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‫الرحيم‬ ‫الرحمن‬ ‫ال‬ ‫بسم‬‫الرحيم‬ ‫الرحمن‬ ‫ال‬ ‫بسم‬
introductionintroduction
SLIDE
I. Ground II. Decalcified
CementumEnamel Dentin NOT presentDentin
present
Tooth dev.(except
late bell &root
formation.)
Embryology.
Mucous memb.
Salivary.
TMJ.
sinus
Tooth Around
tooth
CementumPulpDentin
PDL , DGJ , ALV. Bone & shedding
Dentin bone Dentin MAY
be present
bone
Ground section (enamel & dentin(
Ground section (enamel & dentin(
Ground section (cementum & dentin(
Ground section(reflected light(
Decalcified section (pulp(
Decalcified section (tooth, PDL &
bone(
Decalcified section (e.g.tooth dev.(
principlesprinciples
SLIDE
I. Ground II. Decalcified
CementumEnamel Dentin NOT presentDentin
present
Tooth dev.(except
late bell &root
formation.)
Embryology.
Mucous memb.
Salivary.
TMJ.
sinus
Tooth Around
tooth
CementumPulpDentin
PDL , DGJ , ALV. Bone & shedding
Dentin bone Dentin MAY
be present
bone
Incremental
lines
I. Ground Section
Enamel
tuft.
Enamel
Spindle
Enamel
Lamella
Hunter
Schreger
Bands
D.E.J.
Reflected
Light
L.S T.S T.S L.S T.S L.S T.S
A) Enamel Gnarled ,neonatal cross
striation & surface
L.S T.S
Enamel histology
Ground section Decalcified section
the organic substance is
burnt and the inorganic
substance will remain
inorganic substance
dissolve and the organic
contents remain.
The dentino-enamel junction
Incremental lines of RetziusIncremental lines of Retzius
Incremental lines of Retzius
Enamel lamella
Enamel tuft
E. tuft
E.
spindle
Enamel spindleEnamel spindle
Enamel spindleEnamel spindle
E. Spindle
HUNTER SCHREGER BANDS
Dark=(Diazone( light=(parazone(
Incremental
lines
I. Ground Section
Enamel
tuft.
Enamel
Spindle
Enamel
Lamella
Hunter
Schreger
Bands
D.E.J.
Reflected
Light
L.S T.S T.S L.S T.S L.S T.S
A) Enamel Gnarled ,neonatal cross
striation & surface
L.S T.S
Gnarled Enamel
Neonatal lineNeonatal line
GnarleGnarle
dd
enamelenamel D.E.JD.E.J
Neonatal lineNeonatal line
33--Neonatal lineNeonatal line
PRENATAL
ENAMEL
POSTNATAL
ENAMEL
POSTNATAL
ENAMEL
PRENATAL
ENAMEL
Surface structureSurface structureSurface structureSurface structure
1.1. Perikymata:Perikymata:1.1. Perikymata:Perikymata:
ASG
E. rod
end
perikymata
perikymata
SLIDE
I. Ground II. Decalcified
CementumEnamel Dentin NOT presentDentin
present
Tooth dev.(except
late bell &root
formation.)
Embryology.
Mucous memb.
Salivary.
TMJ.
sinus
Tooth Around
tooth
CementumPulpDentin
PDL , DGJ , ALV. Bone & shedding
Dentin bone Dentin MAY
be present
bone
 Of the crown
(mostly)
B) Dentin
 Of the
root
1. Tome's granular
layer1. Interglobular
D. spaces
T.S. Dentinal
Tubules G.S)
L.S. Dentinal
Tubules
+ 2ry curvature
2ry dentin (line of
demarkation)
1. Dead tract
2- sclerotic dentin
3- reparative dentin
Incremental lines
Dentinal tubules
L.S IN Dentinal tubules
L.S. in dentinal tubules (2ry curvature(
L.S in D.T.L.S in D.T.
(2ry(2ry
curvaturecurvature((
decalcified sectiondecalcified section
Sec.
curvatures
Terminal
branches
T.S. IN D.T.
B= INTERTUBULAR DENTIN
C= DENTINAL LUMEN
A=PERITUBULAR DENTIN
Intertubular D
Peritubular D
T.S in D.T
intertubular dentin
peritubular dentin
Odontoblastic process
D.T. (PeriOdontoblastic space(
T.S. IN D.T.
intertubular DENTINE
Incremental lines of dentineIncremental lines of dentine
 1-Incremental lines of1-Incremental lines of
von Ebnervon Ebner
 2- contour line of Owen2- contour line of Owen
22--Contour line of OwenContour line of Owen..
