Sano T, Westesson P L
Department of Oral Radiology, Showa University, School of Dentistry, Japan.
Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 1995 Apr;79(4):511-6. doi: 10.1016/s1079-2104(05)80138-6.
The cause of pain associated with TMJ disk displacement and internal derangement is unclear. In clinical work with MR imaging we have noted increased T2 signal from the retrodiskal tissue in some patients with TMJ pain and dysfunction. The purpose of this study was to analyze a possible association between pain and the T2 signal intensity from the retrodiskal tissue on MR images. The study was based on 48 joints in 33 patients referred for MR imaging of the TMJ. The T2 signal from the retrodiskal tissue was measured on the MR scanner and was correlated to the degree of pain. The results showed a statistically significant (p < 0.05) association between pain and increased T2 weighted signal. The T2 signal intensity ranged between 251 and 478 and was highest in the painful joints and lowest in the joints without pain. We conclude that the average T2 signal from the retrodiskal tissue is higher in painful joints than in nonpainful joints. This might reflect an increased vascularity of the joint tissue.
与颞下颌关节盘移位和内部紊乱相关的疼痛原因尚不清楚。在利用磁共振成像的临床工作中，我们注意到一些患有颞下颌关节疼痛和功能障碍的患者，其盘后组织的T2信号增强。本研究的目的是分析疼痛与磁共振图像上盘后组织的T2信号强度之间可能存在的关联。该研究基于33例因颞下颌关节磁共振成像而转诊的患者的48个关节。在磁共振扫描仪上测量盘后组织的T2信号，并将其与疼痛程度相关联。结果显示，疼痛与T2加权信号增强之间存在统计学上的显著关联（p < 0.05）。T2信号强度在251至478之间，在疼痛关节中最高，在无疼痛关节中最低。我们得出结论，疼痛关节中盘后组织的平均T2信号高于无疼痛关节。这可能反映了关节组织血管增多。
