open access

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Original article
Published online: 2021-04-29
Submitted: 2021-03-12
Accepted: 2021-04-19
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Relationship between mandibular symphysis dimensions and skeletal pattern in adults

H.Y.A. Marghalani1, G. Guan2, P. Hyun3, S. Tabbaa4, A. I. Linjawi1, T. Al-Jewair5
DOI: 10.5603/FM.a2021.0045
·
Pubmed: 33954960
Affiliations
  1. Orthodontic Department, Faculty of Dentistry King Abdulaziz University, P.O. Box 80209, 21589 Jeddah
  2. Department of Orthodontics, University of Pennsylvania, 240 S. 40th Street, 19104 Philadelphia, United States
  3. Private practice, Albany, NY, United States
  4. School of Orthodontics, Jacksonville University, United States
  5. Department of Orthodontics, School of Dental Medicine, University of Buffalo, NY, United States

open access

Ahead of Print
ORIGINAL ARTICLES
Published online: 2021-04-29
Submitted: 2021-03-12
Accepted: 2021-04-19

Abstract

Background: The knowledge of dimensions of the symphysis is important for morphological and orthodontic studies. This research evaluates the association between mandibular symphysis dimensions and anteroposterior and vertical skeletal patterns in adults. Materials and methods: This cross-sectional cephalometric study included 90 lateral cephalograms of untreated subjects presenting for orthodontic treatment. The inclusion criteria were adults with lateral cephalograms showing the symphyseal region and anterior cranial base. One investigator traced and analyzed all cephalograms. Symphyseal height, thickness, and ratio between height and thickness were measured in relation to seven anteroposterior and vertical skeletal measurements in females and males. Results: Symphyseal measurements were associated with SNAo (anteroposterior) in females and Gonial angle (vertical) in males. When analyzed by anteroposterior skeletal classification (ANBo), no significant differences in symphyseal dimensions were found. Multiple linear regression analyses showed that Gonion-Nerve (mm) and Gonial angle were significantly associated with symphyseal height. Gonion-Nerve (mm), basal bone width (mm), and alveolar bone height (mm) were associated with symphyseal thickness. Basal bone width (mm) and alveolar bone height (mm) were associated with symphyseal ratio. Conclusions: Symphyseal dimensions were significantly associated with vertical but not anteroposterior skeletal patterns. Future studies are warranted to evaluate the Gonion-nerve measurements concerning the symphysis in relation to vertical and anteroposterior skeletal patterns.

Abstract

Background: The knowledge of dimensions of the symphysis is important for morphological and orthodontic studies. This research evaluates the association between mandibular symphysis dimensions and anteroposterior and vertical skeletal patterns in adults. Materials and methods: This cross-sectional cephalometric study included 90 lateral cephalograms of untreated subjects presenting for orthodontic treatment. The inclusion criteria were adults with lateral cephalograms showing the symphyseal region and anterior cranial base. One investigator traced and analyzed all cephalograms. Symphyseal height, thickness, and ratio between height and thickness were measured in relation to seven anteroposterior and vertical skeletal measurements in females and males. Results: Symphyseal measurements were associated with SNAo (anteroposterior) in females and Gonial angle (vertical) in males. When analyzed by anteroposterior skeletal classification (ANBo), no significant differences in symphyseal dimensions were found. Multiple linear regression analyses showed that Gonion-Nerve (mm) and Gonial angle were significantly associated with symphyseal height. Gonion-Nerve (mm), basal bone width (mm), and alveolar bone height (mm) were associated with symphyseal thickness. Basal bone width (mm) and alveolar bone height (mm) were associated with symphyseal ratio. Conclusions: Symphyseal dimensions were significantly associated with vertical but not anteroposterior skeletal patterns. Future studies are warranted to evaluate the Gonion-nerve measurements concerning the symphysis in relation to vertical and anteroposterior skeletal patterns.

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Keywords

mandible, skeletal patterns, dimensions, symphysis

About this article
Title

Relationship between mandibular symphysis dimensions and skeletal pattern in adults

Journal

Folia Morphologica

Issue

Ahead of Print

Article type

Original article

Published online

2021-04-29

DOI

10.5603/FM.a2021.0045

Pubmed

33954960

Keywords

mandible
skeletal patterns
dimensions
symphysis

Authors

H.Y.A. Marghalani
G. Guan
P. Hyun
S. Tabbaa
A. I. Linjawi
T. Al-Jewair

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