Three-dimensional computed tomography evaluation of craniofacial characteristics according to lateral deviation of chin
최효원, Kim Bo-La, 김재영, 허종기, 박광호,
소속 상세정보
최효원 ( Choi Hyo-Won ) - Yonsei University College of Dentistry Gangnam Severance Hospital Department of Oral and Maxillofacial Surgery
( Kim Bo-La ) - Yonsei University College of Dentistry Gangnam Severance Hospital Department of Oral and Maxillofacial Surgery
김재영 ( Kim Jae-Young ) - Yonsei University College of Dentistry Gangnam Severance Hospital Department of Oral and Maxillofacial Surgery
허종기 ( Huh Jong-Ki ) - Yonsei University College of Dentistry Gangnam Severance Hospital Department of Oral and Maxillofacial Surgery
박광호 ( Park Kwang-Ho ) - Yonsei University College of Dentistry Gangnam Severance Hospital Department of Oral and Maxillofacial Surgery
Abstract
Background: The relationship between the lateral deviation of chin and the upper and middle facial third asymmetry is still controversial. The purpose of this study is to evaluate the correlation of upper and middle facial third asymmetry with lateral deviation of chin using 3-dimensional computed tomography. The study was conducted on patients who underwent orthognathic surgery from January 2016 to August 2017. A total of 40 patients were included in this retrospective study. A spiral scanner was used to obtain the 3-dimensional computed tomography scans. The landmarks were assigned on the reconstructed 3-dimensional images, and their locations were verified on the axial, midsagittal, and coronal slices. The Pearson correlation analysis was performed to evaluate the correlation between chin deviation and difference between the measurements of distances in paired craniofacial structures. Statistical analysis was performed at a significance level of 5%.
Results: In mandible, the degree of chin deviation was correlated with the mandibular length and mandibular body length. Mandibular length and mandibular body length are shorter on the deviated-chin side compared to that on the non-deviated side (mandibular length, r = ?0.897, p value < 0.001; mandibular body length, r = ?0.318, p value = 0.045). In the upper and middle facial thirds, the degree of chin deviation was correlated with the vertical asymmetry of the glenoid fossa and zygonion. Glenoid fossa and zygonion are superior on the deviated-chin side than on the non-deviated side (glenoid fossa, r = 0.317, p value = 0.046; zygonion, r = 0.357, p value = 0.024).
Conclusion: Lateral deviation of chin is correlated with upper and middle facial third asymmetry as well as lower facial third asymmetry. As a result, treatment planning in patients with chin deviation should involve a careful evaluation of the asymmetry of the upper and middle facial thirds to ensure complete patient satisfaction.
키워드
Lateral deviation of chin; Upper and middle facial third asymmetry; Asymmetry of glenoid cavity
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