Retrodiscal zone

The retrodiscal zone (bilaminar zone) of the TMJ joint is located between the posterior band of the articular disc and the posterior part of the articular capsule. It contains the two layers attaching the articular disc and vasculonervous structures:

• The superior retrodiscal layer of the TMJ joint is a lamina composed of connective tissue and elastic fibers that continues the posterior part of the articular disk and connects the disc to the tympanic plate of the temporal bone.

• The inferior retrodiscal layer of the TMJ joint is a lamina composed of collagen fibers that continues the posterior part of the articular disk and inserts into the condylar neck.