Gorucu-Coskuner Hande, Ciger Semra
Dr, Department of Orthodontics, Faculty of Dentistry, Hacettepe University, Sıhhıye, 6100, Ankara / Turkey.
J Clin Exp Dent. 2017 Mar 1;9(3):e417-e423. doi: 10.4317/jced.53524. eCollection 2017 Mar.
This study aimed to investigate and compare the positions and dimensions of the temporomandibular joint and its components, respectively, in patients with Class II division 1 and division 2 malocclusions.
Computed tomography images of 14 patients with Class II division 1 and 14 patients with Class II division 2 malocclusion were included with a mean age of 11.4 ± 1.2 years. The following temporomandibular joint measurements were made with OsiriX medical imaging software program. From the sagittal images, the anterior, superior, and posterior joint spaces and the mandibular fossa depths were measured. From the axial images, the greatest anteroposterior and mediolateral diameters of the mandibular condyles, angles between the long axis of the mandibular condyle and midsagittal plane, and vertical distances from the geometric centers of the condyles to midsagittal plane were measured. The independent samples t-test was used for comparing the measurements between the two sides and between the Class II division 1 and 2 groups.
No statistically significant differences were observed between the right and left temporomandibular joints; therefore, the data were pooled. There were statistically significant differences between the Class II division 1 and 2 groups with regard to mandibular fossa depth and anterior joint space measurements.
In Class II patients, the right and left temporomandibular joints were symmetrical. In the Class II division 1 group, the anterior joint space was wider than that in Class II division 2 group, and the mandibular fossa was deeper and wider in the Class II division 1 group. Temporomandibular joint, Class II malocclusion, Cone beam computed tomography.
本研究旨在分别调查和比较安氏II类1分类和2分类错牙合患者颞下颌关节及其组成部分的位置和尺寸。
纳入14例安氏II类1分类患者和14例安氏II类2分类患者的计算机断层扫描图像，平均年龄为11.4±1.2岁。使用OsiriX医学成像软件程序对颞下颌关节进行以下测量。从矢状位图像测量关节前间隙、上间隙和后间隙以及下颌窝深度。从轴位图像测量下颌髁突的最大前后径和内外侧径、下颌髁突长轴与正中矢状面的夹角以及髁突几何中心到正中矢状面的垂直距离。采用独立样本t检验比较两侧以及安氏II类1分类组和2分类组之间的测量值。
左右颞下颌关节之间未观察到统计学上的显著差异；因此，将数据合并。安氏II类1分类组和2分类组在测量下颌窝深度和关节前间隙方面存在统计学上的显著差异。
在安氏II类患者中，左右颞下颌关节是对称的。在安氏II类1分类组中，关节前间隙比安氏II类2分类组宽，且安氏II类1分类组的下颌窝更深更宽。颞下颌关节，安氏II类错牙合，锥形束计算机断层扫描。
