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Suruedee Chinthakanan - Chiang Mai Universityweb1.dent.cmu.ac.th/mis/dentelearning/uploads/... ·...
Transcript of Suruedee Chinthakanan - Chiang Mai Universityweb1.dent.cmu.ac.th/mis/dentelearning/uploads/... ·...
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Structures of teethSuruedee Chinthakanan
Oral biology and Oral diagnostic sciences department
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Outline • Position of teeth
• Blood supply
• Nerve supply
• Structures of teeth
• Periodontium
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Position of teeth
www.salisburyhouseclinic.co.uk
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Position of teeth
client.myoptumhealth.com skullanatomy.info
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Position of teeth
en.wikipedia.org
Maxilla
Mandiblewww.nlm.nih.gov
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Position of teeth
www.toothclub.gov.hk
• Incisors
• Canines
• Molars
Midsagittal plane
I:C:M = 2:1:2
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Position of teeth
• Incisors
• Canines
• Premolars
• Molars
www.toothclub.gov.hk
I:C:P:M = 2:1:2:3
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www.oralanswers.comwww.identalhub.com
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Succedaneous & Nonsuccedaneous tooth
Ten Cate R., 2013
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Succedaneous tooth
“A permanent tooth that succeeds
an exfoliated deciduous tooth”
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Drake R.L., 2010
External carotid artery
Blood supply
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Blood supply : max. teeth
Drake R.L., 2010
Ant.sup.alveolar a.
Post.sup.alveolar a.
Maxillary artery
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Blood supply
Drake R.L., 2010
Inferior alveolar artery
External carotid artery
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Drake R.L., 2010
External jugular vein
Blood supplyMaxillary vein
Pterygoid plexus
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Nerve supply
Drake R.L., 2010
Trigeminal nerve
Maxillary nerve
Ant. Sup. Alveolar n.
middle Sup. Alveolar n.
Post. Sup. Alveolar n.
Foramen rotundum
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Nerve supply
Drake R.L., 2010
Mandibular nerve
Inferior Alveolar n.
Trigeminal nerve
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Innervation
Drake R.L., 2010
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Lymphatic drainage• Submandibular nodes
• Submental nodes
• Deep cervical nodes
Drake R.L., 2010
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Oral cavity
Drake R.L., 2010
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Oral cavity
• Teeth
• Bones
• Supporting tissues of the tooth
• Oral mucosa
• Salivary glands
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Teeth
expertbeacon.com
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Structures of teeth
• Enamel
• Dentin
• Dental Pulp
• Cementum
en.wikipedia.org
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Enamel
• covering for the crown of the teeth
• most highly mineralized tissue in the body
• Ameloblasts : enamel formation
• nonvital and insensitive matrix
• cannot be replaced or regenerated
en.wikipedia.org
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Enamel
• Inorganic material : 96%
• Hydroxyapatite crystals
• Organic material : 1%
• Soluble & non-soluble protein
• Water : 3%
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Enamel 2.5mm
• Most thickness at cusp/ incisal edge• Less thickness at Cervical line
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Enamel
Reduced thickness in aging Translucent
light yellow to gray-white
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Structures of teeth
• Enamel
• Dentin
• Dental Pulp
• Cementum
en.wikipedia.org
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Dentin
• the bulk of the tooth
• bonelike matrix characterized
• dentinal tubules
• Odontoblasts: dentin formation
en.wikipedia.org
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Dentin
Dentinal
Tubule
Odontoblastic
process
http://tuberose.com/Graphics/DentinalTubules.jpg
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Ten Cate R., 2013
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Dentin• Inorganic material : 70%
• Hydroxyapatite crystals
• Organic material : 20%
• 90% : Collagen (mainly type I)
• Non-collagenous matrix protiens and lipids
• Water : 10%
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Dentin
• Hardness
• Support enamel
• elasticity provides flexibility and prevents fracture of the overlying brittle enamel.
Enamel Dentin Bone
sites.google.com
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Dentin
More yellow in Aging
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Dentin
Discoloration of dentinin tooth with pulp disease
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Dentin
• Primary dentin• Most of the tooth
• Circumpulpal dentin(outlines the pulp chamber )
• Secondary dentin• Less regular tubular structure than 10 dentin
• Tertiary dentin• Reactive or Reparative dentin
• Reaction to various stimuli
Ten Cate R., 2013
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Junction : DEJ -- CDJ
dentin
cementum
CDJCementodentinjunction en.wikipedia.org
DEJDentinoenameljunction
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Structures of teeth
• Enamel
• Dentin
• Dental Pulp
• Cementum
en.wikipedia.org
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Dental pulp
• soft connective tissue : supports the dentin
• principal cells : Odontoblasts, Fibroblasts, etc.
