El-Essawy Manar T, Al-Nakshabandi Nizar A A, Al-Boukai Ahmad A
Department of Radiology and Medical Imaging, King Khalid University Hospital, PO Box 7805 No. 40, Riyadh 11472, Kingdom of Saudi Arabia.
Saudi Med J. 2008 Oct;29(10):1448-52.
To highlight the importance of MRI in evaluation of the tempromandibular joint (TMJ).
The MRI examination was performed at King Khalid University Hospital, Riyadh, Saudi Arabia with the approval from the local ethics committee, on 34 patients (68 joints) between January 2006 and November 2007, in which 10 were considered asymptomatic subjects (control). The remaining had symptoms and signs of TMJ pain or dysfunction, including limitation of movement and clicking. All our subjects were examined in both closed and open mouth position. Images were obtained by 1.5-T MRI system, in oblique sagittal plane utilizing 3 pulse sequences including T1 and T2 spin-echo, and spoiled gradient recall sequences. The evaluation of the meniscal disc configuration and position was carried out by 2 radiologists.
Sixteen out of 20 joints of asymptomatic subjects were normal. In the other 2 asymptomatic subjects, the MRI showed anterior disc displacement with reduction in 3 joints, and degenerative changes in 2 joints. Out of the 48 symptomatic joints, 26 (45%) joints were considered normal, while the other 22 joints showed anterior dislocation without reduction. Degenerative joint disease was also seen in 18 joints.
The MRI with the use of surface coils markedly improves the delineation of internal derangement of the TMJ, therefore, it enhanced the capability of detecting certain abnormalities, which proved to have a statistical significance in symptomatic patients.
强调磁共振成像（MRI）在颞下颌关节（TMJ）评估中的重要性。
在沙特阿拉伯利雅得的哈立德国王大学医院进行MRI检查，经当地伦理委员会批准，于2006年1月至2007年11月对34例患者（68个关节）进行检查，其中10例被视为无症状受试者（对照组）。其余患者有TMJ疼痛或功能障碍的症状和体征，包括运动受限和弹响。所有受试者均在闭口和开口位进行检查。图像由1.5-T MRI系统获取，在斜矢状面使用包括T1和T2自旋回波以及扰相梯度回波序列在内的3种脉冲序列。半月板盘的形态和位置评估由2名放射科医生进行。
无症状受试者的20个关节中有16个正常。在另外2名无症状受试者中，MRI显示3个关节有可复性盘前移位，2个关节有退行性改变。在48个有症状的关节中，26个（45%）关节被认为正常，而另外22个关节显示不可复性前脱位。18个关节还可见退行性关节病。
使用表面线圈的MRI显著改善了TMJ内部紊乱的显示，因此，它增强了检测某些异常的能力，这在有症状的患者中具有统计学意义。
