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