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Related Experiment Videos

Eruption rates of human upper third molars.

B K Berkovitz, T P Bass

    Journal of Dental Research
    |May 1, 1976
    PubMed
    Summary

    Human third molars erupt at varying speeds, with maximum eruption rates linked to dental spacing. Gingival recession also contributes to crown exposure, influencing the clinical appearance of these teeth.

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    Area of Science:

    • Dentistry
    • Oral Biology
    • Human Anatomy

    Background:

    • Understanding tooth eruption dynamics is crucial for orthodontics and restorative dentistry.
    • Maxillary third molars (wisdom teeth) exhibit unique eruption patterns.
    • Gingival recession can alter the perceived eruption status and clinical crown height.

    Purpose of the Study:

    • To investigate the eruption rates of human maxillary third molars.
    • To identify factors associated with variations in eruption speed.
    • To assess the role of passive eruption and gingival recession in clinical crown exposure.

    Main Methods:

    • Observational study analyzing eruption rates in human subjects.
    • Measurement of tooth movement over time.
    • Correlation analysis between eruption rates and dentition spacing.
    • Assessment of gingival recession and its impact on crown visibility.

    Main Results:

    • Maximum eruption rates for maxillary third molars were observed to be approximately 1 mm per 2 months.
    • Slower eruption rates, less than 1 mm per 6 months, were also documented.
    • A positive association was found between maximum eruption rates and the presence of spacing in the dentition.
    • Gingival recession was identified as a significant factor in the exposure of the clinical crown.

    Conclusions:

    • Eruption rates of human maxillary third molars are variable and influenced by dentition spacing.
    • Passive eruption, manifesting as gingival recession, plays a key role in revealing the clinical crown.
    • These findings have implications for understanding third molar development and potential orthodontic interventions.

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