Incremental lines of von Ebner
N.B. the horizontal lines are LS in D.T.pulp
Contour line of OwenContour line of Owen..
Incremental lines of dentin (Owen(
Dead tractsDead tracts
ScleroticSclerotic
dentindentin
ReperativeReperative
debntindebntin
Dead tractDead tract
Sclerotic dentinSclerotic dentin
Primary
physiological
dentin
Regular secondary
dentin
Reparative
dentin
Dead tracts
ReparativeReparative
dentindentin
OdontoblastsOdontoblasts
Primary
physiological
dentin
Regular Secondary
dentin
Secondary dentinSecondary dentin
Line of demarcation bet 1ry and
2ry Dentin.
Primary
physiological
dentin
Secondary
dentin
Secondary DentineSecondary Dentine
Odontoblasts
Predentine
Globule of
calcification
 Of the crown
(mostly)
B) Dentin
 Of the
root
1. Tome's granular
layer1. Interglobular
D. spaces
T.S. Dentinal
Tubules G.S)
L.S. Dentinal
Tubules
2ry dentin (line of
demarkation)
1. Dead tract
2- sclerotic dentin
3- reparative dentin
Incremental lines
Tomes’ granular layer
INTERGLOBULAR D. SPACES
INTERGLOBULAR D. SPACES
INTERGLOBULAR D. SPACE
Interglobular D. spaces
interglobular dentine spaces
Interglobular dentinInterglobular dentin
SLIDE
I. Ground II. Decalcified
CementumEnamel Dentin NOT presentDentin
present
Tooth dev.(except
late bell &root
formation.)
Embryology.
Mucous memb.
Salivary.
TMJ.
sinus
Tooth Around
tooth
CementumPulpDentin
PDL , DGJ , ALV. Bone & shedding
Dentin bone Dentin MAY
be present
bone
Acellular
C) Cementum
Cellular
Sharpey's fiber
spaces
Incremental
lines of salter
T.S
L.S
Cementocytes
spaces (Lacunae)
Hypercementosis
Cellular
cementum
Acellular
cementum
SHRPEY’S FIBER SPACE
Sharpey’s fiber space
Acellular cementum
Tomes’ granular layer
INC LINES OF SALTER
In ACELLULAR C.
Incremental Lines Of SalterIncremental Lines Of Salter
In acellular C In cellular C
Lacuna of cementocyte
Lacuna of cementocyte
L.S. in DT
Acellular cementum Cellular cementum
Acellular cementum
Acellular cementum
ODONTOBLAST
predentin
ACELLULAR CEMENTUM
ODONTOBLAST
Cellular CementumCellular Cementum
Lacunae of cementocytes
PDL side
Dentin side
Cementocytes
Incremental lines of Salter
Lacuna of cementocyte
Age Changes OfAge Changes Of
CementumCementum
D D
Localised
Hypercementosis
(excementosis(
1-Hypercementosis.
Generalized
Hypercementosis
SLIDE
I. Ground II. Decalcified
CementumEnamel Dentin NOT presentDentin
present
Tooth dev.(except
late bell &root
formation.)
Embryology.
Mucous memb.
Salivary.
TMJ.
sinus
Tooth Around
tooth
CementumPulpDentin
PDL , DGJ , ALV. Bone & shedding
Dentin bone Dentin MAY
be present
bone
HAVERSIAN &HAVERSIAN &
OSTEOCYTEOSTEOCYTE
SPACESSPACES
(ground section(ground section((
Compact bone
LACUNAE ANDLACUNAE AND
CANALICULICANALICULI
GROUND SECTION
GROUND SECTION
Haversian canal
Lacuna of osteocyte
Haversian system
Volkmann’s canal
Volkmann`s canal
SLIDE
I. Ground II. Decalcified
CementumEnamel Dentin NOT presentDentin
present
Tooth dev.(except
late bell &root
formation.)
Embryology.
Mucous memb.
Salivary.
TMJ.
sinus
Tooth Around
tooth
CementumPulpDentin
PDL , DGJ , ALV. Bone & shedding
Dentin bone Dentin MAY
be present
bone
Odontoblastic
layer
Cell free
zone
Pulp core
(Blood
vessel)
[c] Pulp
 Pulp in situ.
