关键词: 锥形束CT, 颞下颌关节, 关节间隙, 髁突, 关节窝, 关节结节

Abstract:

The temporomandibular joint(TMJ) is a complex articular system that is located deep between the mandible and the temporal bone. Cone-beam computed tomography(CBCT) provides abundant information on TMJ morphology. On three-dimensional images and two-dimensional slice images, changes in head position changes the position of anatomical landmarks on the same plane, but it can still be generally identified by astute clinicians. On coronal, sagittal, and transverse sections, CBCT displays the structure of TMJ to acquire joint spaces in all directions. The horizontal angle, height, radius, volume, and surface area of the condyle can also be measured to establish TMJ morphology, as well as articular eminence morphology(height, inclination, and thickness of fossa). Moreover, minimum distortion of osseous tissue is useful for analyzing bone change. Therefore, CBCT improves the diagnostic ability of temporomandibular disorders and effectively guide clinical treatment.

Key words: cone beam computed tomography, temporomandibular joint, joint space, condyle, mandibular fossa, articular eminence