What is the primary limitation imposed by the TM ligament?

The primary limitation imposed by the TM ligament is related to lateral displacement and mandibular retrusion. The temporomandibular (TM) ligament plays a crucial role in stabilizing the temporomandibular joint by restraining excessive movements. It is primarily responsible for controlling movements that could lead to the dislocation of the joint, particularly movements that pull the mandible backward (retrusion) and side-to-side (lateral displacement).

The TM ligament prevents excessive retraction of the mandible during functional activities, thereby maintaining the congruity of the joint surfaces and allowing for smooth movements. This stabilization is essential in preventing conditions such as TMJ disorders that could arise from excessive or unbalanced movements.

Understanding the limitations imposed by the TM ligament is important for practitioners as it helps inform the management and treatment of various TMJ-related issues, focusing on maintaining joint stability and function.