Three-Dimensional Analysis of External Nasal Morphology Changes After Undergoing Two-Jaw Surgery Combined with Le Fort I Osteotomy for Skeletal Class III Patients
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- YAMADA DAISUKE
- Section of Maxillofacial Orthognathics, Department of Maxillofacial Neck Reconstruction, Division of Maxillofacial Reconstruction and Function, Graduate School, Tokyo Medical and Dental University
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- HIGASHIHORI NORIHISA
- Section of Maxillofacial Orthognathics, Department of Maxillofacial Neck Reconstruction, Division of Maxillofacial Reconstruction and Function, Graduate School, Tokyo Medical and Dental University Global Center of Excellence (GCOE) program, International Research Center for Molecular Science in Tooth and Bone Diseases
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- FUKUOKA HIROKI
- Section of Maxillofacial Orthognathics, Department of Maxillofacial Neck Reconstruction, Division of Maxillofacial Reconstruction and Function, Graduate School, Tokyo Medical and Dental University Global Center of Excellence (GCOE) program, International Research Center for Molecular Science in Tooth and Bone Diseases
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- SUZUKI SHOUICHI
- Section of Maxillofacial Orthognathics, Department of Maxillofacial Neck Reconstruction, Division of Maxillofacial Reconstruction and Function, Graduate School, Tokyo Medical and Dental University Global Center of Excellence (GCOE) program, International Research Center for Molecular Science in Tooth and Bone Diseases
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- KAWAMOTO TATSUO
- Section of Maxillofacial Orthognathics, Department of Maxillofacial Neck Reconstruction, Division of Maxillofacial Reconstruction and Function, Graduate School, Tokyo Medical and Dental University Global Center of Excellence (GCOE) program, International Research Center for Molecular Science in Tooth and Bone Diseases
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- MORIYAMA KEIJI
- Section of Maxillofacial Orthognathics, Department of Maxillofacial Neck Reconstruction, Division of Maxillofacial Reconstruction and Function, Graduate School, Tokyo Medical and Dental University Global Center of Excellence (GCOE) program, International Research Center for Molecular Science in Tooth and Bone Diseases
Bibliographic Information
- Other Title
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- Le Fort I型骨切り術を併用し上下顎移動術を行った骨格性下顎前突症例の外鼻形態変化に対する三次元的検討
- Three-dimensional analysis of external nasal morphology changes undergoing two-jaw surgery combined with Le Fort I osteotomy for skeletal class III patients
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Abstract
Facial morphology improvements are obtained following two-jaw surgery in mandibular protrusion patients. Changing external nasal morphology does not always lead to good results in all patients. In this study, using 3-dimentional computed tomography (3D-CT), we examined the changes of external nasal morphology of patients who had undergone two-jaw surgery to correct mandibular protrusion. Seven adult patients (5 male; 2 female) who had been treated by two-jaw surgery associated with upward transposition of the posterior maxilla were enrolled in this study. 3D analysis software superimposed 3D-CTs of the pre-operative and post-operative stages (at least 6 months after surgery) on the hard tissue surfaces. We employed the 3D coordinate system constructed by Frankfort horizontal (FH) plane, the frontal plane incorporating the orbitals on both sides and the sagittal plane intersecting at the midpoint between the orbitals. After superimposition, soft tissue images of 3D-CT were reconstructed and changes in external nasal morphology were three-dimensionally analyzed. 3D geographical analysis, linear and angular measurements were performed for the most inferior points on the nasal alar (LBi, RBi) on bilateral sides, the most anterior point on the nose (Prn), the most anterior point on the columella of the nose (Cm), the most posterior superior point on the nasolabial curvature (Sn) and the most anterior point on the convexity of the upper lip (Vu). Correlation of hard tissue and soft tissue changes were statistically analyzed by Spearman's rank correlation analysis.<br>LBi and RBi moved anterior according to the anterior movement of point A. Increase in distance of both LBi and RBi and angle of LBi-Prn-RBi were observed. We found significant increase in the area of external nasal aperture. Positive correlation was seen between the anterior movement of point A and the distance of LBi and RBi.<br>These results imply that our superimposition of CT images using the 3D coordinate system are useful to compare soft tissue changes before and after surgery. Further investigation for more information about the factors that influence facial morphology changes is necessary since the changes may not be uniform due to the individual variety of soft tissue characterization, and the direction and amount of maxillary movement by Le Fort I osteotomy.
Journal
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- The Japanese Journal of Jaw Deformities
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The Japanese Journal of Jaw Deformities 22 (1), 12-19, 2012
THE JAPANESE SOCIETY FOR JAW DEFORMITIES
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Details 詳細情報について
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- CRID
- 1390282679429454592
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- NII Article ID
- 10031168151
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- NII Book ID
- AN10366185
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- ISSN
- 18845045
- 09167048
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- Text Lang
- en
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- Data Source
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- JaLC
- Crossref
- CiNii Articles
- KAKEN
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- Abstract License Flag
- Disallowed