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Quantitative analysis of frontal facial asymmetry for patients with hemifacial microsomia

Authors :
Tomoko Sonoda
Masamitsu Uji
Hiroyoshi Hiratsuka
Kenji Nakamori
Takatoshi Yotsuyanagi
Itaru Nagai
Tomohiro Igarashi
Hironari Dehari
Kazuhiro Ogi
Akihiro Miyazaki
Source :
Journal of Oral and Maxillofacial Surgery, Medicine, and Pathology. 27:764-769
Publication Year :
2015
Publisher :
Elsevier BV, 2015.

Abstract

Background Facial asymmetry, which is often due to asymmetry of the mandible, is a naturally occurring phenomenon in patients with hemifacial microsomia (HFM). Only a few attempts have been made to develop specific quantitative diagnostic criteria for the mandibular asymmetry of HFM. This pilot study was designed to determine the soft-tissue and skeletal characteristics of patients perceived to have HFM and the factors affecting objective assessment of mandibular asymmetry. Methods Frontal facial photographs and frontal cephalograms of twelve patients who had HFM with mandibular asymmetry were analyzed. Landmarks and reference lines were determined on the basis of frontal photographs and cephalographic analysis. Linear measurements of the right and left sides were performed to assess the degree of asymmetry of the mandible. The differences between the affected side and the unaffected side were calculated and analyzed statistically. Results Significant differences were found for linear measurements of the gonion distance (GoD), full marginal distance (FMD), external marginal distance (EMD), and gonion-menton distance (Go-MeD) in the hard tissue and sFMD, sEMD, sGo-MeD in the soft tissue but not for the gonion distance in soft tissue (sGoD). The differences in sEMD and EMD were significantly correlated, and represented a valid factor affecting the mandibular asymmetry in soft and hard tissues. Conclusions The results of this study suggest that appropriate measurements affecting the outline of the mandible such as sEMD and EMD taken from frontal facial photographs and frontal cephalograms provide a useful, objective means of assessing mandibular asymmetry for patients with HFM.

Details

ISSN :
22125558
Volume :
27
Database :
OpenAIRE
Journal :
Journal of Oral and Maxillofacial Surgery, Medicine, and Pathology
Accession number :
edsair.doi...........0b86c9b2ae59631d4921d4cf6667704b
Full Text :
https://doi.org/10.1016/j.ajoms.2015.03.008