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Morphogenesis of the mouse coronal suture

V A Johansen, S H Hall

    Acta Anatomica
    |January 1, 1982
    PubMed
    Summary
    This summary is machine-generated.

    The study reveals that the osteogenic induction front (OIF) overlapping, not the fusiform blastema, establishes coronal suture structure in mice. This finding clarifies the developmental sequence of cranial suture formation.

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    Area of Science:

    • Craniofacial Development
    • Skeletal Biology
    • Developmental Biology

    Background:

    • The coronal suture's morphogenesis is crucial for skull development.
    • Previous theories suggested the fusiform blastema dictates suture location and plate positioning.

    Purpose of the Study:

    • To histologically investigate the morphogenesis and maturation of the coronal suture in C57Bl-strain mice.
    • To clarify the sequence of events in coronal suture development, specifically the roles of the osteogenic induction front (OIF) and fusiform blastema.

    Main Methods:

    • Light microscopy was used to examine coronal suture development.
    • Histological analysis was performed from day 15 postconception to day 71 postpartum in mice.

    Main Results:

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    • Osteoid precursor differentiation formed an osteogenic induction front (OIF).
    • The OIFs of the parietal and frontal bones approached in different dorsoventral planes before physical overlap.
    • The fusiform configuration of the fibrous capsule (fusiform blastema) occurred after OIF overlap.

    Conclusions:

    • The relative physical overlapping of the OIFs, not the subsequent fusiform blastema, establishes the coronal suture's structure.
    • The parietal OIF is consistently located dorsal to the frontal OIF during development.
    • This study redefines the primary event in coronal suture morphogenesis.