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Related Experiment Video

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Characterizing mandibular growth using three-dimensional imaging techniques and anatomic landmarks.

Michael P Kelly1, Houri K Vorperian1, Yuan Wang2

  • 1Vocal Tract Development Laboratory, Waisman Center, University of Wisconsin-Madison, 1500 Highland Ave., Rooms 429/427, Madison, WI 53705, USA.

Archives of Oral Biology
|February 6, 2017
PubMed
Summary
This summary is machine-generated.

This study used 3D models to analyze mandibular growth, revealing distinct patterns in horizontal and vertical planes. Sexual dimorphism in mandible shape emerges during puberty, providing key developmental data.

Keywords:
3DCTDevelopmentMandibleMeasurement

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Area of Science:

  • Craniofacial biology
  • Developmental biology
  • Biomedical imaging

Background:

  • The mandible's multi-planar growth is complex and not fully quantified.
  • Understanding mandibular development is crucial for clinical assessment and craniofacial studies.
  • Sexual dimorphism in mandibular morphology requires detailed ontogenetic analysis.

Purpose of the Study:

  • To quantitatively assess multi-planar mandibular growth using 3D models.
  • To characterize the emergence of sexual dimorphism in the developing mandible.
  • To establish normative data for craniofacial growth and clinical applications.

Main Methods:

  • Generated 104 3D mandible models from CT scans of 51 individuals (1-19 years).
  • Defined six linear and three angular measurements using 11 landmarks.
  • Analyzed growth trends, rates, and types (neural/cranial vs. somatic/skeletal) and assessed sex differences across age cohorts.

Main Results:

  • Mandibular growth and growth rates were non-uniform across planes.
  • Horizontal structures showed neural/cranial growth; vertical structures showed somatic/skeletal growth.
  • Prepubertal sex differences resolved and re-emerged during and after puberty.

Conclusions:

  • 3D analysis provides quantitative data on mandibular development.
  • This study offers preliminary normative data for clinical assessment.
  • Findings contribute to understanding craniofacial growth and sexual dimorphism.