锥束ct
鼻离子
医学
面部对称
正颌外科
矢状面
口腔正畸科
颅面
冠状面
对称(几何)
可靠性(半导体)
计算机断层摄影术
核医学
双侧对称
放射科
几何学
数学
物理
功率(物理)
量子力学
机械工程
精神科
工程类
作者
Shaoyang Yu,Yao Zheng,Dong Liu,Wenli Huang,Hua Wu,Qiang Zhang,Yan Xiao,Wei Wu,Tao Lv,Xiao Yuan
摘要
Abstract Symmetry is an essential component of esthetic assessment. Accurate assessment of facial symmetry is critical to the treatment plan of orthognathic surgery and orthodontic treatment. However, there is no internationally accepted midsagittal plane (MSP) for orthodontists and orthognathic surgeons. The purpose of this study was to explore a clinically friendly MSP, which is more accurate and reliable than what is commonly used in symmetry assessment. Forty patients with symmetric craniofacial structures were analyzed on cone‐beam computed tomography (CBCT) scans. The CBCT data were exported to the Simplant Pro software to build four reference planes that were constructed by nasion (N), basion (Ba), sella (S), odontoid (Dent), or incisive foramen (IF). A total of 31 landmarks were located to determine which reference plane is the most optimal MSP by comparing the asymmetry index (AI). The mean value of AI showed a significant difference ( p < 0.05) among four reference planes. Also, the mean value of AI for all landmarks showed that Plane 2 (consisting of N, Ba, and IF) and Plane 4 (consisting of N, IF, and Dent) were more accurate and stable. In conclusion, the MSP consisting of N, Dent, and IF shows more accuracy and reliability than the other planes. Further, it is more clinically friendly because of its significant advantage in landmarking.
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