Denticle
(Pulp
stone)
Cell rich
zone
 Detached Pulp (Pointer on same items) ????
lymph
vessel???
Pulp in situ
Free denticle (false)
BLOOD VESSEL
(PULP CORE
PREDENTIN
CELL FREE Z.CELL RICH Z. ODONTOBLAST
Blood vessel
fibroblast
Lymph vesselLymph vessel
Free denticle dentin
True pulp stone
False pulp stone
False pulp stone (free)
FreeFree
AttachedAttached
Attached denticle (falseAttached denticle (false((
FreeFree
AttachedAttached
SLIDE
I. Ground II. Decalcified
CementumEnamel Dentin NOT presentDentin
present
Tooth dev.(except
late bell &root
formation.)
Embryology.
Mucous memb.
Salivary.
TMJ.
sinus
Tooth Around
tooth
CementumPulpDentin
PDL , DGJ , ALV. Bone & shedding
Dentin bone Dentin MAY
be present
bone
Fibers (groups)
A) Dentin present (continued)
Gingival
group
(2) Around tooth
[a] PDL
cementicle
Alveodental
group
Transseptal
(interdental) group
Alveolar crest
group (fibers)
Horizontal
group (fibers)
Oblique group
(fibers)
Interradicular
group (fibers)
apical group
(fibers)
Interstitial
tissue
Malassez Sharpey’s
Dentin (1) & C.T. orDentin (1) & C.T. or
triangletriangle
GINGIVAL GROUP
GINGIVAL GROUP
22Dentin (separated)Dentin (separated)
& C.T. &/or BONE& C.T. &/or BONE
Dentin (CONNECTED &Dentin (CONNECTED &
SURROUND BONESURROUND BONE((
Interradicular fibers
N.BN.B..
OBLIQUE GROUP
))BONE SURROUNDSBONE SURROUNDS
DENTINDENTIN((
Apical fibers
‫طرقة‬‫طرقة‬
))BONE & DENTINBONE & DENTIN((
Alv. crest fibers
Horizontal fibers
Oblique fibers
TRANSSEPTAL GROUP
HORIZONTAL GROUP
Fibers (groups)
A) Dentin present (continued)
Gingival
group
(2) Around tooth
[a] PDL
cementicle
Alveodental
group
Transseptal
(interdental) group
Alveolar crest
group (fibers)
Horizontal
group (fibers)
Oblique group
(fibers)
Interradicular
group (fibers)
apical group
(fibers)
Interstitial
tissue
Malassez Sharpey’s
INTERSTITIAL TISSUE
Fibers (groups)
A) Dentin present (continued)
Gingival
group
(2) Around tooth
[a] PDL
cementicle
Alveodental
group
Transseptal
(interdental) group
Alveolar crest
group (fibers)
Horizontal
group (fibers)
Oblique group
(fibers)
Interradicular
group (fibers)
apical group
(fibers)
Interstitial
tissue
Malassez Sharpey’s
Epithelial Rests
dentine
bone
Epith. Rests of
Malassez
free
cementicle
Fibers (groups)
A) Dentin present (continued)
Gingival
group
(2) Around tooth
[a] PDL
cementicle
Alveodental
group
Transseptal
(interdental) group
Alveolar crest
group (fibers)
Horizontal
group (fibers)
Oblique group
(fibers)
Interradicular
group (fibers)
apical group
(fibers)
Interstitial
tissue
Malassez Sharpey’s
Sharpey’s Fibers
PDL FIBER
)Sharpey’s fiber(
osteocyte
SLIDE
I. Ground II. Decalcified
CementumEnamel Dentin NOT presentDentin
present
Tooth dev.(except
late bell &root
formation.)
Embryology.
Mucous memb.
Salivary.
TMJ.
sinus
Tooth Around
tooth
CementumPulpDentin
PDL , DGJ , ALV. Bone & shedding
Dentin bone Dentin MAY
be present
bone
Attachment epithelium
sulcular epithelium
Attachment epithelium
sulcular epithelium
Attachment epithelium
sulcular epithelium
Dento-gingival junctionDento-gingival junction
Gingiva
Gingival LigamentGingival Ligament
A= circular fibers
B= dentogingival fibers
C= dentoperiosteal fibers
D= alveologingival fibers
dentogingival
dentoperiosteal
Alveolar crest!!
