3. 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
12. 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
14. 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.
34. 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
35. 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
46. 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
63. 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
71. 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
89. Age Changes OfAge Changes Of
CementumCementum
D D
Localised
Hypercementosis
(excementosis(
1-Hypercementosis.
Generalized
Hypercementosis
90. 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
99. 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
112. 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
113. 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
132. 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
134. 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
138. 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
141. 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
149. 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
158. 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
161. 11––Alveolar Bone ProperAlveolar Bone Proper
Cribriform plate
Zuckerkandl &
Hirschfeild canals
☻Perforated with multiple foramina (so, called cribriform plate
168. 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
169. 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
170. (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)
176. (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
203. (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)
212. 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
222. 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
227. 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
228. 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
267. 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
268. 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
270. 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
285. 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
286. 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
310. N.B: FAT CELL MAY BEN.B: FAT CELL MAY BE
PRESENT IN SALIVARY GLANDSPRESENT IN SALIVARY GLANDS
311. 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
327. 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
328. 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
333. 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
367. Lining mucosa ( e.g. floor of the
mouth)
1- tissue
2- example
368. Dentin NOT presentDentin NOT present (cont.)(cont.)
Dentin NOT presentDentin NOT present (cont.)(cont.)
ITongue PapillaeTongue Papillae
Filiform Circumvallatefungiform Foliate
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
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
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