Lee Sang-Hwa, Yoon Hyun-Joong
Department of Oral and Maxillofacial Surgery, St. Mary's Hospital, the Catholic University of Korea, Seoul, Republic of Korea.
Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2009 Jan;107(1):113-5. doi: 10.1016/j.tripleo.2008.02.027. Epub 2008 Jul 25.
The purpose of this study was to evaluate the relationship between magnetic resonance imaging (MRI) findings and the relative signal intensity (RSI) of retrodiscal tissue in patients with temporomandibular joint disorders (TMDs) and to determine the usefulness of RSI as a diagnostic marker.
One hundred and thirty-two temporomandibular joints in 66 TMD patients were analyzed. The signal intensities of regions of interest (ROIs) in retrodiscal tissues were measured using T2-weighted MRI. The RSIs of retrodiscal tissues were referenced to the signal intensities of the ROIs of brain gray matter. The relationships between the RSI of retrodiscal tissue and condylar degenerative change (Wilcoxon rank sum test), joint effusion (Wilcoxon rank sum test), disc position (Kruskal-Wallis test), pain (Wilcoxon rank sum test), and limited mouth opening (Wilcoxon rank sum test) were determined.
A strong association was seen between retrodiscal-tissue RSI and disc displacement, joint effusion, condylar degenerative change, and joint pain. Limited mouth opening did not significantly correlate with retrodiscal-tissue RSI.
The retrodiscal-tissue RSI for T2-weighted MRI is a valuable noninvasive tool for monitoring the progression of TMD. Additional clinical studies are warranted.
本研究旨在评估颞下颌关节紊乱病（TMD）患者的磁共振成像（MRI）表现与盘后组织相对信号强度（RSI）之间的关系，并确定RSI作为诊断标志物的实用性。
分析了66例TMD患者的132个颞下颌关节。使用T2加权MRI测量盘后组织中感兴趣区域（ROI）的信号强度。盘后组织的RSI以脑灰质ROI的信号强度为参照。确定了盘后组织RSI与髁突退行性改变（Wilcoxon秩和检验）、关节积液（Wilcoxon秩和检验）、盘位置（Kruskal-Wallis检验）、疼痛（Wilcoxon秩和检验）和张口受限（Wilcoxon秩和检验）之间的关系。
盘后组织RSI与盘移位、关节积液、髁突退行性改变和关节疼痛之间存在密切关联。张口受限与盘后组织RSI无显著相关性。
T2加权MRI的盘后组织RSI是监测TMD进展的有价值的非侵入性工具。有必要进行更多的临床研究。