SLIDE
I. Ground II. Decalcified
CementumEnamel Dentin NOT presentDentin
present
Tooth dev.(except
late bell &root
formation.)
Embryology.
Mucous memb.
Salivary.
TMJ.
sinus
Tooth Around
tooth
CementumPulpDentin
PDL , DGJ , ALV. Bone & shedding
Dentin bone Dentin MAY
be present
bone
Odontoclasts
D
P
PDL
odontoclasts
Howships lacuna
shedding
odontoclasts
Howships lacuna
A
Arrow: Howships lacuna
A: odontoclast
location: shedding
1: arrow 2: (A) 3: location
SLIDE
I. Ground II. Decalcified
CementumEnamel Dentin NOT presentDentin
present
Tooth dev.(except
late bell &root
formation.)
Embryology.
Mucous memb.
Salivary.
TMJ.
sinus
Tooth Around
tooth
CementumPulpDentin
PDL , DGJ , ALV. Bone & shedding
Dentin bone Dentin MAY
be present
bone
Alv bone proper
Zucker Kandle &
Hirschfeld canal
Alv bone proper
11––Alveolar Bone ProperAlveolar Bone Proper
Cribriform plate
Zuckerkandl &
Hirschfeild canals
☻Perforated with multiple foramina (so, called cribriform plate
No dentine =
No Zucker kandle & hirschfeld canal
Dr Rania Mossad
BundleBundle bonebone
Zucker Kandle & Hirschfeld canal
Bundle bone
A:Bundle bone / B: alveolar bone proper
A
B
Bundle boneBundle bone
Resting linesResting lines
bundle bone of Alv. bone proper
SLIDE
I. Ground II. Decalcified
CementumEnamel Dentin NOT presentDentin
present
Tooth dev.(except
late bell &root
formation.)
Embryology.
Mucous memb.
Salivary.
TMJ.
sinus
Tooth Around
tooth
CementumPulpDentin
PDL , DGJ , ALV. Bone & shedding
Dentin bone Dentin MAY
be present
bone
SLIDE
I. Ground II. Decalcified
CementumEnamel Dentin NOT presentDentin
present
Tooth dev.(except
late bell &root
formation.)
Embryology.
Mucous memb.
Salivary.
TMJ.
sinus
Tooth Around
tooth
CementumPulpDentin
PDL , DGJ , ALV. Bone & shedding
Dentin bone Dentin MAY
be present
bone
(Pointer(Pointer
on an item)on an item)
Dentin MAY be presentDentin MAY be presentDentin MAY be presentDentin MAY be present
No pointerNo pointer
(Pointer on an area)(Pointer on an area)
BoneBone
Compact
Spongy
IN COMPACT
Haversian
canal
Osteocyte
IN COMP.
OR
SPONG.
Resting
Line
Reversal
Line
IN SPONGY
Bone
trabecula
Marrow
cavity
OsteocyteVolkmann’s
canal
cells:
(osteoblast,
clast& cyte
&fibroblast)
Compact bone
(Cancellous, tubercular)(Cancellous, tubercular)
Dr Rania MossadDr Rania Mossad
Spongy boneSpongy bone
Spongy bone
Compact bone
Spongy bone
(Pointer(Pointer
on an item)on an item)
Dentin MAY be presentDentin MAY be presentDentin MAY be presentDentin MAY be present
No pointerNo pointer
(Pointer on an area)(Pointer on an area)
BoneBone
Compact
Spongy
IN COMPACT
Haversian
canal
Osteocyte
IN COMP.
OR
SPONG.
Resting
Line
Reversal
Line
IN SPONGY
Bone
trabecula
Marrow
cavity
OsteocyteVolkmann’s
canal
HAVERSIAN &HAVERSIAN &
OSTEOCYTEOSTEOCYTE
SPACESSPACES
osteocyte
Haversian canal
Haversian canal
osteocyte
Haversian canal
osteocyte
Haversian canal
osteocyte
Volkmann’s
canal
Volkmann’s canal
Do not forgetDo not forget::
Dentine may be presentDentine may be present
Haversian canal
Haversian canal
Lacuna of osteocyte
Haversian system
Volkmann’s canal
Volkmann`s canal
))trabeculae &trabeculae &
marrow cavitiesmarrow cavities((
osteocyte in Bone trabecula
Marrow cavity
Bone trabecula
Marrow cavity
MarrowMarrow
spacesspaces
osteocyteosteocyte
osteoblastosteoblast
Resting lineResting line
Reversal lineReversal line
Reversal line
Resting line
Reversal lines
Resting lines
Reversal lines
INCREMENTAL LINESINCREMENTAL LINES
2-REVERSAL LINE1-RESTING
LINES
 Resting linesResting lines
 Reversal linesReversal lines
Dr Rania MossadDr Rania Mossad
(Pointer(Pointer
on an item)on an item)
Dentin MAY be presentDentin MAY be presentDentin MAY be presentDentin MAY be present
No pointerNo pointer
(Pointer on an area)(Pointer on an area)
BoneBone
Compact
Spongy
IN COMPACT
Haversian
canal
Osteocyte
IN COMP.
OR
SPONG.
Resting
Line
Reversal
Line
IN SPONGY
Bone
trabecula
Marrow
cavity
OsteocyteVolkmann’s
canal
cells:
(osteoblast,
clast& cyte
&fibroblast)
Osteoclasts
2.2. OsteoblastsOsteoblasts
Dr Rania MossadDr Rania Mossad
4.4. OsteoclastsOsteoclasts
Dr Rania MossadDr Rania Mossad
*They are surrounded by bone
matrix, whether mineralized
or not.
fibroblast
Osteoclast
Osteoblast
Howships
lacuna
osteoclast
PDL FIBER
(Sharpey’s fiber)
osteocyte
SLIDE
I. Ground II. Decalcified
CementumEnamel Dentin NOT presentDentin
present
Tooth dev.(except
late bell &root
formation.)
Embryology.
Mucous memb.
Salivary.
TMJ.
sinus
Tooth Around
tooth
CementumPulpDentin
PDL , DGJ , ALV. Bone & shedding
Dentin bone Dentin MAY
be present
bone
EmbryologyEmbryology
Meckel’s
cartilage
Palatal shelves
Fused with N.
septum
Fused with N.
septum
Not Fused with N.
septum
Developing
mandible
Meckel’s
cartilage
Developing
mandible
tongue
Line of fusion
between palatal
shelves
palatal shelfs
Meckel’s cartilageDeveloping mandible
tongue
Palatal shelf
Meckel’s cartilage
Lingual NerveInferior Dental Nerve
Mechel’s
cartilage
LB
SLIDE
I. Ground II. Decalcified
CementumEnamel Dentin NOT presentDentin
present
Tooth dev.(except
late bell &root
formation.)
Embryology.
Mucous memb.
Salivary.
TMJ.
sinus
Tooth Around
tooth
CementumPulpDentin
PDL , DGJ , ALV. Bone & shedding
Dentin bone Dentin MAY
be present
bone
A: condylar head
B: articular eminence
C: glenoid
fossa
D:Articular disk
E: upper compartment
F: lower compartment
G: lateral pterygoid
TMJ
Articular disc
Mandibular
condyle
Articular
eminence
Articular disc
Mandibular
condyle
TMJTMJ
SLIDE
I. Ground II. Decalcified
CementumEnamel Dentin NOT presentDentin
present
Tooth dev.(except
late bell &root
formation.)
Embryology.
Mucous memb.
Salivary.
TMJ.
sinus
Tooth Around
tooth
CementumPulpDentin
PDL , DGJ , ALV. Bone & shedding
Dentin bone Dentin MAY
be present
bone
ADentin NOT present
(1) Tooth development
Dental
lamina
Bud
stage
Cap
stage
Early
bell
stage
Late
bell
stage
Root
formation
* Dental
organ
* Dental
lamina
* Inner
* Outer
* Stellate
* D. papilla
* D. sac
* Dental
lamina
* Cervical
loop
* Stratum
* Inner
* Outer
* Stellate
* D. papilla
* D. sac
* D.lamina
* Ameloblast
* Epith.
diaphragm
* D. papilla
* Od. blast
* Predentin
* Dentin
* E.space!!
* E. matrix
* Epith.
diaphragm
* Cervical
loop
Tongue
Palate
Dental lamina
Dental lamina
MAIN D. LAMINA
LATERAL D. LAMINA
2- BUD-STAGE.
