A Study on the Stable Condylar Position by Measuring the Temporomandibular Joint Space

颞下颌关节间隙测量稳定髁突位置的研究

• 批准号: 11671966
• 负责人: MORI Takashi
• 金额: $ 1.41万
• 依托单位: Aichi-Gakuin University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11671966/
• 关键词: stable condylar position; reconstruction; temporomandibular joint space; CT image; 顎関節3次元構築

The purpose of this study was to evaluate the stable condylar position morphologically by measuring the three-dimensional joint space using a reconstruction of the temporomandibular joints' (TMJs) osseous components based on a computed tomography (CT) image scan. Axial CT scans, with a 2 mm-thickness and a slice space of 1 mm, were taken from the right and left TMJs of one subject. In order to relate the digitally reconstructed TMJ images to the upper dentition, he wore a face bow unit as a reference that had three markers attached onto it. The three-dimensional data points from the serial CT scans were measured to reconstruct the TMJs digitally. The TMJ images composed of approximately 12000 points and the fossa of approximately 24000 points were reconstructed using graphic software. The distance distribution map was composed of the reconstructed condylar surface shaded with pseudo-colors according to the calculated joint space of 0-5mm at 1mm intervals between each fossa and the condyle measurement point.The distance distribution map made it possible to visualize effectively the morphologic characteristics of the condyle and the relationship between the condyle and the fossa. The lateral part of the joint space was the narrowest in the TMJ and the fossa was morphologically similar to the condyle. I supposed that these findings must have been the morphological characteristic of the stable condylar position.

这项研究的目的是通过基于计算机断层扫描（CT）图像扫描的颞下颌关节（TMJS）骨组件的重建来测量三维关节空间来评估稳定的con孔位置。轴向CT扫描，具有2 mm厚度和1毫米的切片空间，从一个受试者的左右TMJ中取走。为了将经过数字重建的TMJ图像与上牙式相关联，他戴了一个脸弓单元，作为参考，上面有三个标记。测量来自串行CT扫描的三维数据点以数字化重建TMJ。使用图形软件重建了约12000点的TMJ图像，大约24000点的窝。距离分布图由重建的do孔表面由伪色阴影组成，根据每个窝和condyle测量点之间的1mm间隔的计算出的关节空间，距离分布图可有效地可视化con和Condyle和Condyle和Fossa之间的关系。关节空间的侧部分是TMJ中最狭窄的，窝在形态上与con虫相似。我以为这些发现一定是稳定dyolt骨位置的形态特征。