Pulp

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Author:
svisperas
ID:
91733
Filename:
Pulp
Updated:
2011-06-22 23:31:07
Tags:
Oral Biology
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Description:
Pulp
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  1. Pulp has what 3 functions?
    • Sensory
    • Nutritional
    • Protective
  2. The Pulp Chamber has 2 main divisions:
    • Coronal (Crown)
    • Radicular (Root)
  3. Pulp Chamber
    • Contains the mass of the pulp
    • Shape is individualized
    • Has TWO main divisions:
    • Coronal
    • Radicular
  4. Coronal Pulp
    • Located in the crown
    • Pulp horns extend in the cusps of posterior teeth (Buccal cusp of premolars & mesiobuccal cusp of molars)
  5. Radicular Pulp
    • aka "Root Pulp/ Pulp Canal"
    • Extends from the Coronal pulp to the apex
  6. Apical Foramen
    • Opening from the pulp at the apex
    • Surrounded by cementum
    • Allows nerves to enter and exit from the PERIODONTAL LIGAMENT
  7. Accessory Canals
    • Aka "Lateral Canals"
    • Extra openings
    • HERS encounters a blood vessel during root formation
  8. Types of CELLS in the pulp
    • Fibroblasts
    • Odontoblasts
    • Undifferentiated Mesenchymal
    • White & Red blood cells
  9. Fibroblasts
    Largest group of cells
  10. Odontoblasts
    • Second largest group of cells
    • Along the outer pulpal wall
  11. Undifferentiated Mesenchymal Cells
    Transform into fibroblasts and odontoblasts during injury
  12. Types of FIBERS in pulp
    • Collagen
    • Reticular
    • *NO ELASTIC FIBERS*
  13. Types of NERVES in pulp
    • Myelinated (axons of sensory or afferent neurons)
    • Unmyelinated
  14. Pulps Stones
    • aka DENTICLES
    • Masses of calcified dentin
    • Free or Attached
    • Formed during tooth development and aging
    • Radiopaque
  15. FOUR microscopic zones
    • Odontoblastic
    • Cell-Free
    • Cell-Rich
    • Pulpal Core
  16. Odontoblastic Layer
    • Closest to the dentin
    • Lines the outer pulp wall
    • Forms secondary or tertiary dentin
    • Has the MOST cells
  17. Cell-Free Zone
    • Not "cell free"
    • No secondary or tertiary dentin
    • Newly formed dentin may encroach on this zone
  18. Pulpal Core Zone
    The most innermost zone of the pulp
  19. Pulpitis
    • Inflammation of the pulp
    • Occurs with : Extensive caries, Cavity prep, Traumatic injury
  20. Reversible Pulpitis
    • Pain occurs when a stimulus is applied to the tooth
    • TREATMENT: Caries removal
  21. Irreversible Pulpitis
    • Pain occurs spontaneously
    • Hard to locate
    • TREATMENT: Root canal or extraction
  22. AGE related changes in pulp
    • Becomes more fibrotic
    • Reduced regenerative capacity
    • Pulp cavity becomes smaller

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