Three-Dimensional Analysis of Nasal Morphology in Patients with Facial Asymmetry Undergoing Two-jaw Surgery

• AKIYAMA SAKIKO

  Section of Maxillofacial Orthognathics, Department of Maxillofacial Neck Reconstruction, Division of Maxillofacial Reconstruction and Function, Graduate School, Tokyo Medical and Dental University

• HIGASHIHORI NORIHISA

  Section of Maxillofacial Orthognathics, Department of Maxillofacial Neck Reconstruction, Division of Maxillofacial Reconstruction and Function, Graduate School, Tokyo Medical and Dental University

• HIKITA RINA

  Section of Maxillofacial Orthognathics, Department of Maxillofacial Neck Reconstruction, Division of Maxillofacial Reconstruction and Function, Graduate School, Tokyo Medical and Dental University

• ITO YOSUKE

  Section of Maxillofacial Orthognathics, Department of Maxillofacial Neck Reconstruction, Division of Maxillofacial Reconstruction and Function, Graduate School, Tokyo Medical and Dental University

• KADOTA-WATANABE CHIHO

  Section of Maxillofacial Orthognathics, Department of Maxillofacial Neck Reconstruction, Division of Maxillofacial Reconstruction and Function, Graduate School, Tokyo Medical and Dental University

• TAKAHASHI YUKI

  Section of Maxillofacial Orthognathics, Department of Maxillofacial Neck Reconstruction, Division of Maxillofacial Reconstruction and Function, Graduate School, Tokyo Medical and Dental University

• MATSUMOTO TSUTOMU

  Section of Maxillofacial Orthognathics, Department of Maxillofacial Neck Reconstruction, Division of Maxillofacial Reconstruction and Function, Graduate School, Tokyo Medical and Dental University

• MORIYAMA KEIJI

  Section of Maxillofacial Orthognathics, Department of Maxillofacial Neck Reconstruction, Division of Maxillofacial Reconstruction and Function, Graduate School, Tokyo Medical and Dental University

Bibliographic Information

Other Title

• 上下顎移動術を施行した顔面非対称を伴う顎変形症患者の鼻形態に対する三次元解析

Abstract

Objective: Two-jaw surgery is often performed in patients with facial asymmetry to improve malocclusion and facial esthetics. However, undesired changes of the nasal morphology may collaterally occur due to repositioning of the maxillary bone. The purpose of this study was to investigate the influence of two-jaw surgery on nasal morphology in orthognathic patients with facial asymmetry using 3-dimensional computed tomography (3D-CT) image analysis.<br>Materials and Methods: Twelve patients (7 females and 5 males, mean age at the time of surgery: 24.3±5.9 years) with facial asymmetry who had undergone two-jaw surgery were enrolled. Pre-surgical facial 3D-CT images (T₁) were superimposed on images obtained 4 months post-surgery (T₂) using 3D imaging software. The 3D coordinate system constructed by Frankfurt horizontal (FH) plane was used for the analysis, including the frontal plane, incorporating orbits on both sides, and the sagittal plane, intersecting at the midpoint between the orbits. After superimposing the T₁ and T₂ images, soft-tissue 3D-CT images were reconstructed, and changes in external nasal morphology were analyzed. Furthermore, linear and angular measurements of hard and soft tissues, as well as measurements of the external nasal aperture area were obtained and compared between T₁ and T₂.<br>Results: T₂ images showed anterior placement of nasal area soft tissues resulting in widening of the nasal wing, and a significant reduction in canting of the alar base and the lip. The external nasal aperture area was similar between the shifted and non-shifted sides at T₁. At T₂, the nasal aperture was significantly increased in both the shifted and non-shifted sides, but the aspect of change was the same. Positive correlations were seen between the horizontal/vertical movement of ANS and nasal soft tissues, and between the cant of the occlusal plane and the alar base.<br>Conclusion: The study showed that two-jaw surgery is an effective treatment modality for patients with facial asymmetry. However, since nasal area soft tissues were correlated with movement of ANS, the effect of maxillary movement on nasal soft tissues must be considered when making the treatment plan.

Journal

• The Japanese Journal of Jaw Deformities

  The Japanese Journal of Jaw Deformities 28 (4), 259-268, 2018

  THE JAPANESE SOCIETY FOR JAW DEFORMITIES

Keywords

• facial asymmetry
• three-dimensional analysis
• nasal morphology

Details

• CRID: 1390564238061526912
• NII Article ID: 130007556243
• DOI: 10.5927/jjjd.28.259
• ISSN: 18845045
• ISSN: 09167048
• Web Site: https://www.jstage.jst.go.jp/article/jjjd/28/4/28_259/_pdf
• Web Site: https://search.jamas.or.jp/link/ui/2019176599
• Text Lang: ja
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed