مراجعة عملى هيستولوجى سنه ثانيه جديد معدل
TRANSCRIPT
Bud stage
Cap stage
Stellate reticulum
Outer dental epithelium
Inner dental epithelium
Dental papilla
Dental sac
Enamel cord
Early bell stage
Early bell stage
Early Bell stage
Dental papilla
Lateral dental lamina
Cervical loop
Stellate reticulium
Dental papilla
Primordium of permanent tooth
Dental sac
Advanced Bell StageAdvanced Bell Stage
Stratum intermedium
Ameloblasts
Predentin
Outer dental epithelium
Stratum intermedium
Dental papilla
Advanced Bell Stage
Stratum intermedium
Enamel matrix
Dentin
Predentin
Odontoblasts
Enamel matrix
Ameloblast
Stratum intermedium
Enamel matrix
Dentin
Outer enamel epithelium
Reduced enamel epithelium
Dentine
Developing pulp
Enamel matrix
Enamel matrix
Predentin
Odontoblast
Epithelial Diaphragm
Epithelial Diaphragm
Ameloblasts
Cervical loop
Epithelial diaphragm
Predentin
Dentin
Predentin
Predentin
Globular mineralization of dentin
Odontoblasts
Odontoblasts
Enamel spindle
Enamel lamella
Hunter-Schreger BandsHunter-Schreger Bands
Incremental lines of Retzius
DEJ
Dentinal tubules
Incremental Lines of Retzius
Enamel tuft
Pulp in situ
Dentin
Cementum
Periodontal ligamet
Enamel lamella
Enamel spindle
Dentinal tubule
Neonatal line
Interglobular dentin space
Interglobular dentin space
Dentino-enamel junction
Incremental lines of von Ebner
Secondary dentin
Sclerotic dentin
Dead tract
Reparative dentin
Secondary dentin
Tomes’ granular layer
Dentinal tubules
Cellular cementum
Acellular cementum
Acellular cementum
Tomes’ granular layer
Acellular cementum
Cellular cementum
Cellular Cementum
Lacuna of cementocyte
Lacunae &canaliculi of cementocytes
Incremental lines of Salter
L.S ground section showing:ATLAS
• A- cementum overlaps enamel 60%• B- cementum meets enamel 30%• C- no junction(gap junction) 10%
Attached cementicle
Hypercementosis
D
Pre D
Odontoblasts
Cell Free Zone
Cell Rich Zone
Core
Diffuse pulp calcification
True denticle
Pulp stone
Osteoblast
Osteoclasts
Howships lacuna
ERM
ERM
ERM
The remnants of the epithelial root sheath of Hertwig migrate toward the dental sac and become the epithelial rests of Malassez found in the periodontal ligament of the fully developed tooth.
A-Epithelial rests of Malassez
B-cementum
Epithelial rests of Malassez
Oblique fibers Malassez’ restAlveolar bone
Dentin
Alveolar crest group
Horizontal fibers
Gingival ligament
Alveolar crest (group) fibers
Alveolar process
Bundle bone
Acellular cementum
Interstitial tissue space
Transeptal Fibers
Oblique fibers
Interradicular fibers
Horizontal fibers
Apical fibers
Oblique fibers
Horizontal fibers
Alveolar process
Alveolar process
Bundle bone
Bundle bone
Bundle bone
Bundle bone
Interstitial tissue space
Bundle bone
Compact bone
Haversian system
Haversian canal Haversian system
Haversian canal
Volkman’s canal
Interstitial lamellae
Bone lamella Lacuna of osteocyte
Haversian canal Osteocyte
Compact bone
Osteocyte osteoblast
Spongy bone
Fiboblasts
Stratified Squamous Keratinized Epithelium
Stratified Squamous Keratinized Epithelium
Keratin layer
Stratified Squamous Keratinized Epithelium
Stratified squamous non keratinized epithelium
Gingiva
Gingiva
Gingiva
Gingiva
Vermilion border
Lining mucosa
Skin side
Skin side of the lip
Sebaceous gland
Hair follicle
Stratum cornium
Vermilion border
Vermilion border
Masticatory mucosa of the hard palate
Hard palate
Mucous acini
Lining mucosa of lip
Labial gland
Orbicularis oris muscle
Lining mucosa of cheek
Buccal gland
Soft palate
Lining mucosa
Lining mucosa
Labial mucosa
Oral vestibule
Free gingiva
Gingival sulcus
Sulcular epithelium
Enamel space
Attachment epithelium
Free gingiva
Gingival sulcus & enamel space
Free gingival groove
Junctional epithelium
CementumJunctioal epithelium on cementum
Junctional epithelium on cementum
Attached epithelium
Attached epithelium
Epithelial diaphragm
Interdental septum
Filiform papillae
Filliform papilla
Filiform papilla
Fungiform papilla
Fungiform papilla Taste buds
Filiform papillaFungiform papilla
Fungiform papilla
Tate bud
Fungiform papilla
Fungiform papilla
Circumvallate papilla
Circumvallate papilla
Circumvallate papilla
Foliate papilla
Taste bud
Taste bud
Taste bud
Taste bud
Taste pore
Taste bud
Taste buds
von Ebner S. G.
