Which phase of jaw movement involves the glide of the disc-condyle complex?

The translation phase of opening is characterized by the glide of the disc-condyle complex. During this phase, the condyle moves forward and downward, along with the articular disc that rests on it. This movement is essential for the mouth to open wider, allowing the jaw to achieve a greater range of motion.

In this phase, the disc and condyle move as a unit, providing stability and enhancing the smoothness of the motion. Proper functioning during this phase is crucial for normal jaw mechanics, as it allows for effective function during activities such as chewing and speaking.

The other phases involve different types of movements that do not primarily include the gliding action seen in the translation phase. Understanding this distinction is key to grasping the biomechanics of TMJ movements and the importance of the disc-condyle complex during these actions.