Korean J Oral Maxillofac Radiol.  2006 Jun;36(2):73-79.

MRI findings of the antero-superior attachment of the disc in TMJ internal derangement

• Cho BH
• Jung YH

Abstract

PURPOSE: To describe the MRI findings of the antero-superior attachment of the disc in patients with internal derangement.
MATERIALS AND METHODS
One hundred fifty-six MR images from 40 normal subjects and 55 abnormal subjects were classified into three study groups of normal, anterior disc displacement with reduction and anterior disc displacement without reduction. On both closed- and open-mouth proton density sagittal images, the depiction of the antero-superior attachment of the disc and its demarcation from the disc were evaluated in three cuts of lateral, central and medial one thirds of the condyle.
RESULTS
The depiction of antero-superior attachment was more frequent by the order of normal, anterior disc displacement with reduction and anterior disc displacement without reduction groups, and the significant differences were found on lateral cut of the closed images and lateral and central cuts of the open images. In study for the demarcation between the antero-superior attachment and the disc the lateral cut of the closed images and all three cuts of the open images showed significant differences.
CONCLUSION
Open images are useful to show the difference in depiction of the antero-superior attachment of the disc among the TMJ groups.

Keyword

TMJ Disorders; Magnetic Resonance Imaging; Temporomandibular Disc

MeSH Terms

Humans
Magnetic Resonance Imaging*
Protons
Temporomandibular Joint Disorders
Temporomandibular Joint*
Protons