If the right TMJ capsule does not fully lengthen, what movement dysfunction can you expect?

When the right TMJ capsule does not fully lengthen, it restricts the movement of the mandible during opening, leading to a deviation. In this case, because the right side is affected, the mandible tends to deviate to the left during opening. This occurs as the left side can move normally, while the right side is restricted. As a result, the mandible compensates for the limited motion on the right by veering toward the left during the opening movement.

It's important to understand that if there were no deviation during opening, it would suggest that both sides of the TMJ are functioning properly with no restrictions. Stiffness in the jaw may be a symptom experienced, but it does not define the specific movement dysfunction in terms of lateral deviation during the mouth opening process.

Thus, the movement dysfunction expected when the right TMJ capsule fails to fully lengthen is indeed characterized by a deviation to the left as the mouth opens, reflecting the imbalance in movement caused by the restriction on the affected side.