• Collagen fiber
• Blood supply
• Nerve supply
en.wikipedia.org
www.juniordentist.com
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Dental Pulp
• Generate Dentin surround Dental Pulp
• secondary and tertiary Dentin
• Circulation
• Tooth sensation
• Temperature
• Pain
en.wikipedia.org
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Pulp cavity
• Pulp chamber
• Root canal
• Apical foramen
Pulp chamber
Root canal
Apical foramen
CEJ
what-when-how.com
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Pulp cavity
http://what-when-how.com/dental-anatomy-physiology-and-occlusion
Pulp chamber
Root canal
Apical foramen
studydroid.com
Pulpal floor
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Dental pulp
• Soft C.T. contained in pulp cavity
• Coronal pulp
• Radicular pulp
• Pulpal horn Coronal pulp
Radicular pulp
Pulpal horn
CEJ
what-when-how.com
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Dental pulp
bdsinsights.blogspot.com
Coronal pulp
Radicular pulp
Pulpal horn
studydroid.com
Pulpal floor
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Structures of teeth
• Enamel
• Dentin
• Dental Pulp
• Cementum
en.wikipedia.org
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Cementum
• Cover overall root surface
• Light yellow color
• Most thickness at root tip
Ten Cate R., 2013
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Cementum
• Similar to bone
• Inorganic material : 45-50%
• Hydroxyapatite crystals
• Organic material : 50%
• Collagen (mainly type I)
• Noncollagenous matrix protiens
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Cementum
www.kck.usm.my
• Two types of cementum
• Cellular cementum
• Acellular cementum
• Hardness
Enamel Dentin cementum
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CEJ
Cementoenameljunction
Ten Cate R., 2013
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Tooth supporting structures
• Periodontal ligament
• Alveolar bone
• Gingiva
Ten Cate R., 2013
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Mineral in hard tissues
Hard tissue Hydroxyapatite
Enamel > 90%
Dentin 67%
Cementum 45% to50%
Bone 50% to60%
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Periodontal ligament
• PDL space 0.15-0.38 mm
• Collagen fiber
• Gel-like incompressible matrix
• receptor
Ten Cate R., 2013
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Alveolar bone
• Surrounding bone
• Attachment of PDL
• Root like shape
• Resorption after extraction
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Alveolar bone drramseyamin.typepad.com
www.lookfordiagnosis.com
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Gingiva
• Soft tissue cover alveolar bone
• Unstable position
• Not fully-eruption
• Gingival enlargement
• Gingival recession / Bone resorption
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Gingiva
http://www.oralhealthnet.co.uk/detail/3/gum-recession/
http://img.medscape.com/pi/emed/ckb/dermatology/1048885-1079711-1720.jpg
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Anatomical aspect
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Anatomical aspect
• Crown
• Anatomical crown
• Clinical crown
• Root
• Anatomical root
• Clinical root
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CEJ
“Cementoenamel junction/cervical line”
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Anatomical aspect
• Crown
• Anatomical crown
• Clinical crown
• Root
• Anatomical root
• Clinical root
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Crown:Root
Anatomical Crown
Anatomical Root
Clinical Crown
Clinical Root
CEJ
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Conclusion
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Position of teeth
• Maxilla
• Mandible
en.wikipedia.org
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Conclusion • Structures of teeth
• Enamel ; Dentin ; Dental pulp ; Cementum
• Tooth supporting structures
• PDL ; Alveolar bone ; Gingiva
• Blood and nerve supply
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Mineral in hard tissuesHard tissue Hydroxyapatite
Enamel > 90%
Dentin 67%
Cementum 45% to50%
Bone 50% to60%
Enamel Dentin Bone cementum
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References1.Anne M.R. Agur : Grant’s atlas of anatomy, 9thed. Williams&Wilkins, A waverly company, 1991.
2.Ash M. Major, Nelson J. Stanley : Wheeler’s Dental Anatomy, Physiology, and Occlusion, 8thed. Saunders, Saint Louis,Missouri,1993.
3.Ben Pansky : Review of Gross Anatomy, 6thed. McGraw-Hill, Health professions Division, 1996.
4.Klaus H., Edith M. Rateitschak, Herbert F. Wolf, Thomas M. Hassell : Color Atlas of Dental Medicine 1 Periodontology, 2nd ed. Thieme Medical Publishers, Inc., New york, 1989.
5.Richard Ten Cate, et. al : Oral histology, development, structure and function, 5thed. Saint Louis, C.V. Mosby, 8th ed, 2013.
6.Robert C. Zeisz, James Nuckolls : Dental Anatomy, The Form and Function. Henry Kimpton, 25 Bloomsbury Way, W.C.1, London, 1949.
7.Nelson SJ. Wheeler's dental anatomy, physiology, and occlusion. 10th ed. St. Louis: Elsevier; 2016:1-19. 2.
8. ชชัรี สชุาติล ้าพงศ,์บรรณาธิการ: ต าราทนัตกายวิภาคศาสตร์ประยกตุ,์ พิมพค์ร้ังท่ี 1 กรุงเทพมหานคร: บณัฑิตดีไซน;์ 2535
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