J Korean Assoc Oral Maxillofac Surg.  2011 Apr;37(2):109-113. 10.5125/jkaoms.2011.37.2.109.

Cross-sectional study of the mandibular body in patients with facial asymmetry

• Lee JY
• Kim YI
• Hwang DS
• Kim YD
• Shin SH
• Kim UK
• Chung IK

• KMID: 2136999
• DOI: http://doi.org/10.5125/jkaoms.2011.37.2.109

Abstract

INTRODUCTION
To correct the facial asymmetry by mandibular jaw surgery, it is important to know the anatomy of the mandible including the mandibular canal positioning of patients with facial asymmetry. This study was performed to evaluate the differences in the cross-sectional surface in the body of the mandible between the deviated side and opposite side in patients with facial asymmetry.
MATERIALS AND METHODS
The study was conducted on 37 adult patients composed of 2 groups, the asymmetry group (n=20) and non-asymmetry group (n=17). Using the cross-sectional computed tomography (CT) images, the distance from the buccal aspect of the mandibular canal to the outer aspect of the buccal cortex, distance from the buccal aspect of the mandibular canal to the inner aspect of the buccal cortex, distance from the inferior aspect of the mandibular canal to the inferior border of the mandible, thickness of the mandible, and cross-sectional surface area of the mandible were measured in each side of the mandible.
RESULTS
The cross-sectional area of the mandible including the mandibular canal positioning in the deviated side was not statistically different from the opposite side in the asymmetry group. Only the distance from the inferior aspect of the mandibular canal to the inferior border of the mandible in the ramus area of the deviated side was significantly longer than opposite side. On the other hand, the bucco-lingual width of the asymmetry group was thinner than the non-asymmetry group.
CONCLUSION
The cross-sectional area including the mandibular canal of the mandible did not appear to be modified by the facial asymmetry.

Keyword

Facial asymmetry; Cross-sectional anatomy; Mandibular nerve

MeSH Terms

Adult
Anatomy, Cross-Sectional
Facial Asymmetry
Hand
Humans
Mandible
Mandibular Nerve
Orthognathic Surgery

Figure

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  Fig. 1. Converted images by using Ondemand program. A: Axial image, B: Cross-sectional image, C: Panoramic image.

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  Fig. 2. Measuring points and measurements in the cross sectional images. (A: distance from the buccal aspect of the mandibular canal to outer aspect of the buccal cortex, B: distance from the buccal aspect of the mandibular canal to inner aspect of the buccal cortex, C: distance from the inferior aspect of the mandibular canal to inferior border of the mandible, D: thickness of the mandible, E: cross-sectional surface area of the mandible)

Reference

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