无症状颞下颌关节盘前移位个体的动态磁共振及髁突运动轨迹特点

发布时间：2018-04-15 11:17

本文选题：颞下颌关节 + 动态磁共振　；参考：《解剖学报》2017年06期

【摘要】：目的颞下颌关节盘早期的前移位临床上可无弹响症状,了解无症状颞下颌关节盘的早期移位个体的髁突运动中心轨迹特点,将有助于早期发现隐匿性颞下颌关节结构内紊乱疾病。方法动态磁共振(Cine-MRI)和ARCUSdigma系统检查30例无症状个体开闭口过程中髁状突-关节盘运动特点和下颌运动范围。结果 CineMRI显示30例无症状人群中,20例健康颞下颌关节、10例单侧可复性关节盘前移位,闭口位关节盘本体部仍呈双凹形、盘后区均有轻度增厚和前移位,盘-突关系在小开口(2 cm)期恢复正常;无症状可复性关节盘的运动中心轨迹出现弹跳切迹和偏摆,光滑性、重复性及双侧运动中心轨迹的对称性不及健康人,但是切点运动轨迹平滑,与健康人的切点运动轨迹基本一致;运动轴在髁突轨迹弹跳时出现偏斜,然后保持平行,呈现开闭口初、末时密度比开闭口中时大;髁突运动中心运动距离(13.6±3.7)mm,下颌切点运动距离(40.5±3.4)mm。结论髁突运动轨迹能间接反映髁突-关节盘复合体在开闭口运动中的位置变化,为下一步临床使用下颌运动轨迹仪作为早期关节盘移位的诊断提供一定的理论参考。
[Abstract]:Objective to investigate the characteristics of condylar movement center in the patients with early temporomandibular joint disc displacement.It will be helpful for the early detection of occult temporomandibular joint structural disorders.Methods dynamic magnetic resonance imaging (Mr Cine-MRI) and ARCUSdigma system were used to examine the characteristics of condyle-articular disc motion and mandibular movement in 30 asymptomatic individuals during opening and closing.Results CineMRI showed that 20 cases of healthy temporomandibular joint (TMJ) had anterior disc displacement in 30 asymptomatic subjects, 10 cases of unilateral reducible articular anterior disc displacement, closed position of articular disc body was still double concave, and the posterior disc area was slightly thickened and anterior displacement.The motion center locus of asymptomatic reducible articular disc showed bouncing cuts and deflection, smoothness, repeatability and symmetry of bilateral motion center locus were not as good as those of healthy people.However, the tangent motion trajectory is smooth and consistent with that of healthy people, and the axis of motion deviates when the condylar trajectory bounces, and then keeps parallel, showing the initial opening and closing mouth, and the density at the end is larger than that at the opening and closing mouth.The movement distance of condylar motor center was 13.6 卤3.7mm, and the distance of mandibular cutting point was 40.5 卤3.4 mm.Conclusion the condylar track can indirectly reflect the position change of condyle-articular disc complex in the open and closed mouth movement, which provides a theoretical reference for the diagnosis of the early displacement of the articular disc by using the mandibular motion locus as the next step in clinical practice.
【作者单位】：河南大学基础医学院病理生理学教研室;中山大学光华口腔医学院附属口腔医院口腔颌面外科;上海交通大学医学院附属第九人民医院口腔修复科;河南大学基础医学院抗体药物开发技术国家地方联合工程实验室;
【基金】：国家自然科学基金(81100759) 开封市科技发展计划(1503112)
【分类号】：R782.6

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