Which tissue must stretch to facilitate mandible protrusion?

The bilaminar retrodiscal tissue is crucial for the protrusion of the mandible because it serves as an attachment point and helps to distribute forces at the temporomandibular joint (TMJ). During mandible protrusion, the head of the mandible moves forward and slightly downward. This movement requires the bilaminar retrodiscal tissue to stretch, allowing for the necessary range of motion.

This tissue consists of two layers – a superior and an inferior layer – and is located behind the articular disc. Its elasticity and capacity to stretch are essential for accommodating the changes in position of the mandible during movements such as protrusion, thereby preventing restrictions and facilitating smooth motion within the joint.

This aspect of the bilaminar retrodiscal tissue directly supports the mechanics of the TMJ, enabling proper jaw function and contributing to the overall health of the joint. It plays a key role in the movement of the mandible, ensuring that protrusion can occur effectively without discomfort or mechanical failure in the joint.