ECTOMESENCHYMAL
CLUMPING (condensation)
D. ORGAN(BUD)
(BUD STAGE)
(CAP STAGE)
Enamel cord
Enamel knot
N.B.(E.cord may be in early bell stage alsoN.B.(E.cord may be in early bell stage also))
(cap stage)
Cell free zone
Stellate reticulum
Outer dental epithelium
Inner dental epithelium
Dental papilla
Dental sac
Early bell stageEarly bell stage
A-Deciduous tooth germ
Cervical Loop
Inner dental epithelium
Outer dental epithelium
Lateral dental lamina & successionalLateral dental lamina & successional
dental laminadental lamina
N.B.(E.cord may be in early bell stage alsoN.B.(E.cord may be in early bell stage also))
Enamel
cord
Lateral dental lamina
Enamel niche
SUCCESSIONAL LAMINA
Dental sac
Cervical loop
Cervical loop
Cervical loop
Cervical loop
Cervical loop
EARLY BELL
STAGE
1- STELLATE RETICULUM
2- OUTER D. EPITH.
3- INNER D. EPITH.
4- D. SAC
5- D. PAPILLA
6- CERVICAL LOOP
STRATUM INTERMEDIUM
STRATUM INTERMEDIUM
1- STELLATE RETICULUM
2- OUTER D. EPITH.
3- INNER D. EPITH.
4- STRATUM
INTERMEDIUM
5- ODONTOBLAST
Advanced Bell Stage
Advanced Bell Stage
Advanced Bell StageAdvanced Bell Stage
Lateral dental lamina
Successional lamina
Main dental lamina
Vestibular lamina
Dental lamina
dentin
Ameloblasts
Stratum intermedium
ADentin NOT present
(1) Tooth development
Dental
lamina
Bud
stage
Cap
stage
Early
bell
stage
Late
bell
stage
Root
formation
* Dental
organ
* Dental
lamina
* Inner
* Outer
* Stellate
* D. papilla
* D. sac
* Dental
lamina
* Cervical
loop
* Stratum
* Inner
* Outer
* Stellate
* D. papilla
* D. sac
* D.lamina
* Ameloblast
* Epith.
diaphragm
* D. papilla
* Od. blast
* Predentin
* Dentin
* E. space
* E.matrix
* Epith.
diaphragm
* Cervical
loop
1- D. PAPILLA
2- ODONTOBLASTS
3- PREDENTIN.
4- DENTIN
5- E. MATRIX
6- AMELOBLAST
**(E.SPACE MUST BE
AFTER DENTIN)
E. Space is
number . . . . ?
E. Space is number
4.5 !
7-stratum intermed
E. spaceE. space
ADVANCED BELL SATGEADVANCED BELL SATGE
Histological structure of the tooth germHistological structure of the tooth germ
ENAMEL
DENTIN
PREDENTIN
OUTER DENTAL
EPITHELIUM
CAPILLARY LOOP
SR
AB
SI
Odontoblast
ADentin NOT present
(1) Tooth development
Dental
lamina
Bud
stage
Cap
stage
Early
bell
stage
Late
bell
stage
Root
formation
* Dental
organ
* Dental
lamina
* Inner
* Outer
* Stellate
* D. papilla
* D. sac
* Dental
lamina
* Cervical
loop
* Stratum
* Inner
* Outer
* Stellate
* D. papilla
* D. sac
* D.lamina
* Ameloblast
* Epith.
diaphragm
* D. papilla
* Od. blast
* Predentin
* Dentin
* E. matrix
* E.space
* Epith.
diaphragm
* Cervical
loop
Epithelial Diaphragm
E = Epithelial diaphragm
EPITHELIALEPITHELIAL
DIAPHRAGMDIAPHRAGM
Histological structureHistological structure
OB
PD
D
DP
DS
ODE
SR
SI
AB
E.M
dentin
E. diaphragm
EPITHELIALEPITHELIAL
DIAPHRAGMDIAPHRAGM
Histological structureHistological structure
OB
PD
D
DP
DS
ODE
SR
SI
AB
E.M
Epithelial Diaphragm
Epithelial diaphragm
SLIDE
I. Ground II. Decalcified
CementumEnamel Dentin NOT presentDentin
present
Tooth dev.(except
late bell &root
formation.)
Embryology.
Mucous memb.
Salivary.
TMJ.
sinus
Tooth Around
tooth
CementumPulpDentin
PDL , DGJ , ALV. Bone & shedding
Dentin bone Dentin MAY
be present
bone
Striated Excretory
Dentin NOT presentDentin NOT present (cont.)(cont.)Dentin NOT presentDentin NOT present (cont.)(cont.)
