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Predicting the mandibular growth spurt.

Lorenzo Franchi, Michele Nieri, Irene Lomonaco

    The Angle Orthodontist
    |April 28, 2021
    PubMed
    Summary
    This summary is machine-generated.

    Chronological age, sex, and cervical vertebral maturation stage 3 (CS 3) effectively predict the pubertal growth spurt in the mandible. This model aids in anticipating peak mandibular growth during adolescence.

    Keywords:
    CVM methodCephalometricsMandibular growth spurt

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    Area of Science:

    • Orthodontics and Craniofacial Biology
    • Growth and Development Studies
    • Biostatistics

    Background:

    • Predicting the timing of the pubertal growth spurt is crucial in orthodontics for effective treatment planning.
    • The mandibular growth spurt significantly influences facial development and occlusion.
    • Existing methods for predicting growth spurts have limitations in accuracy and applicability.

    Purpose of the Study:

    • To develop and validate a predictive model for the pubertal mandibular growth spurt.
    • To integrate chronological age, sex, and cervical vertebral maturation (CVM) stages into a unified prediction model.
    • To enhance the accuracy of predicting peak mandibular growth velocity.

    Main Methods:

    • Analysis of 456 lateral cephalograms from 50 subjects (29 females, 21 males) across multiple growth studies.
    • Application of a multilevel logistic regression model to identify significant predictors.
    • Inclusion of chronological age (up to third order), sex, and cervical vertebral maturation stage 3 (CS 3) as predictive variables, including interaction terms.

    Main Results:

    • Cervical vertebral maturation stage 3 (CS 3) was identified as a key indicator, with 78% of subjects showing peak mandibular growth after this stage.
    • Chronological age, sex, second-order age effects, and the interaction between age and sex were statistically significant predictors.
    • The mean age at the growth peak was approximately 12.1 years for females and 13.2 years for males.

    Conclusions:

    • A combination of CS 3, chronological age, and sex provides a robust model for predicting the pubertal mandibular growth spurt.
    • This integrated approach offers improved predictability compared to using individual factors alone.
    • The findings support the clinical utility of CVM staging in conjunction with age and sex for orthodontic growth prediction.