorsal

ducts

Taste buds

Attached gingiva with Para keratinized epithelium

A:epithelial Ridge B: Lamina Propria C: Surface Of EpitheliumD: Epithelium

Gingiva

A: junctional epithelium.B: cement

Glandular zone of H.Palate

A=Palatine glands

B=Palatine raphe

Hard palate: C: Fatty zoneArrow =traction bands

B: Bone A: Space

D:blood Vessle

Mucous salivary ringPalatine glands superiorlyWeber’s gland at root of

tongue inferiorlyGlossopalatine glands on

the sidesHelps for swallowing

Taste budsA= Supporting cells ;B=Taste pore,

Ripe tomatoes, which are rich in umami components

Lingual tonsilsand Weber’s gland

Heinrich Wilhelm Gottfried von Waldeyer-Hartz

Salivary gland practice 2014/4/6

•Largest gland but makes only ~25% of saliva•Secretes into Stenson’s duct•All serous cells with much adipose tissue•Synthesizes amylase and secretory IgA •Mumps: viral infection (inflammation & pain; facial nerve involved)

Parotid gland Fat cellDuct systemSerous acini

Sublingual glands. A=mucous acini; B=Duct;arrow=Serous demilune

PAS stain

Submandibular glandA=serous acini;MA=Mucous acini;SD=serous demiluneID=intercalatedduct SD

MA

AID

Striated ducts (Submandibular gland)Basal striations

Semi-thin section of serous cells

Lip and labial glands

Minor SalivaryGlands