Bandai Natsuko, Sanada Shigeru, Ueki Kouichiro, Funabasama Shintaro, Tsuduki Shinji, Matsui Takeshi
Department of Radiological Technology, Graduate School of Medical Science, Kanazawa University.
Nihon Hoshasen Gijutsu Gakkai Zasshi. 2003 Aug;59(8):951-7. doi: 10.6009/jjrt.kj00000921840.
The purpose of this study was to develop a screening technique for temporomandibular disorders (TMD) and assist dentists in objectively observing and evaluating pre/post-treatment status. Dynamic images of the temporomandibular joint (TMJ) from one healthy volunteer were obtained by digital fluoroscopy in the lateral view on both right and left sides. Outlines of the glenoid fossa and the condyle were extracted, respectively, by using sobel operator (7x7) thresholding and labeling. Morphological parameters in time-sequence, such as fossa ratio, area, and distance of the joint space, were then analyzed. There were no differences between manual and computer analysis in extracting the outline of the glenoid fossa and the condyle. Deformity of the outline of the glenoid fossa and the condyle was not identified in this subject. The fossa ratio was 0.30+/-0.01 on the right and 0.29+/-0.02 on the left. The area and distance of the joint space in the post-glenoid fossa were slightly larger than those in the articular eminence on both sides. These morphological parameters were useful for screening and pre- and post-treatment evaluation of TMD patients.
本研究的目的是开发一种颞下颌关节紊乱病（TMD）的筛查技术，并协助牙医客观地观察和评估治疗前后的状况。通过数字荧光透视在左右两侧的侧视图中获取一名健康志愿者颞下颌关节（TMJ）的动态图像。分别使用索贝尔算子（7x7）阈值化和标记提取关节窝和髁突的轮廓。然后分析时间序列中的形态学参数，如关节窝比率、面积和关节间隙距离。在提取关节窝和髁突的轮廓方面，手动分析和计算机分析之间没有差异。在该受试者中未发现关节窝和髁突轮廓的畸形。右侧的关节窝比率为0.30±0.01，左侧为0.29±0.02。两侧关节窝后部的关节间隙面积和距离略大于关节结节处的面积和距离。这些形态学参数对于TMD患者的筛查以及治疗前后的评估很有用。
