Williamson P C, Major P W, Nebbe B, Glover K E, Prasad N G
Division of Orthodontics, Faculty of Medicine and Oral Health Sciences, University of Alberta, Canada.
Cranio. 1999 Apr;17(2):101-8. doi: 10.1080/08869634.1999.11746084.
The purpose of this research was to examine the relationship between horizontal condylar angulation and position and joint status in an adolescent population. Submentovertex (SMV) radiographs and MRI (magnetic resonance images) of 95 subjects (56 females and 39 males) between the ages of 10-17 years (mean age 13.3 years) were used for this study. Horizontal condylar angulation as well as A-P and transverse condyle position were determined in relation to a cranial base reference (a line formed between the two foramina spinosa) from SMV images. Joint status variables consisted of disk length and disk displacement measurements taken from medial, central and lateral sagittal MRI slices of each joint. Additional joint status variables were derived through a principal component analysis which was used to calculate a single disk length, disk displacement, and internal derangement variable for each joint. The results were: 1. No significant correlations (p = .05) were found between any of the joint status variables and horizontal condylar angulation; 2. Statistically significant correlations (r = .14 to .22, p = .05) were observed between certain joint status variables (anterior disk displacement in medial and central joint slices, disk displacement variable, and TMJ internal derangement variable) and transverse condyle position; and, 3. Statistically significant correlations (r = -.22 to .25; p = .05) were observed between condylar angulation and both A-P and transverse condyle position.
本研究的目的是探讨青少年人群中髁突水平角度与位置及关节状态之间的关系。本研究使用了95名年龄在10至17岁（平均年龄13.3岁）的受试者（56名女性和39名男性）的颏下顶点（SMV）X线片和MRI（磁共振成像）。根据SMV图像，相对于颅底参考（两个棘孔之间形成的线）确定髁突水平角度以及前后和横向髁突位置。关节状态变量包括从每个关节的内侧、中央和外侧矢状面MRI切片测量的盘长度和盘移位。通过主成分分析得出额外的关节状态变量，该分析用于计算每个关节的单个盘长度、盘移位和内部紊乱变量。结果如下：1. 在任何关节状态变量与髁突水平角度之间未发现显著相关性（p = 0.05）；2. 在某些关节状态变量（内侧和中央关节切片中的前盘移位、盘移位变量和颞下颌关节内部紊乱变量）与横向髁突位置之间观察到统计学上的显著相关性（r = 0.14至0.22，p = 0.05）；3. 在髁突角度与前后髁突位置和横向髁突位置之间均观察到统计学上的显著相关性（r = -0.22至0.25；p = 0.05）。
