Zheng J S, Jiao Z X, Zhang S Y, Yang C, Abdelrehem A, Chen M J, He D M, Dong M J
1 Department of Oral and Maxillofacial Surgery, Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, and Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, Shanghai, China.
Dentomaxillofac Radiol. 2015;44(4):20140201. doi: 10.1259/dmfr.20140201. Epub 2015 Jan 7.
We aimed to investigate the correlation between the disc status in MRI and the different types of traumatic temporomandibular joint (TMJ) ankylosis.
51 consecutive patients (69 joints), diagnosed with traumatic TMJ ankylosis with a residual condyle (Types A2 and A3), were included in this study. All patients had pre-operative MRI, which was reviewed to determine the disc shape, length and position. The results were compared using the Mann-Whitney test.
There were 37 joints of Type A2 ankylosis and 32 joints of Type A3. All joints of Type A2 and 27 joints of Type A3 (84.4%) definitely had a discernible disc, while 5 joints of Type A3 had no discernible discs. Among the discernible discs, the lateral disc of Type A2 and the whole disc of Type A3 had severe deformity, while the medial disc of Type A2 had mild deformity. The mean (standard deviation) disc length was 10.88 (1.19) mm in Type A2, but 7.50 (0.82) mm in Type A3. There was a significant difference between Types A2 and A3 (p < 0.05). As for the disc position, the intermediate position was found in all joints.
There is a correlation between the disc status and the different types of traumatic TMJ ankylosis. Therefore, MRI examination is needed to help treatment planning and predict post-operative TMJ function.
我们旨在研究磁共振成像（MRI）中的椎间盘状态与不同类型创伤性颞下颌关节（TMJ）强直之间的相关性。
本研究纳入了51例连续患者（69个关节），这些患者被诊断为伴有残余髁突的创伤性TMJ强直（A2型和A3型）。所有患者术前均进行了MRI检查，对其进行评估以确定椎间盘的形状、长度和位置。结果采用曼-惠特尼检验进行比较。
A2型强直关节有37个，A3型关节有32个。所有A2型关节和32个A3型关节中的27个（84.4%）肯定有可辨认的椎间盘，而A3型中有5个关节没有可辨认的椎间盘。在可辨认的椎间盘中，A2型的外侧椎间盘和A3型的整个椎间盘有严重畸形，而A2型的内侧椎间盘有轻度畸形。A2型椎间盘的平均（标准差）长度为10.88（1.19）mm，而A3型为7.50（0.82）mm。A2型和A3型之间存在显著差异（p < 0.05）。至于椎间盘位置，所有关节均处于中间位置。
椎间盘状态与不同类型的创伤性TMJ强直之间存在相关性。因此，需要进行MRI检查以辅助治疗计划制定并预测术后TMJ功能。
