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Practical Oral Histology
Revision
ORAL BIOLOGY
DEPARTMENT
Decalcified section
TOOTH DEVELOPMENT
Decalcified section (H&E) showing late
bell stage
Dental sac
Dental papilla
Outer enamel
epithelium
Stellate reticulum
Stratum
intermedium predentin
Odotoblast cells
Decalcified section(H&E)showing root
formation
Epithelial diaphragm
Dental papilla
odontoblast
predentin
dentin
bone
ENAMEL
GROUND SECTION
 Ground longitudinal section (G.L.S)
in enamel showing:
Gnarled
enamel
Enamel
lamella
Brown
striae of
Retzius
 Ground Transverse section (G.T.S)
in enamel showing:
Enamel
tufts
Enamel
lamella
A.D.JDentin
Ground section
DENTIN
 G.T.S in dentin showing:
Intertubular
dentin
Intratubular
dentin
Odontoblastic
process space
 G.L.S in dentin showing:
Interglobular
dentin space
1ry curvature
of dentinal
tubules
B.S. of
Retzius
Neonatal
line
CEMENTUM
GROUND SECTION
 G.L.S in cementum (apical 1/3)
showing:
Cellular cementum
Cementocyte
lacunae spaces
PULP
DECALCIFIED
SECTION
 Decalcified section (H&E) showing
pulp in situ:
Dentin
Odontoblasts
Cell free zonePredentin
C.T of the pulp
PERIODONTAL
LIGAMENT
DECALCIFIED
SECTION
Decalcified section (H&E) showing:
P.L. fibers
Root dentin
PDL
Alveolar
bone
Decalcified section
BONE
 Decalcified section (H&E)
showing:
Compact bone
Volkmann's canal
Haversian canal
Osteocyte
 Decalcified section (H&E)
showing:
Alveolar bone
D
Alv.
bone
PDL
EMBRYOLOGY
DECALCIFIED
SECTION
 Decalcified section (H&E) showing:
Coronal section of embryo
Nasal septum
Palatal shelves
Developing
tongue
 Decalcified section (H&E) showing:
Meckel's cartilage and developing
bone
Soft paraffin section
ORAL MUCOSA
Soft paraffin section (H&E) showing
Non-keratinized mucosa:
Soft paraffin section (H&E) showing
filiform & fungiform papillae:
2ry C.T papilla
1ry C.T
papilla
Decalcified section
Temporo-mandibular
joint
(T.M.J)
Decalcified section H&E showing:
T.M.J.
2
1
3
4
5
6
Decalcified section H&E showing:
T.M.J.
1. Articular fossa.
2. Articular disc.
3. Condyle.
4. Fibrous covering.
5. Hyaline cartilge.
6. Upper joint cavity.
THANK YOU

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Revision oral histology 2020