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Related Experiment Videos

Scanning electron microscopy of developing human deciduous incisor teeth.

J R Van Treese, R B Paulson, K Rossie

    Archives of Oral Biology
    |January 1, 1986
    PubMed
    Summary

    Human incisor development shows distinct growth patterns from fetal stages. Mineralization begins in central incisors, with mesio-distal and occluso-cervical growth defining five developmental stages and leading to tooth asymmetry.

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    Area of Science:

    • Dentistry
    • Developmental Biology
    • Human Anatomy

    Background:

    • Understanding human tooth development is crucial for diagnosing developmental anomalies.
    • The prenatal period is critical for dental formation, influencing lifelong oral health.

    Purpose of the Study:

    • To analyze the mesio-distal and occluso-cervical growth patterns of human fetal incisors.
    • To identify distinct developmental stages in incisor formation.
    • To investigate the morphological changes at the developing incisal edge.

    Main Methods:

    • Measurement of mineralized incisor parts in 17 human fetal dentitions (15-38 weeks gestation).
    • Comparative analysis of contralateral teeth within the same dental arch.
    • Observation of mineralization sequence and growth rates.

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    Main Results:

    • Mineralization initiated in central incisors, followed by lateral incisors, with similar development rates.
    • Early mesio-distal enamel growth was followed by significant occluso-cervical development.
    • Five developmental stages were identified, characterized by lobe-specific growth directions (mesial incisally, distal distally).

    Conclusions:

    • Human incisor development follows a predictable pattern with mirror-image morphology in contralateral teeth.
    • Distinct growth phases and lobe-specific contributions result in the characteristic asymmetry of incisors.
    • These findings provide a baseline for understanding normal incisor morphogenesis.