Section of Oral and Maxillofacial Radiology, School of Dentistry, The University of California, Los Angeles, USA.
Aust Dent J. 2012 Mar;57 Suppl 1:109-18. doi: 10.1111/j.1834-7819.2011.01663.x.
Radiographic examination is essential for the diagnosis and management of temporomandibular joint (TMJ) disorders. The goals of TMJ radiography are to evaluate cortical and trabecular architecture of the bony structures and confirm their integrity, to assess the extent and monitor progression of osseous changes, and to evaluate the response to treatment. Accurate evaluation of the TMJ by conventional radiography is limited by structure superimposition. Cone beam computed tomography (CBCT) provides high-resolution multiplanar images and delivers substantially lower radiation dose, compared with multislice CT. CBCT allows examination of TMJ anatomy without superimposition and distortion to facilitate analysis of bone morphology, joint space and dynamic function in all three dimensions. This article will describe the role of CBCT imaging for the assessment of the TMJ osseous structures and present typical appearances of common pathological conditions of the TMJ.
放射学检查对于颞下颌关节（TMJ）疾病的诊断和治疗至关重要。TMJ 放射学的目的是评估骨结构的皮质和小梁结构，并确认其完整性，评估骨质变化的程度和监测其进展，并评估治疗反应。传统放射学对 TMJ 的准确评估受到结构重叠的限制。与多层 CT 相比，锥形束 CT（CBCT）提供高分辨率的多平面图像，并大大降低了辐射剂量。CBCT 可以在不重叠和失真的情况下检查 TMJ 解剖结构，从而便于在所有三个维度上分析骨形态、关节间隙和动态功能。本文将描述 CBCT 成像在评估 TMJ 骨结构中的作用，并介绍 TMJ 常见病理状况的典型表现。
