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Correlation between symphyseal morphology and mandibular growth.

Mahkameh Moshfeghi1, Mahtab Nouri2, Sanam Mirbeigi3

  • 1Department of Oral and Maxillofacial, Shahid-Beheshti University of Medical Sciences, Tehran, Iran.

Dental Research Journal
|August 7, 2014
PubMed
Summary

The symphyseal ratio, a measure of mandibular morphology, significantly correlates with mandibular growth patterns (MGPs) in adolescents. This finding is crucial for understanding facial development and orthodontic treatment planning.

Keywords:
Horizontalmandibular growthsymphysisvertical

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Area of Science:

  • Orthodontics
  • Craniofacial Morphology
  • Adolescent Growth

Background:

  • Mandibular growth patterns (MGPs) influence facial development.
  • Symphyseal morphology is a key indicator of mandibular structure.
  • Understanding the relationship between symphysis and MGP is vital.

Purpose of the Study:

  • To investigate the association between symphyseal morphology and different MGPs in adolescents.
  • To determine if symphyseal parameters can predict or correlate with specific mandibular growth tendencies.

Main Methods:

  • Compared symphyseal parameters (height, depth, ratio) in normal subjects versus four malocclusion groups (Cl II/III vertical/horizontal).
  • Matched 15 samples per group for sex and cervical maturation stage (CVMS) using cephalograms.
  • Utilized two-way ANOVA and Dunnett's method for statistical analysis (P < 0.001).

Main Results:

  • A significant correlation (P < 0.001) was found between the symphyseal ratio (Height/Depth) and MGP.
  • Vertical MGPs (Cl II/III) showed a smaller symphyseal ratio.
  • Horizontal MGPs (Cl II/III) exhibited a larger symphyseal ratio compared to normal controls.
  • Females demonstrated a greater symphyseal ratio.

Conclusions:

  • Symphyseal ratio is a strong indicator of an adolescent's mandibular growth pattern.
  • This relationship has implications for diagnosing and managing orthodontic cases.