Deviation of landmarks in accordance with methods of establishing reference planes in three-dimensional facial CT evaluation.
10.5624/isd.2014.44.3.207
- Author:
Kaeng Won YOON
1
;
Suk Ja YOON
;
Byung Cheol KANG
;
Young Hee KIM
;
Min Suk KOOK
;
Jae Seo LEE
;
Juan Martin PALOMO
Author Information
1. School of Dentistry, Dental Science Research Institute, Chonnam National University, Gwangju, Korea.
- Publication Type:Original Article
- Keywords:
Tomography, X-Ray Computed;
Facial Asymmetry;
Orthognathic Surgery
- MeSH:
Facial Asymmetry;
Humans;
Orthognathic Surgery;
Tomography, X-Ray Computed
- From:Imaging Science in Dentistry
2014;44(3):207-212
- CountryRepublic of Korea
- Language:English
-
Abstract:
PURPOSE: This study aimed to investigate the deviation of landmarks from horizontal or midsagittal reference planes according to the methods of establishing reference planes. MATERIALS AND METHODS: Computed tomography (CT) scans of 18 patients who received orthodontic and orthognathic surgical treatment were reviewed. Each CT scan was reconstructed by three methods for establishing three orthogonal reference planes (namely, the horizontal, midsagittal, and coronal reference planes). The horizontal (bilateral porions and bilateral orbitales) and midsagittal (crista galli, nasion, prechiasmatic point, opisthion, and anterior nasal spine) landmarks were identified on each CT scan. Vertical deviation of the horizontal landmarks and horizontal deviation of the midsagittal landmarks were measured. RESULTS: The porion and orbitale, which were not involved in establishing the horizontal reference plane, were found to deviate vertically from the horizontal reference plane in the three methods. The midsagittal landmarks, which were not used for the midsagittal reference plane, deviated horizontally from the midsagittal reference plane in the three methods. CONCLUSION: In a three-dimensional facial analysis, the vertical and horizontal deviations of the landmarks from the horizontal and midsagittal reference planes could vary depending on the methods of establishing reference planes.
