Abstract

Ultrasonography is the newest imaging modality used for the diagnosis and interventional procedures of oral and maxillofacial region in dentistry now. Although it is not the first and foremost imaging modality in the diag nosis of temporomandibular disorders, it can be the complementary and alternative one for arthrography, CBCT, CT, and MRI. Ultrasonography of temporomandibular joint (TMJ) does not show the anatomical structures easy to understand like CT or MRI, but it gives some useful diagnostic information on internal derangement, capsuli tis, and degenerative joint disease of TMJ. Ultrasound image-guided injection to TMJ can improve the accuracy and efficacy, and can minimize the potential damage to adjacent tissues including major vessles and nerves.