Serous acini
Serous salivary gland
Intercalated duct
Intercalated ducts
Zymogen granules
Serous salivary gland
Mixed salivary gland
Mucous acinus
Serous acinus
Mucous acinus
Serous acinus
Zymogen granules
Mixed salivary gland
Mucous acinus
Serous acinus
Mixed salivary gland
Mixed salivary gland
Serous demilune of vonEbner
Serous salivary gland
Buccal salivary gland (mixed)
Mucous acini
Serous acini
Striated muscle fibers
Serous acinus Mucous
acinus
Mixed salivary gland predominantly serous) submandibular gland(
Intercalated duct Serous acinus
Mucous cells
Mixed salivary gland
Mucous terminal portion
Intercalated duct
Serous acinus
Striated duct
Mixed salivary gland
Intercalated duct
Striated ducts
Mixed salivary gland (major sublingual )
Serous acinus
Mixed terminal portion
Serous demilunes
Serous acinus
Mixed acinus
Mixed salivary gland
Intercalated duct
Adipose tissue
Serous gland
Striated duct
Mucous acinusIntercalated
duct
Mixed salivary gland ( Submandibular)
Large inter-lobar excretory duct
C.T. stroma
Mixed salivary gland
Excretory duct
Goblet cell
Striated duct
Serous salivary gland
Striated ducts
Mucous acini
Serous aciniMixed salivary gland
Striated ducts
Interalated duct
Mixed salivary gland
Mucous acinus
Intercalated duct
Striated duct
Mixed salivary gland(submandibular gland)
Striated duct
Mixed salivary gland
Parotid gland Adipose tissue
Excretory ductParotid gland
Excretory duct
Intercalated duct
Serous acinus Demilunes of von Ebner
Serous acinus
Mucous acinus
Mixed salivary gland
Striated duct
Mucous acinus
Demilune of von Ebner
Demilune of von EbnerMixed salivary gland
Excretory duct
Serous acinus
Demilune of von EbnerMixed salivary gland
Tooth germ of deciduous predeccessor
Tooth germ of permanent successor
Tooth germ of
permanent successor
Erupting permanent successor
Shedding of predecessor
Decalcified H & E stained section showing shedding of deciduous tooth
During the intraosseous phase, the rate averages 1-10 um per day, it increases to about 75 um per day
once the tooth escapes from its bony cell.
Tooth eruption
Key: 1 = milk teeth; 2 = developing adult teeth; 3 = jaw bone; 4 = gum1 mm
1 1
2
2 2
3
33
4
4
Tooth eruption
Osteoclasts erode jaw bone to make way for erupting adult tooth
Eruption
Reduced enamel epithelium
Erupting deciduous
tooth
Meckel’s cartilage
Meckel’s cartilage
Nasal septum
Palatine process
Psuedo-stratified ciliated epitheliumPsuedo-stratified ciliated epithelium
Lining of maxillary sinus
Lining of maxillary sinus
Lining of maxillary sinus
Lining of maxillary sinus
Goblet cell
Articular eminence
Articular disc
Condyler head
Articular disc)meniscus(
Condylar head
Glenoid fossa
ORAL BIOLOGYORAL BIOLOGYDEPARTMENTDEPARTMENT