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Related Experiment Videos

Dental development, dental age and tooth counts.

U Hägg, J Taranger

    The Angle Orthodontist
    |April 1, 1985
    PubMed
    Summary

    This study tracked tooth emergence in 212 Swedish children from birth to 18 years. Dental age assessment using tooth counts is a simple method, with girls generally ahead of boys in permanent tooth emergence.

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    Area of Science:

    • Pediatric Dentistry
    • Human Growth and Development
    • Biometrics

    Background:

    • Tooth emergence timing is a key indicator of child development.
    • Understanding sex-based differences in tooth eruption patterns is crucial for accurate age assessment.
    • Previous studies have established general timelines but lacked detailed longitudinal data for specific populations.

    Purpose of the Study:

    • To establish reference data for deciduous and permanent tooth emergence in Swedish children.
    • To analyze sex differences in tooth emergence timing.
    • To evaluate the validity and precision of dental age assessment using tooth counts.

    Main Methods:

    • Longitudinal study of 212 urban Swedish children from birth to 18 years.
    • Collection of emergence data for 20 deciduous and 29 permanent teeth.
    • Construction of tooth emergence curves and calculation of standard deviation scores for dental age.
    • Cross-sectional comparison to validate dental age assessment against chronological age.

    Main Results:

    • Statistically insignificant sex difference in deciduous tooth emergence (boys ahead until 17th tooth).
    • Significant sex differences in permanent tooth emergence (girls ahead, 3-11 months difference).
    • Dental age estimation using tooth counts showed a mean difference of approximately one month from chronological age.

    Conclusions:

    • Tooth emergence data provide a convenient and simple method for assessing dental development and dental age.
    • The method is particularly useful for cross-sectional studies in low-caries populations.
    • Individual dental age estimation precision varies, with higher variability in permanent dentition.

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