What is Bilaminar zone?

The retrodiscal (bilaminar) zone is located between the posterior band of the TMJ disc and the posterior portion of the TMJ capsule. The ‘bilaminar’ refers to the two posterior attachments of the disc: superior layer: elastic to allow anterior translation of the disc over the articular eminence.

What is a pseudo disc?

The term “internal derangements” refers to conditions with the articular disc displaced from its original position on the mandibular condyle. There are several specific conditions, differentiated by the position of the articular disc during mandibular movement and nonmovement.

What is the TMJ made of?

The temporomandibular joint (TMJ) is formed by the articulation of the mandible and the temporal bone of the cranium. It is located anteriorly to the tragus of the ear, on the lateral aspect of the face.

What type of joint is temporomandibular?

The temporomandibular joint (TMJ), also known as the mandibular joint, is an ellipsoid variety of the right and left synovial joints forming a bicondylar articulation.

Which is the correct definition of retrodiscal tissue?

(redirected from retrodiscal tissue) (bī-lam’i-nar-zōn), a mass of loose connective tissue attached to the posterior edge of the articular disc of the temporomandibular joint. It extends to and fills the loose folds of the posterior joint capsule.

How is retrodiscal tissue related to temporomandibular disorder?

Retrodiscal tissue – Unlike the disc itself, the retrodiscal tissue is vascular and highly innervated. As a result, the retrodiscal tissue is often a major contributor to the pain of Temporomandibular Disorder (TMD), particularly when there is inflammation or compression within the joint The ligaments give passive stability to the TMJ.

Where does the T2 signal from retrodiscal tissue come from?

The T2 signal from the retrodiscal tissue was measured on the MR scanner and was corelated to the degree of pain. The articular disc is attached posteriorly to a region of loose connective tissue that is highly vascularized and well innervated, known as the retrodiscal tissue.

Where is the retrodiscal zone of the TMJ?

The retrodiscal (bilaminar) zone is located between the posterior band of the TMJ disc and the posterior portion of the TMJ capsule. The ‘bilaminar’ refers to the two posterior attachments of the disc: It also contains a small neurovascular bundle. In TMJ inflammation, the retrodiscal area is a prominant site of edema.