Odontoblasts Under a light microscope: The odotoblasts form a palisade arrangement at the pulp periphery. Pre-enamel neloblasts Pre-dentin Odontoblasts Forming tooth pulp
Odontoblasts Under a light microscope: Under a light microscope: ——The odotoblasts form a palisade arrangement at the pulp periphery
Odontoblasts The side and shape of the cells vary on their location: Coronal pulp-pseudostratified columnar or high columnar Radicular pulp-low columnar cuboidal Apex-flattened,almost squamous shape
Odontoblasts The side and shape of the cells vary on The side and shape of the cells vary on their location: their location: • Coronal pulp - pseudostratified columnar or high columnar • Radicular pulp - low columnar & cuboidal • Apex - flattened, almost squamous shape
Electron microscope: The large nucleus with a pear-shaped appearance,is located in the base of the cell. The cell body contains organelles that represent different stages of secretion of collagen, glycoproteins,and calcium salts
Electron Electron microscope: microscope: • The large nucleus with a pear-shaped appearance, is located in the base of the cell. • The cell body contains organelles that represent different stages of secretion of collagen, glycoproteins, and calcium salts
Odontoblasts The odontoblasts do not undergo mitosis and may therefore be considered postmitotic,or end cells. When they die,their function is carried out by neighboring odontoblasts or by new odontoblasts
• The odontoblasts do not undergo mitosis and may therefore be considered postmitotic, or end cells. • When they die, their function is carried out by neighboring odontoblasts or by new odontoblasts. Odontoblasts
Fibroblasts The fibroblasts are the principal cells distributed throughout the pulp. These cells exhibit wide variation in their degree of differentiation. Pulpal fibroblasts are spindle- shaped cells with ovoid nuclei. They produce gelatinous intercellular matrix and collagen fibers
Fibroblasts • The fibroblasts are the principal cells distributed throughout the pulp. • These cells exhibit wide variation in their degree of differentiation. • Pulpal fibroblasts are spindleshaped cells with ovoid nuclei. • They produce gelatinous intercellular matrix and collagen fibers