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Pulp
 

Pulp

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oma lab:))

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    Pulp Pulp Presentation Transcript

    • Pulp
      • The dental pulp is the soft connected tissue that supports the dentin.
    • Four distinct zone in pulp
      • Odontoblastic zone- at the pulp periphery
      • Cell free zone of Weil – beneath the odontoblast
      • Cell-rich zone – where the cell density is high
        • - seen easily in coronal pulp adjacent to the cell free zone
        • Pulp core – characterized by the major vessels and nerves of the pulp
    •  
    • Odontoblast
      • The most distinctive cell of the pulp and the most easily to recognized.
      • The number of odontoblast is estimated in a range of 59,000 to 76,000 per square millimeters in coronal dentin
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    • The cervical loop area: (1) dental follicle cells, (2) dental mesenchyme, (3) Odontoblasts, (4) Dentin, (5) stellate reticulum, (6) outer enamel epithelium, (7)inner enamel epithelium, (8) ameloblasts, (9) enamel.
    • Fibroblast
      • The cells occuring in greatest number in the pulp
      • Particularly numerous in coronal portion of the pulp, wherethey form the cell rich zone.
      • The function of fibroblast is to form and maintain the pulp matrix, which consist of collagen and ground substance.
      • Appear as flattened spindle-shaped cell with dense nuclei.
    •  
    • Undifferentiated ectomesenchymal cells
      • Represents the pool from which connective tissue cell of the pulp are derived.
      • This cell are found throughout the cell-rich area and the pulp core and often are related to blood vessels
      • Appear as large polyhedral cell possessing a large, lightly stained centrally placed nucleus.
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    • Macrophages
      • Tend to be located in the pulp center.
      • Appear as a large oval or spindled shaped cells.
      • Pulp macrophages are involved in the eliminations of dead cells
    •  
    • Lymphocytes
      • In normal pulps, T lymphocytes are found, but B lymphocytes are scarce.
    • Dendritic cells
      • Are found in and around the odontoblast layer in nonerupted teeth and in erupted teeth beneath the odontoblast layer.
      • Same function as Langerhans’ cells found in epithelium
    •  
    • Matrix and ground substance
      • The extracellular compartment of the pulp or matrix, consist of collagen fibers and ground substance.
      • The fibers are principally type I and type III collagen.
      • In young pulps, single fibrils of collagen are found scattered between the pulp cell.
    • Innervation of dentin-pulp complex
      • The dental pulp is innervated richly.
      • Nerves enter the pulp through the apical foramen, along with the afferent blood vessels, and together with the neurovascular bundles.
    •  
    • Dentin sensitivity
      • On of the unusual features of the pulp-dentin complex is the sensitivity.
      • The extreme sensitivity of this complex is difficult to explain, because this characteristics provides apparent evolutionary benefit.
    • Pulp stones
      • Pulp stone, or denticles, frequently found in pulp tissue
      • They are discrete calcified masses calcium-phosphorus rations comparable to that of dentin.
      • May contain tubules and may be surrounded by cells resembling odontoblast.
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