③SalivarySalivary
No pointer
1. Pure Serous
Pointer
2. Pure mucous
3- mixed
4- mix pred
serous
5-Mixed Predominately Mucous
1. Acinus
2. Demilune of Von Ebner
3. Ducts
Mixed salivary G. Pure serous S.G.
Pure mucous
S.G.
04/25/1504/25/15 288288
Pure mucous gland
04/25/1504/25/15 291291
Serous gland
Pure serous gland
04/25/1504/25/15 293293
Mucous gland
04/25/1504/25/15 294294
Mixed salivary gland
Fibrous septum
04/25/1504/25/15 296296
04/25/1504/25/15 297297
Serous cap over mucous tubule
serous
Mucous
== mixed s. gland
Mucous terminal portion
== Pure mucous
Serous acinus
== mixed predominantly
serous s. gland
Mucous salivary gland
== mixed s. gland
== mixed s. gland
Mixed predominantly serousMixed predominantly serous
Mixed pred. mucous
(note the demilunes )
Mixed pred. mucous
(note the demilunes )
Mixed pred. mucous
(note the demilunes )
Mixed predominantly serousMixed predominantly serous
N.B: FAT CELL MAY BEN.B: FAT CELL MAY BE
PRESENT IN SALIVARY GLANDSPRESENT IN SALIVARY GLANDS
Striated Excretory
Dentin NOT presentDentin NOT present (cont.)(cont.)Dentin NOT presentDentin NOT present (cont.)(cont.)
③SalivarySalivary
No pointer
1. Pure Serous
Pointer
2. Pure mucous
3- mixed
4- mix pred
serous
5-Mixed Predominately Mucous
1. Acinus
2. Demi Lune of Von Ebner
3. Ducts
Demilune of von Ebner
Serous cap over
mucous blind end
Striated duct
Exc duct
Striated duct
Striated duct
Excretory duct
Exc ducts
Exc duct
Striated duct
Striated duct(B)
Exc duct
intercalated duct
Mixed predominantly serous eg:Mixed predominantly serous eg:
submandibularsubmandibular
1- tissue
2- example
11--tissuetissue
2- lining cells2- lining cells
3-arrow3-arrow
Excretory duct—pseudostratified
columnar epith with goblet cells
Goblet
cell
A: mucous terminal portion in mixed acinus
A
1- A
04/25/1504/25/15 325325
Intercalated
duct
04/25/1504/25/15 326326
Myoepithelial
cells
SLIDE
I. Ground II. Decalcified
CementumEnamel Dentin NOT presentDentin
present
Tooth dev.(except
late bell &root
formation.)
Embryology.
Mucous memb.
Salivary.
TMJ.
Sinus (resp.
mucosa)
Tooth Around
tooth
CementumPulpDentin
PDL , DGJ , ALV. Bone & shedding
Dentin bone Dentin MAY
be present
bone
Dentin NOT presentDentin NOT present (cont.)(cont.)
I -I - Covering MucosaCovering Mucosa
Mucous MembraneMucous Membrane
Skin
side of
the lip
Lining
mucosa
Hard Palate Gingiva orthokeratinized parakeratinized
Respiratory
mucosa
Resp. mucosa (pseudostratified ciliated
columnar epithelium with goblet cells..e.g.
max. sinus)
Goblet cell
cilia
Goblet cell
Nasal sideNasal side Respiratory epithelium
Dentin NOT presentDentin NOT present (cont.)(cont.)
I -I - Covering MucosaCovering Mucosa
Mucous MembraneMucous Membrane
Skin
side of
the lip
Lining
mucosa
Hard Palate Gingiva orthokeratinized parakeratinized
Respiratory
mucosa
Skin side of the lip
Hair follicle
Sebaceous gland
Sweat gland
Skin side of the lip
Hair follidle
The LipThe Lip
Skin SideSkin Side
Vermilion zoneVermilion zone
Mucous MembraneMucous Membrane
sideside
Sebaceous
glands
salivary
glands
epidermis
( stratum lucidum)
eleidin
Seat & sebaseous
glands
thick nonkeratinized
st. sq. epithelium
dense collagen f.
minor salivary glands
Thin epith, thin keratin layer,high C.T. papillae, many b.v.
