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Related Experiment Video

Updated: Jul 19, 2026

The Establishment of a Murine Maxillary Orthodontic Model

The Establishment of a Murine Maxillary Orthodontic Model

Published on: October 27, 2023

Mandibular growth during adolescence.

Aisha Souza Gomes¹, Eduardo Martinelli Lima

¹Departamento de Ortodontia, Pontificia, Universidade Catolica do Rio Grande do Sul, Brazil. aishagomes@hotmail.com

The Angle Orthodontist

|October 13, 2006

Summary

Mandibular growth in white adolescents shows significant individual variation. Annual growth rates for mandibular body length, ramus height, and overall mandibular length were observed, with no significant differences noted between sexes or skeletal patterns.

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Last Updated: Jul 19, 2026

The Establishment of a Murine Maxillary Orthodontic Model

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Published on: October 27, 2023

Measuring Maxillary Posterior Tooth Movement: A Model Assessment using Palatal and Dental Superimposition

Measuring Maxillary Posterior Tooth Movement: A Model Assessment using Palatal and Dental Superimposition

Published on: February 23, 2024

Area of Science:

Orthodontics
Craniofacial growth
Human biology

Background:

Understanding mandibular growth patterns is crucial for orthodontic diagnosis and treatment planning.
Fishman's method provides a framework for categorizing individuals based on their growth velocity phase.

Purpose of the Study:

To evaluate the mandibular growth of white individuals using Fishman's method.
To analyze annual growth rates of mandibular linear dimensions during puberty.

Main Methods:

Retrospective analysis of lateral head films and hand-wrist radiographs from 85 white subjects (9-18 years).
Subjects categorized into three growth velocity phases (accelerating, peak, decelerating) using Fishman's method.
Cephalometric analysis to determine annual growth rates (mm/y) for mandibular body length, ramus height, and mandibular length.

Main Results:

Average annual mandibular growth rates were 2.16 mm/y (body length), 3.16 mm/y (ramus height), and 4.31 mm/y (mandibular length).
No statistically significant differences in growth rates were found between sexes, Class I vs. Class II skeletal patterns, or the three growth velocity groups.
A trend towards accelerated growth was observed in the peak growth velocity group (Group II).

Conclusions:

Mandibular linear growth exhibits substantial individual variability during adolescence.
Fishman's method, while categorizing growth phases, did not reveal significant differences in linear mandibular growth rates within this cohort.