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Related Experiment Videos

A step function model using tooth counts to assess the developmental timing of the dentition.

C F Moorrees, R L Kent

    Annals of Human Biology
    |January 1, 1978
    PubMed
    Summary

    This study analyzed dental maturation by examining median ages of permanent tooth emergence. Variations in timing reveal individual differences in the overall dental development process.

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    Area of Science:

    • Dental development and human biology
    • Anthropology and forensic science

    Background:

    • Assessing dental maturation is crucial for understanding growth and development.
    • Previous methods often lack precision in quantifying individual variations.

    Purpose of the Study:

    • To develop a precise method for analyzing dental maturation using step functions.
    • To quantify variations in the timing of permanent tooth emergence.
    • To investigate individual differences in the duration of the dental emergence process.

    Main Methods:

    • Utilized step functions to represent median attainment ages for early and late-emerging permanent teeth.
    • Calculated displacements of step functions to determine variations in dental maturation.
    • Analyzed differences in displacements between early and late teeth to assess emergence duration.

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    Main Results:

    • Established distinct step functions for early-emerging (I1, I2, M1) and late-emerging (C, Pm1, Pm2, M2) teeth.
    • Quantified individual variations in dental maturation based on step function displacements.
    • Identified differences in displacements correlating with individual variations in the duration of tooth emergence.

    Conclusions:

    • The step function method provides a robust approach to assessing dental maturation.
    • Individual variations in dental emergence timing can be precisely measured.
    • This methodology offers insights into human growth and developmental trajectories.