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The differences in calcium distribution pattern between preodontoblasts and preameloblasts in developing rat molar

Y Kogaya, K Furuhashi

    Calcified Tissue International
    |August 1, 1986
    PubMed
    Summary

    Calcium distribution differs between preodontoblasts and preameloblasts. Preodontoblasts show calcium in Golgi and intercellular spaces, while preameloblasts accumulate it in mitochondria and nuclei during tooth development.

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    Area of Science:

    • Cell Biology
    • Developmental Biology
    • Mineralization

    Background:

    • Understanding calcium localization is crucial for comprehending biomineralization processes in tooth formation.
    • Preodontoblasts and preameloblasts are key cells involved in dentin and enamel matrix secretion, respectively.

    Purpose of the Study:

    • To investigate the ultrastructural localization of calcium in preodontoblasts and preameloblasts.
    • To identify differences in calcium distribution patterns between these two cell types during tooth development.

    Main Methods:

    • Utilized the potassium pyroantimonate technique for ultrastructural localization of calcium.
    • Examined calcium distribution at the subcellular level in preodontoblasts and preameloblasts.

    Main Results:

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    • Preodontoblasts exhibited significant calcium deposits in the Golgi region, lateral intercellular spaces, and secretory granules.
    • Preameloblasts showed calcium primarily within mitochondria, nuclei, and on the inner plasma membrane.
    • Distinct differences in calcium distribution were observed between the two cell types, with minimal intercellular calcium in preameloblasts.

    Conclusions:

    • The study reveals differential calcium handling by preodontoblasts and preameloblasts, impacting dentin and enamel formation.
    • Calcium's specific intracellular and extracellular localization is cell-type dependent during early tooth mineralization.