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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

基本信息

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

项目摘要

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.

本研究的目的是通过在CT图像扫描的基础上重建颞下颌关节(TMJ)的骨性成分来测量关节的三维空间，从而从形态上评估稳定的髁状突位置。CT扫描层厚2 mm，层间距1 mm，分别取1例受试者左右两侧的TMJ。为了将数字重建的TMJ图像与上牙列联系起来，他戴了一个面弓装置作为参考，上面附了三个记号笔。测量序列CT扫描的三维数据点，进行TMJ数字化重建。使用图形软件重建由大约12000个点和大约24000个点组成的TMJ图像。距离分布图是根据计算出的关节间距为0~5 mm，每隔1 mm的距离分布图，用伪彩对重建的髁状突表面进行绘制，从而可以有效地直观地显示出髁状突的形态特征及其与关节窝的关系。关节间隙外侧部分在TMJ内最窄，关节窝形态与髁突相似。我认为这些发现一定是稳定的髁状突位置的形态特征。