矢状和垂直骨面型与髁突位置的关系研究

The Relationship between Anteroposterior and Vertical Skeletal Patterns and Condylar Position

目的了解不同矢状和垂直骨面型成年患者的髁突位置特征,为临床颞下颌关节诊断提供指导。方法:回顾性分析了106例成年患者的CBCT记录。根据ANB角,所有患者被分为骨性Ⅰ类(0°≤ANB<4°)、Ⅱ类(ANB≥4°)和Ⅲ类组(ANB<0°)。根据下颌平面角,被进一步分为低角(MP-FH<23°)、均角(23°≤MP-FH≤30°)和高角组(MP-FH>30°)。Dolphin Imaging软件被用来分析髁突位置。结果左右侧髁突位置在统计学上没有差异(P>0.05)。相比较骨性Ⅰ类和Ⅲ类,骨性Ⅱ类患者髁突位置更靠前(P<0.001)。高角患者髁突位置比均角和低角更靠前(P<0.001)。结论不同骨面型患者的髁突位置不同,骨性Ⅱ类高角患者有更为靠前的髁突位置。

Objective To understand the condylar position characteristics of adult patients with different sagittal and vertical skeletal patterns, and to provide guidance for clinical diagnosis of TMJ.Methods The CBCT data of 106 adult patients were retrospectively studied. According to the ANB degree, the anteroposterior skeletal patterns of all subjects were classified into Classes Ⅰ(0°≤ANB<4°), Ⅱ(ANB≥4°), and Ⅲ(ANB<0°). Three groups were further divided into hypodivergent( MP-FH<23°),normodivergent(23°≤MP-FH≤30°), and hyperdivergent(MP-FH>30°) groups based on the mandibular plane angle. Mandibular condylar positions were analyzed from CBCT images using Dolphin Imaging software. Results There was no statistical difference in the left and right condyle positions(P>0.05). The condyle position was more anterior in patients with skeletal Class Ⅱ than in patients with skeletal class Ⅰ and Ⅲ(P<0.001). The position of condyle in patients with high angle was more anterior than that of average angle and low angle(P<0.001). Conclusion The condyle position is different in patients with different skeletal patterns, and the condyle position is more anterior in patients with high angle and skeletal Class Ⅱ.