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  • Title: [A three-dimensional imaging study of the effect of anterior disc displacement on the bony structural relationship of the temporomandibular joint].
    Author: Liu X, Li CX, Gong ZC, Ma YY, Tuersun S.
    Journal: Zhonghua Kou Qiang Yi Xue Za Zhi; 2024 Feb 09; 59(2):157-164. PubMed ID: 38280823.
    Abstract:
    Objective: To investigate the correlation between the osseous structure of temporomandibular joint (TMJ) and three different status of anterior disc location, so that it could guide the clinical diagnosis further. Methods: Fifty-two patients [46 females and 6 males, with an age of (27.8±8.3) years] who treated with MRI and cone beam CT, were recruited from the Temporomandibular Joint Specialist Clinic, The First Affiliated Hospital of Xinjiang Medical University, between March 2018 to December 2021. According to the radiographic findings of the level of anterior disc displacement (ADD) in TMJ, patients were divided into three groups: normal articular disc position (NADP, n=28 TMJs), anterior disc displacement with reduction (ADDWR, n=28 TMJs), and anterior disc displacement without reduction (ADDWoR, n=28 TMJs). In the light of the reconstructed three-dimensional model, ten representative morphological parameters including condylar volume (CV), condylar superficial area (CSA), fossa volume (FV), fossa superficial area (FSA), the proportion of the condylar volume in the articular fossa (CV%), the proportion of the condylar superficial area in the articular fossa (CSA%), superior joint space (SJS), anterior joint space (AJS), posterior joint space (PJS), and medial joint space (MJS), were measured respectively under one-way analysis of variance (ANOVA), Kruskal-Wallis Htest and receiver operator characteristic curve(ROC curve) analyses. Results: CV and CSA values varied significantly in the pathological progression from normal location to irreversible anterior displacement in TMJ. For CV value, NADP group [(1 834.90±667.67) mm3]>ADDWR group [(1 747.34±369.42) mm3]>ADDWoR group [(1 256.29±418.27) mm3] [t=4.31, P(NADP-ADDWoR)<0.001; t=3.66, P(ADDWR-ADDWoR)<0.001], for CSA value, NADP group [(859.27±216.01) mm2]>ADDWR group [(838.23±118.82) mm2]>ADDWoR group [(669.14±150.26) mm2] [t=4.27, P(NADP-ADDWoR)<0.001; t=3.80, P(ADDWR-ADDWoR)<0.001]. The difference of SJS value in NADP group [(2.22±0.88) mm], ADDWR group [(1.94±0.64) mm] and ADDWoR group [(1.45±0.57) mm], was statistically significant [t=4.11, P(NADP-ADDWoR)<0.001; t=2.63, P(ADDWR-ADDWoR)=0.010]. The results of MJS in NADP group [(5.03±1.41) mm], ADDWR group [(3.86±1.32) mm], and ADDWoR group [(4.91±1.65) mm] were significantly different [t=3.00, P(NADP-ADDWR)=0.004; t=2.63, P(ADDWR-ADDWoR)=0.009]. As calculated by the ROC curve analysis, CV, CSA and SJS showed that (AUCCV=0.77, AUCCSA=0.76; AUCSJS=0.76) for the NADP and ADDWoR groups, and (AUCCV=0.80; AUCCSA=0.80; AUCSJS=0.72) for the ADDWR and ADDWoR groups. While the diagnostic accuracy of MJS for the comparison in NADP versus ADDWR and ADDWR versus ADDWoR was respectively AUC(NADP-ADDWR)=0.73, and AUC(ADDWR-ADDWoR)=0.69. Conclusions: CV, CSA, SJS, and MJS were significantly associated with the different disc displacement status, and the condyle in TMJ ADD exhibited three-dimensionally altered dimensions. They could be considered as promising biometric markers to diagnose the ADD status. 目的： 本研究通过三维重建图像测量分析3种不同关节盘状态下，颞下颌关节（TMJ）相关骨性结构的改变情况，为临床诊断提供指导。 方法： 对2018年3月至2021年12月就诊于新疆医科大学第一附属医院颞下颌关节专病门诊同时行MRI与锥形束CT检查的52例患者，其中女性46例，男性6例，年龄（27.8±8.3）岁。根据MRI检查结果将纳入研究对象分为关节盘位置正常（NADP）组、可复性关节盘前移位（ADDWR）组及不可复性关节盘前移位（ADDWoR）组，每组各28侧TMJ。对各组锥形束CT资料进行三维重建，根据重建模型分别记录髁突体积（CV）、髁突表面积（CSA）、关节窝体积（FV）、关节窝表面积（FSA）、髁突在关节窝中体积占比（CV%）、髁突在关节窝中表面积占比（CSA%）、关节腔上间隙（SJS）、关节腔前间隙（AJS）、关节腔后间隙（PJS）以及关节腔内侧间隙（MJS）。采用单因素方差分析、Kruskal-Wallis H检验及受试者操作特征曲线（ROC曲线）分析各参数的改变情况。 结果： CV和CSA在关节盘正常至不可复性前移位的病理进展中均发生显著变化（F=10.79，P<0.001；F=10.95，P<0.001）。NADP组和ADDWR组的CV、CSA和SJS［分别为（1 834.90±667.67）和（1 747.34±369.42）mm3，（859.27±216.01）和（838.23±118.82）mm2，（2.22±0.88）和（1.94±0.64）mm］均显著大于ADDWoR组［分别为（1 256.29±418.27）mm3、（669.14±150.26）mm2、（1.45±0.57）mm］（t=4.31，P<0.001；t=3.66，P<0.001；t=4.27，P<0.001；t=3.80，P<0.001；t=4.11，P<0.001；t=2.63，P=0.010）。NADP组MJS［（5.03±1.41）mm］显著高于ADDWR组［（3.86±1.32）mm］（t=3.00，P=0.004），ADDWR组MJS显著高于ADDWoR组［（4.91±1.65）mm］（t=2.63，P=0.009）。ROC曲线分析显示，CV、CSA、SJS对鉴别NADP与ADDWoR的曲线下面积（AUC）值分别为0.77、0.76、0.76，CV、CSA、SJS对鉴别ADDWR与ADDWoR效果的AUC值分别为0.80、0.80、0.72。MJS对鉴别NADP和ADDWR、ADDWR和ADDWoR的AUC值分别为0.73和0.69。 结论： 颞下颌关节盘移位患者的髁突在三维层面上改变明显，CV、CSA、SJS和MJS的变化与不同的关节盘状态显著相关，可作为评价颞下颌关节盘移位准确度较高的测量指标。.
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