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目的：了解不同影像检查和不同解剖层次上颞下颌关节骨性结构位置关系情况。方法：对３０名健康成年志愿者的６０侧颞下颌关节在牙尖交错位拍摄薛氏位Ｘ线片并行轴向位ＣＴ扫描，用计算机图像分析仪分别对薛氏位Ｘ线片和ＣＴ矢状位３个层面上颞下颌关节间隙进行线性测量和面积测量。结果：不同图像上应用不同测量方法所得左右两侧颞下颌关节相应的关节间隙基本对称。线性测量显示，薛矢位Ｘ线片上在０°和１８０°方向上髁状突基本处于中位，而在其它方向上髁状突则多处于关节窝的后位；ＣＴ矢状面外１／３层面上髁状突基本处于中位；中１／３层面０°和１８０°方向上髁状突多处于后位，而在其它方向上髁状突则分布于前位或中位；内１／３层面上０°和１８０°方向上髁状突位置多居中。面积测量结果显示薛氏位Ｘ线片上髁状突略处后位，而ＣＴ矢状面外１／３层面上髁状突位置稍偏前，中和内１／３层面上髁状突则多处于中位。结论：在不同影像检查方式、不同关节层面、不同定点测量方法和不同取值标准条件下，髁状突和关节窝的位置关系表达并不一致，在颞下颌关节疾病的临床诊断和基础研究中应予以注意。
OBJECTIVE: To understand the relationship between the anatomical structures of temporomandibular joint and different anatomical structures. Methods: Thirty (60) temporomandibular joints of 30 healthy adult volunteers were scanned with X-ray and X-ray computed tomography (X-ray) in axial cusp position. The computerized image analyzer Three levels of status of the temporomandibular joint space for linear and area measurements. Results: The corresponding joint space between the left and right temporomandibular joints was basically symmetrical with different measurement methods. The linear measurements showed that the condyles were almost always located in the 0 ° and 180 ° directions on the X-ray films while the condyles were mostly located in the posterior position of the joints in other directions. The CT sagittal 1 / The condyle was located in the middle in the third level. The condyles in the middle and the third level in the direction of 0 ° and 180 ° were mostly in the posterior position, while in other directions, the condyle was in the anterior or median position. / 3 level on the 0 ° and 180 ° direction of the condyle position more concentrated. Area measurement showed X-ray X-ray posterior condylar slightly behind, and 1/3 of the CT sagittal plane condyle slightly before the position, the middle and the inner 1/3 condyle is more In the middle CONCLUSIONS: The relationship between the condylar process and the joint socket is not consistent under different imaging modalities, different joint levels, different fixed-point measurement methods and different standard values. In the clinical diagnosis and basic researches of temporomandibular joint disease Be careful.