Korean J Oral Maxillofac Radiol.  2001 Dec;31(4):221-225.

Observation of bilaminar zone in magnetic resonance images of temporomandibular joint

• Nah KS

Abstract

PURPOSE: To observe the relationship of bilaminar zone of temporomandibular joint retrodiscal tissues to the disc condition.
MATERIALS AND METHODS
The upper and lower stratum of bilaminar zone were identified on magnetic resonance open mouth images of 148 joints from 74 patients with disc displacements.
RESULTS
Both strata were identifiable in 105 joints which had disc displacement with reduction. Lower stratum was not identifiable in 35 joints which had disc displacement without reduction but 12 of 35 had hyalinized posterior attachment where the disc was. The 8 joints which had partial disc displacement without reduction showed identifiable lower stratum at the reducing site which was medial.
CONCLUSION
Disruption or no identification of lower stratum which corresponds to the condylar portion of posterior attachment may be the sign of disc displacement without reduction.

Keyword

diagnostic imaging; temporomandibular joint disorders; magnetic resonance imaging

MeSH Terms

Diagnostic Imaging
Humans
Hyalin
Joints
Magnetic Resonance Imaging
Mouth
Temporomandibular Joint Disorders
Temporomandibular Joint*