The diagnostic value of ultrasonography to determine the temporomandibular joint disk position

Assessment of TMJ Disorders Using Ultrasonography as a Diagnostic Tool: A Review

“…However, in the open-mouth position, the disc returns to the normal position in ADD with reduction, whereas the disc remains anteriorly displaced in ADD without reduction [5]. [28]. Diagnostic accuracy was more in the open mouth rather than closed mouth position, but in both the positions, the results obtained were acceptable.…”

“…Increase in resolution increased the sensitivity of US. Emshoff et al, used a transducer of 7.5 MHz, with which the sensitivity was found to be 41-50% and specificity was 70% [28], while in other studies where the transducer used was of 10MHz or more, sensitivity was the limited accessibility of the deep structures, especially the disc, due to the absorption of sound waves by the lateral portion of the head of the condyle and the zygomatic process of the temporal bone [26].…”

“…They reported a low sensitivity (31% in static US and 41% in dynamic US), but a high specificity, especially in dynamic US (95%) [28].…”

Methods of Imaging in the Diagnosis of Temporomandibular Joint Disorders

“…The bone surface rebounds as much as 2/3 of the waves, only 1/3 propagating down to deeper structures. For this reason the transmitter must be placed on a specifi c place, with the aim to transmit waves through the soft tissues, situated between the condyle and the eminence 3,4,5,17 .…”

Ultrasound evaluation of intra-osseous cavity: A preliminary study in pig mandibles

“…solid or cystic), thus making ultrasound a remarkably versatile diagnostic imaging tool for diagnosis. 1 Ultrasound has been successfully used in dentistry and by several researchers who investigate its use for evaluation of temporomandibular joint, periodontal and periapical lesions, and mandibular fracture, [2][3][4][5][6][7] as well as its benefits compared to other imaging modalities. 7,8 Ultrasound has been shown to be an interesting alternative new tool over the last few years for diagnosis of intra-osseous lesions in jaws, overcoming the limitations of conventional radiography and computerized tomography (CT) due to its availability of real-time multiplanar images, absence of ionizing radiation and accurate analysis.…”