)occasional Fordyce spots(
Vermilion border 1
Vermilion border 2Vermilion border 2
Hair follicleHair follicle
VermilionVermilion
border 3border 3
Hard palate (glandular zone)
Mucous glands (palatine glands)
Keratin layer
Adipose tissue
Adipose tissue
Hard palate (glandular zone)
Mucous glands (palatine glands)
Adipose tissue
Hard palate (fatty and
glandular zones)
Gingiva
Gingiva
GingivaGingiva
Parakeratin (containing nuclei)
Gingiva
orthokeratinized stratified squamous epithelium
Parakeratin
Parakeratinized stratified squamous epithelium
Lining mucosa
Lining mucosa ( non k epith)
orthoorthokeratinizedkeratinized paraparakeratinizedkeratinized
nonkeratinocyte
Prickle cell
layer
A: basal cell layer B: prickle cell layer
C.T. papillaC.T. papilla
Rete pegRete peg
Lamina propriaLamina propria
(reticular layer(reticular layer))
Lining mucosa ( e.g. floor of the
mouth)
1- tissue
2- example
Dentin NOT presentDentin NOT present (cont.)(cont.)
Dentin NOT presentDentin NOT present (cont.)(cont.)
ITongue PapillaeTongue Papillae
Filiform Circumvallatefungiform Foliate
Tongue papillae
1-Filliform pap. 2-Fungiform pap.
4-Folliate pap.
3-Circumvallate pap.
Filiform papillae
Filiform papillae
Gingiva (if no pointer + no dentine)
(if no pointer+ dentine present=ging.&D.G.J
Fungiform papilla
Fungiform papillae
Taste bud
11--structurestructure
2- location2- location
11--structure: fungiformstructure: fungiform
2- location: dorsal surface of ant. 2/3 of2- location: dorsal surface of ant. 2/3 of
tonguetongue
Fungiform papilla
secondary papilla
Fungiform papilla
Fungiform papilla
filiform
fungiform
foliate
Secondary papilla
Taste bud in foliate
Circumvallate papilla
Circumvallate papilla ( t. bud)
von Ebner S. G.
Taste bud (in circumvallate)
Von Ebner S.gland
foliateCircumvallate
von Ebner S. G.
furrow
von Ebner S. G.
11--arrow (taste bud)arrow (taste bud)
2- location (eg: fungiform papilla2- location (eg: fungiform papilla((
Taste bud
Taste pore
Keratenized and non-keratenizedKeratenized and non-keratenized
mucosamucosa
Keratenized mucosaNon-keratenized mucosa
OrthokeratinParakeratin
Types of KeratinizationTypes of Keratinization
orthoorthokeratinized orkeratinized or paraparakeratinizedkeratinized
Hard Palate
Lining mucosa
The LipThe Lip
Skin SideSkin Side
Vermilion zoneVermilion zone
Mucous MembraneMucous Membrane
sideside
Sebaceous
glands
salivary
glands
epidermis
Hair follicles,
Sweat & sebaseous
glands
thick nonkeratinized
st. sq. epithelium
dense collagen f.
minor salivary glands
Thin epith, thin keratin layer,high C.T. papillae, many b.v.
)occasional Fordyce spots(
LipLip
Vermilion border
Mucous side
Skin side
Soft palate
Soft palateSoft palate Oral side
Postgrad. 2013

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Editor's Notes

  1. After get formation of dentin starting, get the root sheath breaking away from dentin … but the cells stick around through adulthood Called epithelial rests … no body knows what they do Epithelium trapped in connective tissue If these get trapped, can become cystic Can be responsible for some forms of periapical reticular cysts
  2. Think of in terms of insertion into bone Interstitial tissue Collagen fibes Polarized light micrograph Notice that collagen fibers insert into bone on right and into cementum on left On right, see collagen fibers extending into mineralized tissue Portion of pdl that is trapped within cementum or alveolar bone proper Can imagine that as these are broken down, must keep reinserting new fibers Alveolar bone proper – has bundles of fibers … called bundle bone
  3. The large central space is a resorption area where young compact bone is being actively remodeled. This is an area where osteoclasts are resorbing the bony substance; notice to large multinucleated osteoclasts toward the left of the cavity next to the intact Haversian system that lies in the upper left corner of the field. Later, osteoblasts will differentiate from the primitive reticular tissue in the resorption cavity and will begin to lay down new bony lamellae around the edge of the cavity. As successive lamellae are laid down, the cavity will gradually grow smaller, until eventually a new Haversian system with a narrow central canal will be formed. Slide 75