Zhang Xiao-Huan, Liu Meng-Qi, Hu Min, Wang Yan-Yi, Chen Zhi-Ye
Department of Radiology,Hainan Hospital of Chinese PLA General Hospital,Sanya,Hainan 572013,China.
Department of Oral and Maxillofacial Surgery,the First Medical Center of Chinese PLA General Hospital,Beijing 100853,China.
Zhongguo Yi Xue Ke Xue Yuan Xue Bao. 2021 Aug;43(4):579-583. doi: 10.3881/j.issn.1000-503X.13076.
Objective To evaluate lateral pterygoid muscle(LPM)contraction in the patients with temporomandibular disorders(TMD)based on 3D-T2 weighted imaging(3D-T2WI).Multiplanar reconstruction(MPR)was employed to measure the length of LPM in the images taken in closed-and open-mouth positions. Methods Seventeen TMD patients [age of(29.82±10.70)years,males/females=8/9] and 13 normal volunteers [control,age of(23.54±3.31)years,males/females=6/7] received 3D-T2WI of the temporomandibular joints in closed-and open-mouth positions from November 2019 to April 2020 in Department of Radiology,Hainan Hospital of Chinese PLA General Hospital.According to the position of the discs,the subjects were classified into the following groups:TMD with disc displacement without reduction(TMD-DDwoR),TMD with disc displacement with reduction(TMD-DDwR),TMD without disc displacement(TMDwoDD),and normal control without disc displacement(NCwoDD).MPR was employed to measure the maximal length of the superior belly of LPM.One-way analysis of variance,receiver operating characteristic curve,and permutation test were employed for the statistical analyses. Results The contraction of LPM was significantly shorter in TMD-DDwoR group [(3.36±1.96)mm] than in TMDwoDD group [(7.90±3.95)mm],NCwoDD group (8.77±3.13)mm,and TMD-DDwR group(7.12±3.69)mm. Conclusion This study confirmed that the contraction of LPM decreased in patients with TMD-DDwoR,which provided imaging evidence for the study of disc displacement mechanism in TMD patients.
目的 基于三维T2加权成像（3D-T2WI）评估颞下颌关节紊乱病（TMD）患者翼外肌（LPM）的收缩情况。采用多平面重建（MPR）测量闭口位和开口位图像中LPM的长度。方法 2019年11月至2020年4月，在解放军总医院海南医院放射科，17例TMD患者[年龄（29.82±10.70）岁，男/女=8/9]和13名正常志愿者[对照组，年龄（23.54±3.31）岁，男/女=6/7]接受了颞下颌关节的闭口位和开口位3D-T2WI检查。根据关节盘位置，将受试者分为以下几组：不可复性盘前移位TMD（TMD-DDwoR）、可复性盘前移位TMD（TMD-DDwR）、无盘移位TMD（TMDwoDD）和无盘移位正常对照组（NCwoDD）。采用MPR测量LPM上半肌腹的最大长度。采用单因素方差分析、受试者工作特征曲线和置换检验进行统计学分析。结果 TMD-DDwoR组LPM的收缩长度[（3.36±1.96）mm]明显短于TMDwoDD组[（7.90±3.95）mm]、NCwoDD组[（8.77±3.13）mm]（F=12.891，P=0.000）和TMD-DDwR组[（7.12±3.69）mm]（F=5.314，P=0.031）。结论 本研究证实TMD-DDwoR患者LPM的收缩功能降低，为TMD患者关节盘移位机制的研究提供了影像学依据。
